Wing Motion - Dynamic Mesh using pimpleFoam


I am trying to test out a flapping wing case. I started out with the tutorial case in pimpleFoam/wingMotion. Although I did follow all the steps, the final mesh does not move - the flapping wing motion does not occur. The other sub cases like wingMotion_snappyHexMesh and wingMotion2D_simpleFoam work fine, but the last step alone is troublesome. Can anyone help me with the same?


OpenFOAM 27-01-21, 10:38 a.m. vaishali25

In Allrun file you can see how the tutorial is copying files between folders after running some commands. Check if you missed anything.

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30-08-22, 6:50 a.m. Sashabrows

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Hey, Thank you for replying! I have ensured and cross-checked that all commands described in Allrun file are executed except the decomposePar. As I have issues with running on parallel I have stuck to running the solver the usual way. Could that have affected the solution? Any help is greatly appreciated. Thanks!
27-01-21, 12:37 p.m. vaishali25


I ran the same simulation using Allrun script. It is showing results with moving mesh.
Can you explain the procedure you followed to run the simulation?

Divyesh Variya

27-01-21, 5:15 p.m. divyesh


I ran the same sequence of steps with pimpleDyMFoam solver and it works perfectly fine now. 

Thank you for your time.


28-01-21, 3:33 p.m. vaishali25

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I followed the same steps sequence with the pimpleDyMFoam solver. Can you explain the process you followed to run the simulation? Minecraft Classic
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06-02-23, 4:23 p.m. johnwebb

There could be several reasons why the final mesh does not move in the flapping wing case. Here are a few possible reasons:
  1. Check the controlDict file: The controlDict file controls the time-stepping and overall control of the simulation. Make sure that the start and end times are set correctly, and the time-step size is appropriate for the simulation.
  2. Check the U file: The U file is the initial velocity field for the simulation. Make sure that it is set correctly and is compatible with the motion of the wing.
  3. Check the boundary conditions: The boundary conditions for the flapping wing case are critical. Make sure that the boundary conditions are set correctly for the case. In particular, make sure that the motion of the wing is specified correctly at the wing surface. If none of these suggestions solve the issue, you may need to provide more specific information about the problem to identify the root cause.
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