Hi, followed all the steps in similar way, but your nos. of element were about 16k and 20k for mine. Proceeding to setup, I did exactly same as you have shown in video, but the graph is similar in just starting and after 20 iterations it took a sudden jump. Why did this happen? Is there any parameter change done off screen or what settings I have overlooked?

Thanks a lot for this... I'm searching this since 1 month... It will definitely help me... Thanks

@AnsysTutor

6 жыл бұрын

Most Welcome:)

Hello, could you please clarify why you used shell conduction even though you meshed the steel pipe thickness?is it for for modelling the air gap ?

Hello Sir. As PCM melts/solidify the volume expands/compresses. To account for that expansion/compression how we can use air in the domain and whether it'll be two phase or single phase? It would be great if you can share any tutorial on that.

i want to simulate model which consists of double glazed unit filled with phase change material which exposed to convection and solar radiation can you help please ?

can you execute Economizer in ansys fluent ? I have its igs file

Can anyone provide some journals name, links/ Ref where I can find the temperature dependent properties of phase change material. Thanks in advanced.

can you help me with design of heat pipe or vapour chamber please?

Sir Did you used parrafix wax as pcm material in this video?

Please how is the under relaxation factor chosen for the pcm melting phase.

how can i apply this in plate heat exchanger design ?

Thank you, for making this channel

@AnsysTutor

5 жыл бұрын

most welcome

Thank you yaar. Appreciate your effort in making this channel :)

@AnsysTutor

6 жыл бұрын

most welcome.

hi, thanks for your tutorial , i have error with solution this problem , and the error message is (Error at Node 2: Dot product of flow direction and area normal is zero. Check the specified flow direction on Mass Flow Inlet boundary conditions for thread 16. ) , do you know how i can fix it

@AnsysTutor

4 жыл бұрын

you might have not assigned the cell zone material properly, please check, also check if boundary conditions for inlet and outlet sections had been assigned or not.

Does it make sense to set piece wise linear density for PCM? The volume of PCM changes during melting, but the volume of container kept constant. Or have you assume the PCM to be compressible?

@AnsysTutor

5 жыл бұрын

there is only phase change occurs, no change in volume.

Sir I'm getting divergence error in amg solver for the pressure correction ( I'm using 3 walls the outer one is a hollow cylindrical heat sink)

@AnsysTutor

5 жыл бұрын

Decrease the time step size and increase the no of time steps.

Hello, your simulation is good. Right now, I'm working on simulation of thermal conductivity so, if I need to fill the value of anisotropic thermal conductivity of material in matrix 3x3, how to find the value for each components to fill it ?

@AnsysTutor

5 жыл бұрын

for that you need to take the help of user defined functions(UDF)

Thank you for the video.It is very good for the beginner. I have a question about the boundary condition. I use fluent 14.0. When I select pcm_face_inlet, in the thermal conditons, I couldn't find the option of via system coupling. Do you know how could I do in this version? Thanks a lot.

@AnsysTutor

6 жыл бұрын

There might be any other option try them like coupled or any

@AnsysTutor

6 жыл бұрын

Yes , the PCM side walls are closed , so only to transfer heat, you can also assign as adiabatic wall by making heat flux to zero ,there would be no difference due to negligible thickness.

@lianshan9580

6 жыл бұрын

Thanks a lot. I have solved it

I appreciate for this video but there was an error happened when I computed the average volume of liquid fraction. It keep showing net value of 1 instead of 0.6~. Do you think this problem is occurred by the mistype of boundary conditions?

@AnsysTutor

5 жыл бұрын

Check the cell zones , you might have defined wrong materials in different zones.

@kailashlohar6532

4 жыл бұрын

facing same problem

Is it possible to have one phase flow in a fluid domain, and a multiphase flow, like vof model in another fluid domain? For example, PCM and air in the annular space using VOF model, with hot water flowing inside the inner pipe. Once I initiate VOF, fluent regard every fluid as mixture of the different phases. I have trouble with this. Could you please give me some suggestion?

@AnsysTutor

6 жыл бұрын

in that case, you have to make a patching of the fluid regions as volume fraction for the PCM as "1", and for the domain where you want multiphase flow, you should proceed as usual.

@yewenwen4611

6 жыл бұрын

Ansys-Tutor Thanks for your reply, but the problem is that once I initiate the VOF button, it will regard every fluid domain as the mixture of different phase, even the hot water part. I tried to set the water as the third phase, but it doesn’t work, I might have made some mistakes. Can I send you my cas file?

25:58 There is not coupled option in ansys 2020 academic, how can I apply this option? why shell conduction thickness is .001m? when the wall thickness is 2 mm i.e .002m?

@AnsysTutor

3 жыл бұрын

Use adaptive sizing option in the newer versions.

sir, is there any tutorial to find optimum insulation thickness in pipe for cryogenic flow in term pressure drop and heat transfer?

@AnsysTutor

4 жыл бұрын

You have to take various thickness and find out the optimum one. You can watch our tutorial on critical thickness of insulation. Take the help of parametric analysis to get result with less time.

@farisruslee966

4 жыл бұрын

@@AnsysTutor Thank you sir ! I've found the video

Hi sir. I have been studying for six months. i have a problem during to define material properties of PCM . How can i define the spesific heat ( Cp ) as a function of temperature ? For example: At 400 K Cp is 1900 kJ/(kg*K) , at between 400-420 K Cp is 157190 kJ/(kg*K) , at 420 K Cp is 1900 again. I don't know how to define Cp as a function of Temperature. Because it is not piecewise - lineer or piecewise - polynomial or polynomial. Please , Help me about that.

@AnsysTutor

5 жыл бұрын

you can input the user defined function (UDF )for this problem , or try with the piecewise linear option with multiple temperature points, and solve, if the results are satisfactory then proceed with that.

Actually I am doing a research work on Mr dampers. Which software would be suitable where I can change both magnetic field and viscosity of fluid? Thanx in advance

@AnsysTutor

6 жыл бұрын

I think you have to interlink the fluid and magnetic interface both. I mean to say you have to analyze the fluid in fluent and the results of temperature /pressure obtained from fluent to be linked to magnetic analysis interface. Search for the term "ansys multiphysics" over internet to get what i want to say,

Hello Ansys-Tutor, ANSYS Fluent provides two heat transfer models: the default ntu-model and the simple-effectiveness-model. I want to ask generally if there is possible to draw the curve of the local effectiveness according to the liquid fraction in this case. I would really appreciate your answer!

@AnsysTutor

6 жыл бұрын

Are you talking about the heat exchanger models?

@marianthidimoliani3803

6 жыл бұрын

Yes, if we would have more tubes one next to the other to simulate, this situation will be given a behaviour of a heat exchanger with heat transfer fluid (water-liquid) and a stable fluid (PCM). I am asking if there is possible somehow to export the local effectiveness according to liquid fraction. More specifically, if there is a model in CFD to simulate this situation or if there is a choice creating an expession of the effecteviness (ε=exp(1-NTU)) to manage to draw this curve.

@AnsysTutor

6 жыл бұрын

Sorry I dont hv much expertise on this .

@marianthidimoliani3803

6 жыл бұрын

no worries thanks!

Thanks a lot for the video. For the post-processing, I want to plot the liquid fraction with time. However, when I chose the data of liquid fraction in fluent, it doesn't list in the CFD-Post. Do you know how to draw the curve of liquid fraction and time? Thank you very much.

@AnsysTutor

6 жыл бұрын

go to fluent-> monitors-> volume monitors-> create -> report type:volume integral , Field variables :liquid fraction, cell zone :PCM, In option tick the "plot" select window 2 , in x-axis :- time step and then click on "OK" now change the graphics window layout to 2 window. , now calculate the solution, after the completion of iteration , switch to window 2 then click on the camera icon and save the graph

@lianshan9580

6 жыл бұрын

Thank you a lot!!! I see that the magnitude of liquid fraction calculated from volume integral and volume average is totally different. When we draw the contour of liquid fraction in Fluent, I think the value of liquid fraction is displayed according to the volume average, right? Can we draw the contour of liquid fraction depending on the volume integral? Thank you again!

@AnsysTutor

6 жыл бұрын

Go for what you think relevant for your work. I have just written the steps as sample.

@lianshan9580

6 жыл бұрын

Sorry, maybe I am not expressed clearly. I mean when we draw the contours of liquid fraction by Result->Graphics and Animations->Graphics->Contours, the results are displayed depending on the volume average. How can we change the set that makes it show the results depending on the volume integral? Anyway, thank you very much for your reply.

Superb effort dude. Thanks a lot

@AnsysTutor

5 жыл бұрын

Most welcome :))

Hello...I would like to model a high MP PCM in a rectangular thin enclosure with constant heat flux BC at one edge to look at the transient melting behaviour using VOF in fluent as the container has also air in it. But as I start to run the model shows floating error and shows diverging...can you please suggest any modification? Thanks

@AnsysTutor

5 жыл бұрын

check for any void space in the geometry ,the model should be continuous.

@alokray9136

5 жыл бұрын

There is no void space. It's showing divergence detected in AMG solver: pressure correction,VOF. Floating point exception

how you have choose piecewise linear properties of pcm? will this solution work in box (two box outer plastic inside steel)geometry where PCM panels were kept inside for temeraure control because operation range of temperer is 25-40 degree c. please respond thanks

@AnsysTutor

Жыл бұрын

For each phase change material simulation, you need to use temperature dependent material properties. For that reason, I have used piecewise linear properties.

I noticed you have not included gravity. Can Boussinesq Approximation be used for a bouyancy driven case? Also, it'd be great could you upload the melting animation video

@AnsysTutor

5 жыл бұрын

I have not tried boussnesq , you please try once and check whether results are getting matched or not.for simplicity and to avoid divergence in the solution we have not considered the buoyancy. You can take gravity with a small time step to avoid divergence and analyze natural convection

@ritvijdixit2932

5 жыл бұрын

@@AnsysTutor 2D cases work well with boussinesq, however, I am facing convergence issues for 3D. Fluent displays an error for temperature limits. Might have to rework the mesh

Very helpful! Thank you.

@AnsysTutor

Жыл бұрын

You're welcome!

Hello! Is it necessary to define PCM as a peace wise linear? Can't we make it constant value?

@AnsysTutor

3 жыл бұрын

If you make it a constant value, you would not be able to get the melting effect.

Hello Sir.. In this model in place of constant temperature to outer pipe,if I am giving constant heat flux boundary condition..I am not getting any liquid fraction after 1000sec.. Can you please suggest what to do?

@AnsysTutor

4 жыл бұрын

try with adding pipe wall thickness in Shell condution option.

Sir, I am having "Floating Point Exception" while running calculations. I am working on Ansys R18.2 and the probable reason is that I am unable to turn off the "adaptive size function" while meshing. Kindly help me out as soon as possible.

@AnsysTutor

5 жыл бұрын

no that might not be the reason , such type of problem occurs if you have not saved the solution or there is a less memory availability.

Thank you sir, ı want to know that how determine temperature dependent thermal conductuvity for RT35HC pcm material? Are there any formula? Please help me🙏

@AnsysTutor

3 жыл бұрын

You need to search it in book or any research publications.

Hi! Thank you so much for this valuable tutorial. When I search online I can't understand why you use "via system coupling" thanks!

I have some questions to ask regarding melting enhancement for PCMs using fins and foams. Can you please ans me.

@AnsysTutor

4 жыл бұрын

Yes , please ask .

Hello Sir. How to ensure that the orientation of heat exchanger is horizontal or vertical? As the sketch is drawn in xy plane and g acts in -ve z direction. So this is vertical or horizontal orientation?

@AnsysTutor

4 жыл бұрын

It depends on you on which direction you want to keep the gravity.

@alokray9136

4 жыл бұрын

@@AnsysTutor Thank you. So it is vertical orientation . How to model the volume expansion and compression during melting/solidification of PCM?Could you please share a tutorial on this type of problem.

Hi can I ask if I can use boussinesq approximation to achieve the same results?

@AnsysTutor

5 жыл бұрын

yes ,try it.

@ethanmax97

4 жыл бұрын

I would like to know if utilizing the boussinesq approximation worked?

1. does anyone know of a research paper related to it 2, source of properties used in creating pcm 3. can't find liquid fraction and mass fraction in ansys 2019 R2 version thanks in advance

@AnsysTutor

4 жыл бұрын

This tutorial was requested by one of our subscribers, he had given me only the thermophysical material properties. You can find that pdf link in the description.

in my ansys fluent solver, iam unable to get via system coupling boundary condition for pcm inlet , pcm outlet, inner pipe wall and wall outer pipe solid. The options are only conduction convection, radiation and mixing. how to setup the boundary conditions for these four boundaries. i tried giving symmetry but it didnot not giving the same results as shown in the tutorial. can u pls. help me with this

@AnsysTutor

5 жыл бұрын

Check the cell zone conditions, whether you have defined it solid or liquid.

@nanisampathify

5 жыл бұрын

in cell zone conditions, both pcm and fluid domain are given as fluid and inner and outerpipe solid are given as solids. exactly followed the modelling shown in tutorial

The latent heat of fusion used here is 161000J/kg. Is this value for the PCM solar salt (60%NaNO3+40%KNO3)?

@AnsysTutor

3 жыл бұрын

Yes, reference table given in the description.

Hi, if i want to simulate the solidification of a block of phase change material with a cold fluid circuoating on serpentines and i don't want to draw the thickness of the serpentines. Which boundary conditions i can put at this interface ? Is just coupled wall boudary enough or i put also shell conduction or wall conduction ? Thank you for helping

@mounarahal256

3 жыл бұрын

I have another questions : when you put all the solids in one part? how does ansys recognize the interface because it seems that you don't have 'mesh interfaces' in the setup? did you apply share topology for that or you define them manually? and if is it possible for my case to make 2 parts (serpentine and PCM block) and apply the same methodology without considering the thickness of serpentines as i mentionned before?

@AnsysTutor

3 жыл бұрын

If you have not created the pipe body, you can put the shell conduction or wall thickness.

@AnsysTutor

3 жыл бұрын

In the cellzone ,you can define the material for that part.

For which pcm material have you done this simulation and how did you calculate the points when you defined density as varying piecewise linear .

@AnsysTutor

4 жыл бұрын

Its molten NaNO3, details material properties given in the description.

@satyanarayanavenkat3140

4 жыл бұрын

@@AnsysTutor OMG! Thank you so much Sir ❤️ for your immediate response. I am doing a small project on melting and solidification of pcm using paraffin wax. I am facing difficulty in defining the way you have defined for NaNO3 in the video using piecewise linear. Can I contact you through your email. I need to submit my project assignment by tomorrow Sir. Can you pl help me ?

@AnsysTutor

4 жыл бұрын

Yes , you can mail it ansystutor7@gmail.com

@ninoiiidumlao9900

2 жыл бұрын

@@satyanarayanavenkat3140 hello! i do have the same project as you.. may I know how to decide on the values to use when using the piecewise linear function for density? for my current simulations ive been using constant value which is from a datasheet.

This is very useful, thank you! Do you think you can tell me from where did you find those temperature dependent properties of the PCM? It would be very helpful if you could tell me the source, because I want to melt several others PCM-s in ANSYS and I need their temperature dependent properties.

@AnsysTutor

6 жыл бұрын

I had received the data of PCM from a subscriber. I have also attached the link to the description. Hope that might be helpful.

@roblito25

6 жыл бұрын

Ansys-Tutor do you think I can still have accurate results with only 2 points specified (in the piecewise linear section of the material's properties) for the density, specific heat and thermal conductivity?

@AnsysTutor

6 жыл бұрын

No, you need to do some linear interpolations to get some intermediate points data. with only 2 point you might get divergence error or inaccurate results.

Thank you for awesome tutorial, i want to know that how to determine temperature dependent thermal conductivity for other material?

@AnsysTutor

5 жыл бұрын

you need to search over the internet in books journals for the material property.

@hardikkumarchaudhari2648

5 жыл бұрын

Thank you, sir.

sir, is there any tutorial on 2D simulation of doublet tube with phase change material ?

@AnsysTutor

3 жыл бұрын

No, we dont have tutorial in 2D. Will try to make a tutorial on this.

Hi, I want to simulate the solidification of water in a pipe(PCM is the water). I want to consider the variation of thermal conductivity and density of the water and the ice during the process. I am able to set the water properties, but I don't know how to set thermal conductivity of ice(2.26 W/mk) which is greater than water(0.6 W/mk). and similarly density of ice. Thanks

@AnsysTutor

6 жыл бұрын

use piecewise linear to define the thermal conductivity properties.

@hhm5818

6 жыл бұрын

Thanks, I still have error, can i send you the file.

@govardhanseshasayee2283

Жыл бұрын

Have you got the solidus and Liquidous temperature of water and what have you given viscosity and pure solvent heat, would be useful if you have got the values

Sir I am doing pcm and hot air in a rectangular hollow enclosure there is a problem pcm melting,no change in pcm.

@AnsysTutor

6 жыл бұрын

is the heat from air is sufficient to melt the PCM ? Have you calculated the amount of heat required for PCM melting and the "pure solvent melting heat" value given in the PCM material properties. Check the heat gain and lost from the air and pcm domain.

@pragyan11114

6 жыл бұрын

It shows divergence error at temperature.

@AnsysTutor

6 жыл бұрын

what is the time step in your analysis?, Have you enabled the gravity?

Sir, First of all thanks for the video that you uploaded on youtube about PCM. the property values of PCM that you choose are from pdf, right? but the melting temperature was not there. what is that value.? and what is the PCM material? say I need to find the performance of paraffin wax instead of your PCM material, then what is the temperature limits that I have to give for corresponding properties values. please make a reply sir.

@AnsysTutor

4 жыл бұрын

I have given the link of properties table in the description ,its the NaNO3 and KNO3 eutectic mixture. For paraffin wax you need to find the Thermo-physical properties and put these properties as shown in the tutorial.

@mechzion01

4 жыл бұрын

@@AnsysTutor sir,I understood that, but melting point of paraffin in 62degree but what is the period of temperature (lower and upper limit of temperature and correspoding property values)..u choose 500to 900k

@mechzion01

4 жыл бұрын

@@dyuthisreedeth are you doing research?

@mohamedshatarah7264

3 жыл бұрын

@@dyuthisreedeth hey my undergraduate dissertation is also based on PCM ith the addition of porous metal if you are still interested maybe e can help each other 😅

Sir thanks a lot i am working on PV/T system. that would be great help if you refer any tutorial or any reference especially for refrigerant system

@AnsysTutor

5 жыл бұрын

just learn some basic concepts of Ansys ,then model your geometry and do the analysis in ANSYS . If you face any problem in any stage then mail to: ansystutor7@gmail.com

thank you very much, how can I trace the evolution of the temperature as a function of time?

@AnsysTutor

6 жыл бұрын

You can create a save output parameter, also you can get the simultaneous result from monitors->volume monitors -> create, select volume average as report type and volume fraction in field variable, select the cell zone where you want to see the simultaneous result. Tick on "plot" box, select the window where you want to see. make it window 2, and click on OK, now in the toolbar change the display into a two-sided window and run the calculation.

@yasserharmen5252

6 жыл бұрын

Ansys-Tutor thank you very much, I am in research period, and I have to model the phase change for a pcm. I need help, is not there a way to communicate with you?

@AnsysTutor

6 жыл бұрын

you can contact me through email: ansystutor7@gmail.com

Sir, hows the solidification process on this same problem, i need to complete the solidification of pcm for the same

@AnsysTutor

4 жыл бұрын

As you decrease the temperature the solidification process starts. You can check the volume fraction after certain time.

Hi, I keep getting the error message; surface zone #f doesn't exist. Any idea why?

@AnsysTutor

6 жыл бұрын

Check if any contact regions are still present, then make all the domains as one part i geometry.

CAN YOU PLEASE SHOW IT FOR 3 TUBE HEAT EXCHANGER WITH PCM IN 2 ND PIPE

@AnsysTutor

3 жыл бұрын

Will try to make a tutorial.

hi, the 'via coupling system' is a boundary condition to express what in the model? I don't understand what is the meaning of it?

@AnsysTutor

3 жыл бұрын

It acts similar to the coupled wall BC, it make the wall permeable to heat transfer.

@mounarahal256

3 жыл бұрын

@@AnsysTutor thanks. i just have 2 questions : 1 -you mean by the permeable to heat transfer that these two faces inlet and outlet of the PCM are not insulated.They are just closed by a thin metal PCM pipe (copper) without any heat generation . 2-If it is closed by a metal with good insulation there at pcm face outlet and inlet(as if they are closed and insulated ), would the BC be a 0 heat flux?

@AnsysTutor

3 жыл бұрын

1. Yes.2. if you want the pcm end faces to be adiabatic wall then you can put the heat flux=0 boundary condition.

showing below error while running calculations # Divergence detected in AMG solver: x-momentum -> Increasing relaxation sweeps!

@AnsysTutor

6 жыл бұрын

check the meash and the solution controls

Hello, I thank you for your generosity. I need help with my thesis project. I can not have results. Can someone enlighten me?

@AnsysTutor

5 жыл бұрын

yes , please tell me about ur problem, if its possible for me, then definitely I would help.

@mouniaefk6194

5 жыл бұрын

Ansys-Tutor thank you for you answer it's so kind. I work on solid particles tracking simulation generated from a source. I can't define correctly the source and the boundary zones. Thank you very much.

@AnsysTutor

5 жыл бұрын

have you defined the boundaries in meshing stages? as "create named selections"

What are the residuals for this problem for continuity, momentum, and energy?

@AnsysTutor

5 жыл бұрын

in the convergence criteria section I have provided the residual value ,please check

@AnsysTutor

5 жыл бұрын

You can keep it 1e-3 to as minimum as possible.

@alokray9136

5 жыл бұрын

thanks. Can you tell if the heat transfer fluid in the inner pipe has higher temperature than the pcm in annulus, PCM melting will take place wrt time.So for that type of problem what should be suitable BCs?

hello please can you give us a tutorial on thermal analysis of a PCM content wall. THANK YOU

@AnsysTutor

4 жыл бұрын

will try to make a tutorial.

@ahmedbolteya3968

4 жыл бұрын

@@AnsysTutor yes please

What is the name of the mesh you are creating in this video????

@AnsysTutor

5 жыл бұрын

It is known as "Hybrid mesh " as it contains all the type of cells like tetra ,hexa ,pyramid etc.

Can you provide a simulation video for phase change material integrated with metal foam in a 3D recatangular cavity.. thank you

@AnsysTutor

3 жыл бұрын

Sorry cant do it.

@mohamedshatarah7264

3 жыл бұрын

hey my undergraduate dissertation is also based on PCM with the addition of porous metal if you are still interested maybe e can help each other 😅

Please I traing to activat a convection in PCM domaine i have a message error for divergence please how I can do this correctely

@AnsysTutor

6 жыл бұрын

you need to decrease the time step, increase the meshing, and decrease the solution controls with gravity enabled.

@AnsysTutor

6 жыл бұрын

decrease the time step size and corresponding "Number of time steps", as time step size x No. of time step= total time ,

From where did u get the pcm properties?

@AnsysTutor

6 жыл бұрын

we have given the PCM material properties used as PDF in the video description.

where can I find the properties of boron phase change material?

@AnsysTutor

3 жыл бұрын

Please search in some research paper.

Please sir i need your help, i only have energy curve (continuity ,x y z velocity curves does not appear in my case) they converge to zero

@AnsysTutor

5 жыл бұрын

Please check the cell zone condition ,you might have defined the zones as solid material.

@harissmanal740

5 жыл бұрын

@@AnsysTutor Thank you sir , I found where is the problem.Please i need help in my studies project, I have problems with the mesh and the configuration , i need some advices. I can send u my geometry file it's an emergency. Contact me please/ harissmanal@gmail.com

@kenapakenapa1426

4 жыл бұрын

@@harissmanal740 hi, what is the meaning of the graph? Please reply. I need help understand the graph

@kenapakenapa1426

4 жыл бұрын

@@AnsysTutor hi, what is the meaning of graph? Continuity, x y z and velocity? Please reply i need help

Sir, can you give reference for PCM material properties used as PDF book or journal, Thank you for the tutorial

@AnsysTutor

5 жыл бұрын

I have got these material properties from one subscriber. The material properties pdf file has been included in the description.

Thank you so much for the video ..may I know that how can we find the temp in between the pipe or at any point

@AnsysTutor

Жыл бұрын

You need to create a location line in between , then draw the tempr vs length. To get the temperature data in between the wall.

@kanchannegi7199

Жыл бұрын

Thanku you so much for that sir . Actually I'm doing a project on latent heat storage unit parrafin wax so can you help me with that .

thanks for your tutorial. please I am looking for modelisation of solidification of abinary metal alloys under effect of naturel convection if you can help me for that.

@AnsysTutor

4 жыл бұрын

are you facing any difficulty in this?

@abdellatifboumaza6775

4 жыл бұрын

@@AnsysTutor yes please If you can make a video to describe the method. Example Tin with 10%and 3% and 6.5%lead I didn't find this alloys in ansys I will be grateful for you help

@AnsysTutor

4 жыл бұрын

@@abdellatifboumaza6775 you need to define material properties for these as custom material in Fluent.

@abdellatifboumaza6775

4 жыл бұрын

@@AnsysTutor yes I know but how? I have all equations and there properties but I don't know how write UDFs for my problem it's difficult for me

@AnsysTutor

4 жыл бұрын

you don't need any UDF. you can create an excel sheet and using these equations to find material properties for different temperatures, then put these properties as design points as shown in the tutorial and solve. And then validate the result with any previous research article, if it works well then proceed in this way.

Can static magnetic analysis be done in ansys fluent?

@AnsysTutor

6 жыл бұрын

No, fluent basically deals with fluid flow and heat transfer problems.

Hello.Thanks for the video. Can you please supply complete detail regarding the governing equations and BCs applied during the analysis?

@AnsysTutor

5 жыл бұрын

its not possible to provide all the detail , you can search over some standard research papers or ansys fluent manual for the desired equations.

@alokray9136

5 жыл бұрын

@@AnsysTutor ok..Thanks for your reply..I've to simulate another PCM (metal eutectic) having high fusion temperature. I don't find the relation between temperature and properties in any literature.Any suggestion how to handle ?

@manishkumarprasad3760

2 жыл бұрын

@@alokray9136 hello sir, currently i am working in the same field can you provide me some journal ref where i can find the pcm temperature dependent datas. thanks in advanced

Nice video, Which reference did you use in pdf? please provide the original paper/source link for reference.

@AnsysTutor

4 жыл бұрын

It was a request from one of our subscribers. He had only sent the pdf file ,which link I had given in the description.

@rajatkumarmaurya9212

4 жыл бұрын

@@AnsysTutor thanks

Sir can you make video for solidification and melting of flowing water inside subcooled channel

@AnsysTutor

4 жыл бұрын

How the flowing water can be further melted. It's already in molten state. Are you want to say the ice to water melting?

could you make a solidification tutorial of a spherical PCM? thanks a lot for this tutorial!

@chimezieoguike5380

3 жыл бұрын

did you see how to do this anywhere ?

Great video but dont we need to switch on "multiphase" in models ?

@AnsysTutor

3 жыл бұрын

We don't need multiphase, as we had selected solidification and melting option.

And also sir.., i have a doubt, consider a surface, for this surface i need to give a gradual increase in temperature from 300 to 450 kelvin with in a time period of 9am - 4pm. How can i give that

@AnsysTutor

4 жыл бұрын

For this you need to set the time step size and no of time steps in the transient solver calculations page.

@anandukrishnar4388

4 жыл бұрын

@@AnsysTutor how exactly tht work?. consider the same problem..you have applied 511k and run the soln for 200seconds..so melting started ..so in order for solidification the the temp should be less than 511 , we can only assign a constant temperature at a time..so thn i wont even melt?.sir if possible can u give ur email id.

@AnsysTutor

4 жыл бұрын

There might be some region into which its losing heat ,or any convection BC on that wall. For such case you should not apply constant wall BC rather apply patching method. Our mail id ansystutor7@gmail.com

Your initializing temperature is between your solidus and liquidus temperatures. Doesn't that mean that your PCM is already in the melting process? Please correct me if I'm wrong.

@AnsysTutor

5 жыл бұрын

As we had selected "compute from all zones" so the solver had taken the average temperature as per our Boundary conditions, that does not mean it will continue with that initial value throughout the simulation, It will solve as per the boundary conditions. You can do hybrid initialization in which the solver will solve some initial equation and will take the initial values on its own.

@ameyshigrekar5213

5 жыл бұрын

@@AnsysTutor Thank you. This is a very helpful tutorial. :)

Anysys is automatically using my Named selections *Inner pipe outer wall*, *inner pipe inner wall*, *outer pipe inner wall* as contact regions and using it as interface in solver. I cannot change it as shown. What to do in this case?

@AnsysTutor

4 жыл бұрын

You might not have made the parts into a single part.

@paranoid_android6702

4 жыл бұрын

@@AnsysTutor okk, I m sure I did but will check it again. Thnx for replying.

@paranoid_android6702

4 жыл бұрын

@@AnsysTutor hey man sorry to disturb u again. I m getting divergence error : Temperature at 20-22s. I have reduced time step size and increased time steps. My mesh is already refined. But it is still not going. Can u tell me what other possible reasons might be for this error, plz.

@AnsysTutor

4 жыл бұрын

Do you have gravity on?

@paranoid_android6702

4 жыл бұрын

@@AnsysTutor Nope.

Hello sir. When i compute volume weightage average it is showing 0. What can be the reason. Thanks in advance.

@AnsysTutor

4 жыл бұрын

Which parameter are you checking.

@talhaahmed547

4 жыл бұрын

@@AnsysTutor soli to liquid convesrion . Can i send you my geometry.i have hot water in shell and pcm in tubes. There are total 8 tubes.

I tried for another material, and I am getting Liquid fraction as one. Can you help me sir/madam?

@AnsysTutor

2 жыл бұрын

If you would not put the variable material properties, you would not be able to see any changes to the PCM.

PLEASE I HAVE A PROBLEME OF DIVERGENCE WHENE I RAN THE STAEDY CASE

@AnsysTutor

6 жыл бұрын

you might not get the desired result in the steady case. If you are getting such error then try to decrease the solution controls and increase no of iterations.

@nimitzable

5 жыл бұрын

Divergence can be solved. BY refining the mesh or if using explicit method by reducing the time step. Best would be to refine the mesh

thank you bro, this is very good tutorial but if you would make a 2d planner tutorial on same analysis of transient modeling with melting and solidification, this would be a great favor for us, plz make a 2d tutorial as it is not available on KZread. Thanks

@AnsysTutor

3 жыл бұрын

Will try to make a tutorial.

sir, will u make video on flowing of cryogenic fluid through pipe

@AnsysTutor

4 жыл бұрын

If you have any research paper or this then pls send it, will try to make a tutorial if possible.

@kailashlohar6532

4 жыл бұрын

sir will u give your email id

Hello. whether Gravity should be enabled in this problem or not? In which direction we'should enable for this problem?

@AnsysTutor

4 жыл бұрын

if you want to enable gravity you need to decrease the time step and increase the no of iterations in each time step. , otherwise it might cause divergence. ,you can enable gravity in any direction as per your requirement. for the current model you can take it in the negative y Direction.

@alokray9136

4 жыл бұрын

Thank you. I would like to transfer heat from inner fluid to PCM and store it there. The outer wall of outer pipe is insulated and inlet temperature of inner fluid is more than melting point of PCM. But the PCM is not melting after a long time. Can you suggest anything? I am using the same geometry and materials only changing the heat transfer direction.

@AnsysTutor

4 жыл бұрын

@@alokray9136 what is the simulation time you have simulated? is that time is sufficient to melt the PCM?

@alokray9136

4 жыл бұрын

@@AnsysTutor Nearly 2 hour. I think by this time I should get melting fraction to certain extent. I'm referring" Numerical investigation of heat transfer mechanism in a vertical shell and tube latent storage system". This is a 2D simulation and paraffin is the PCM. But I'm trying 3D with different materials. Thank you in advance

I copied every step in your video (same geometry, mesh, boundary condition), still the result isn't same. It diverges drastically after 65th iteration. and it keeps showing PCM value as zero after calculation( from volume integral).

@AnsysTutor

4 жыл бұрын

Decrease the time step and turn off the gravity & try .

@twinklepiyush

4 жыл бұрын

@@AnsysTutor Hey ! thanks for the prompt reply. Need a bit more of help here. 1. I literally copied every detail of ur video. Still, your result converged with 1 time step, mine didn't. (gravity was off). 2. It didn't worked with 0.1 time step even with 10 iterations, diverged very fast. 3. It worked with 0.01 time steps, did 800 iterations with it: a) liquid fraction decreases very slow: time step: 0.01, iteration: 100 liquid fraction: 0.9629 time step: 0.01 iteration: 400 liquid fraction: 0.9611 inlet temp: 300 outlet : 573 K time step: 0.01 iteration:400 liquid fraction: 0.95623 inlet temp:300 outlet :373 K I saw your video and ur liquid fraction decreased very fast. 0.64 to 0.50 . Can you please have a look, why is it so? P.s. It is an amazing video, would have been so much great if only voice was included.

@AnsysTutor

4 жыл бұрын

You had mentioned the time step size & iterations ,what about the no of time steps ?

@twinklepiyush

4 жыл бұрын

@@AnsysTutor ohh, I have mistakenly mentioned iteration, they are actually, number of time steps.

Getting error while solving. Divergence detected in AMG solver: x-momentum -> Increasing relaxation sweeps! Please help

@AnsysTutor

6 жыл бұрын

decrease the timestep size and increase no of time steps.

@rahulkopparthi9039

6 жыл бұрын

Ansys-Tutor still getting the same error.

@AnsysTutor

6 жыл бұрын

try to increase the mesh.

@rahulkopparthi9039

6 жыл бұрын

Ansys-Tutor I increases the number of divisions from 40 to 60 even then it is not working. If you want I can send to u the project file

@rahulkopparthi9039

6 жыл бұрын

Please help me.

im sorry ,im new to ansys. what is the objective of this analysis? it is to determine boiling point ?

@AnsysTutor

4 жыл бұрын

it is an analysis to find out the amount heat that can be stored in the phase change material , which can be used later on.

@amirularief5606

4 жыл бұрын

@@AnsysTutor hi thank you so much, your video is helpful. im at bit confuses , when exactly in this video that we get the amount of heat that can be stored? please help

@amirularief5606

4 жыл бұрын

@@AnsysTutor sir, i need help.please reply. it involve my final year project

@teshomebekelekotu6460

4 жыл бұрын

@@AnsysTutor Sir, How do I know the amount of heat stored in the analysis you made?

Hi Sir, may I know which research paper you referred?

@AnsysTutor

3 жыл бұрын

Its made randomly without any reference.

@dininoordin6546

3 жыл бұрын

@@AnsysTutor Thank you.

Can we do a 2d analysis with PCM in attic space?

@AnsysTutor

4 жыл бұрын

Can you tell a little more about the analysis.

@prabhsingh5068

4 жыл бұрын

​@@AnsysTutor I am applying PCM along with the lift and right wall of the attic with the air in the inner cavity. I am trying to compute the efficiency curve of the PCM. How much heat it absorbs from the outer wall before it turns its state completely.

@ahmedbolteya3968

4 жыл бұрын

@@prabhsingh5068 iam trying same can u help please ?

Hello sir Why is the phase change material considered a fluid and not a solid?

@AnsysTutor

Жыл бұрын

We cant assign viscosity , solidus or liquidus temperatures in solid material properties.

Did you consider the convection between the water and pcm material? It seems that you didn't...I'd suggest before starting your solution, you describe your boundary conditions and assumptions so a viewer has some idea what you are trying to model....

@AnsysTutor

6 жыл бұрын

there is a pipewall between PCM domain and water so there would be only conduction HT in between them. Convection has not been considered in PCM domain only as in this tutorial the main objective was to present the solidification and melting of PCM, assigning PCM material properties in fluent, we got many email query regarding modeling the PCM in CFD so we have created a just basic tutorial,hope it would be helpful . in the future we will show the detailed heat transfer from PCM including conduction and convection, molecular dynamics and multiphase simulation etc. Thank you for your suggestion we will try to do that.

thank you very mitch

@AnsysTutor

6 жыл бұрын

most welcome.:)

how to give input for solidification of binary alloys.

@AnsysTutor

5 жыл бұрын

Similarly you need to give input as I hv given for melting. decrease the temperature and give the density according to that temperature. .

@m_education4474

5 жыл бұрын

Thank you very much for your reply. But I do not have that relationship between temperature and density. The thermophysical properties of the eutectic alloy which has solidus and liquidus temperature both at 821.The liquid density is 3240 and solid density is 3410. So my question is how to get the density-temperature relationship as shown in your case.

@AnsysTutor

5 жыл бұрын

in my case as, in the description of that video you can find i hv attched a PDF file, the property relations are obtained from that . For your case I would suggest you please find the preperty relationship table or any correlation formula.

You haven't considered gravity terms. How is buoyancy for natural Convection considered?

@AnsysTutor

6 жыл бұрын

for simplicity and to avoid divergence in the solution we have not considered the buoyancy. You can take gravity with a small time step to avoid divergence and analyze natural convection.

@vikasgaur4496

6 жыл бұрын

Ansys-Tutor is it possible to insert different liquid and solid PCM properties? If not which properties must be inserted to study melting problem.

@AnsysTutor

6 жыл бұрын

are you asking about a PCM mixture problem?

@vikasgaur4496

6 жыл бұрын

Ansys-Tutor - I've got different properties for solid and liquid phase for the same PCM. But only liquid properties can be inserted in fluent. How can I insert separate solid-liquid properties.

@AnsysTutor

6 жыл бұрын

you have to see this tutorial video carefully, we have also inserted the PCM material properties which is solid initially and as it gains heat it changes to liquid. You have to model the solid PCM as dense fluid and with solidus and liquidus temperature given in the property.

PCM has melting point and solidification point. Why you have taken 9 points?

@AnsysTutor

2 ай бұрын

These are the points to show the melting simulation. Otherwise, fluent would not be able to show melting process.

@maheshkumarlohano8188

2 ай бұрын

@@AnsysTutor how do we know pcm melt at this point. and temperature rise to this

Hello I am getting issues in solving in last part can you please lead to any contact number which can help me

@AnsysTutor

Жыл бұрын

Mail us ansystutor7@gmail.com

hi man, you dont need to fill inside of body because this body is not imported body which means fluent makes it fluid domain

@AnsysTutor

3 жыл бұрын

How fluent will create the geometry and do simulation without the geometry and meshing. Fill option is used to create the geometry it has no relationship with the solver.

Why this video is not playing as usual other do.??

@AnsysTutor

5 ай бұрын

please wait for some days , we are figuring this out with the help of youtube support. ther might be any issue from youtube they are trying to figure this out soon. Stay connected for further updates. Thanks for your report.

@AnsysTutor

5 ай бұрын

Pls check now the issue has been resolved.

thank you but a have style a same problem

@AnsysTutor

6 жыл бұрын

decrease the time step size and corresponding "Number of time steps", as time step size x No. of time step= total time ,

Hello sir I'm a mechanical engineering student my final year project is pcm based heat exchanger I wanted to do the same analysis but with fluid flow Can you please make a video for the same We would be very grateful sir My project deadline is in 2 months Please sir

@AnsysTutor

4 жыл бұрын

It's also a fluid flow problem, can you tell a little more about your project so that I can get you.

@ChandraprakashSingh-fj2jf

4 жыл бұрын

Sir actually we have designed a heat storage device with the phase change material in which we are phasing some problems regarding CDF because the pipe contains fins which are provided on the inner tube wall surface so we have to asign a new material to that also ??

@ChandraprakashSingh-fj2jf

4 жыл бұрын

I have sent you a mail of the photo of that design.

@cfdengineeringmorocco9069

4 жыл бұрын

@ Chandraprakash Singh hi I'm a Energetic engineering student my final year project is pcm based heat exchanger i want Your email to exchange information please.

@mohamedshatarah7264

3 жыл бұрын

@@cfdengineeringmorocco9069 hey my undergraduate dissertation is also based on PCM ith the addition of porous metal if you are still interested maybe we can help each other 😅