the surfaceFeatures command is not found, I've been trying to fix this problem for quite some time but I haven't been able to

I'm using Ubuntu on windows sir, I want to go to directory like in video., what to do sir

My animation time bar does not display a "(max is 5)" indication, and the animation only changes in decimal increments up to 1. Previous animations following your other tutorials worked perfectly. How can I modify the time parameter in order to view the complete animation?

@ansys_cfd

3 жыл бұрын

In this tutorial the solver used is simplefoam (SimpleFoam is a steady-state solver for incompressible, turbulent flow, using the SIMPLE (Semi-Implicit Method for Pressure Linked Equations) algorithm), here there isn't animation (steady). In this case, the numbers (1-5) represent the convergence process where 5 is when the simulation reaches convergence. This no represents the time. In the previous tutorial (PitzDaily) we used pisofoam solver (Transient solver for incompressible, turbulent flow, using the PISO algorithm.) this solver is used for unsteady simulations and you can generate an animation consider the time.

@danoriron4975

3 жыл бұрын

@@ansys_cfd Thank you. After reviewing this tutorial again, I recognize I missed the critical 'simpleFoam' solver step after 'potentialFoam' processed. Upon a second attempt from the beginning, everything worked as expected. Your tutorials are very helpful in overcoming the learning curve of OpenFOAM.

@ansys_cfd

3 жыл бұрын

Thank you friend. Best regards

Thanks for the nice tutorial, what should be the difference between the two commands surfaceFeatures and surfaceFeatureExtract before applying SnappyHexMesh?

@ansys_cfd

3 жыл бұрын

Hi friend; Good question surfaceFeatureExtract new OpenFoam version surfaceFeatures old openfoam version (V 5). Regards

@heshamzahw286

3 жыл бұрын

​@@ansys_cfd Thank you for your answer. Yes I noticed that later when I found in the system folder no surfaceFeatureExtractdict file, while it was supported in recent versions.

Nice tutorial! Btw, I was wondering now in my nightly thoughts: have you ever attempeded an adjoint shape optimization in OpenFOAM?

thank you my friend :-)

@ansys_cfd

3 жыл бұрын

You're welcome friend Best regards

I get an error during the snappyHexMesh. saying the number of slots is lesser than the requested slots. How do I specify how many cores to use??

@ansys_cfd

3 жыл бұрын

Hi friend. You need to configurate the cores in the virtualbox. Regards

@sp22096

3 жыл бұрын

@@ansys_cfd but bro, im using native ubuntu. Not virtualbox....

One of top youtube Channel

@ansys_cfd

3 жыл бұрын

Thank you friend

@Bkry.N

3 жыл бұрын

@@ansys_cfd can You give advice for learning infinite element analys

what is the density?

When I execute the command simpleFoam, it runs until the iteration 500 but the forceCoeffs didnt change so i get no results. What should I do? smoothSolver: Solving for Ux, Initial residual = 0.547873, Final residual = 0.307769, No Iterations 1000 smoothSolver: Solving for Uy, Initial residual = 0.457213, Final residual = 0.00543555, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 0.447267, Final residual = 0.00434911, No Iterations 1 GAMG: Solving for p, Initial residual = 0.0575077, Final residual = 0.000362013, No Iterations 2 time step continuity errors : sum local = 1.57153e-15, global = 1.59461e-17, cumulative = -6.08816e-10 smoothSolver: Solving for omega, Initial residual = 5.53772e-09, Final residual = 5.53772e-09, No Iterations 0 smoothSolver: Solving for k, Initial residual = 7.51244e-09, Final residual = 7.51244e-09, No Iterations 0 ExecutionTime = 12.07 s ClockTime = 13 s streamLine streamLines write: seeded 20 particles Tracks:20 Total samples:1720 Writing data to "/home/openCFD/workdir/Pedro/motorBike/postProcessing/sets/streamLines/500" nearWallFields near write: Sampling fields to 500 Writing sampled fields to 500 wallBoundedStreamLine wallBoundedStreamLines write: wallBoundedStreamLine : seeded 0 particles. Tracks:0 Total samples:0 forceCoeffs forceCoeffs1 execute: Coefficients Cd : 0 (pressure: 0 viscous: 0) Cs : 0 (pressure: 0 viscous: 0) Cl : 0 (pressure: 0 viscous: 0) CmRoll : 0 (pressure: 0 viscous: 0) CmPitch : 0 (pressure: 0 viscous: 0) CmYaw : 0 (pressure: 0 viscous: 0) Cd(f) : 0 Cd(r) : 0 Cs(f) : 0 Cs(r) : 0 Cl(f) : 0 Cl(r) : 0 ensightWrite ensightWrite write: ( k omega p U ) End

@vaibhavvb9898

Жыл бұрын

I know it’s late and you would have figured it out already. But for those who are facing the same problem, use snappyHexMesh -overwrite instead of snappyHexMesh so that your snappy hex mesh will be used instead of block mesh you used earlier.

@ManavKoul

Жыл бұрын

@@vaibhavvb9898 thank you so much for this! couldn't find it anywhere

@vaibhavvb9898

Жыл бұрын

@@ManavKoul haha glad I could help. I remember I got it from a ppt from google. Even I was in the same spot as you back then.

Which is better Open Foam or Ansys?

@Janeshwar09

3 жыл бұрын

ANSYS is easy as compared to Openfoam..Both are good.. Openfoam is opensource but ANSYS not.

@ansys_cfd

3 жыл бұрын

Yes. it is right;

@brandonjohnson8880

3 жыл бұрын

OpenFOAM is likely more powerful in terms of freedom, custom boundary conditions, fully programmable/editable. But an analyst using ANSYS probably outputs more work for the same given time.