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Questions on dynamicTopoFvMesh: No mesh update

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Old   October 16, 2014, 10:14
Default Questions on dynamicTopoFvMesh: No mesh update
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Paritosh Vasava
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I am trying a simple simulation where a cross is rotating inside a cylinder. My problem is that the mesh does not update.

I have modified angularOscillatingDisplacement boundary condition for circular motion and used that boundary condition for the rotational movement.

Could someone please help me correct this case? Perhaps the problem is trivial but I can't find whats wrong with the case.

Here are link to the case and boundary condition.
http://www.mediafire.com/download/xi...trv3/cross.zip
http://www.mediafire.com/download/74...arVelocity.zip
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Old   October 20, 2014, 03:30
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Paritosh Vasava
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The problem with my simulation is that the motion of the boundary is right but the mesh does not update.

I still think that I do not understand the slipPatches and freeLengthScalePatches conditions so well. To me slipPatches are the boundaries with some constraints or fixedValuePatches. And freeLengthScalePatches are the boundaries where the length scale of the mesh is calculated by the motion solver.

I have played around with everything but the mesh simply does not update.

I hope this is the right thread to ask questions about mesquite motion solver.
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Old   April 12, 2015, 17:28
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Bruno Santos
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Greetings Paritosh,

As I mentioned in a private message I sent you a few days ago, I've had these 2 posts of yours on my to-do list for quite sometime now.
I've now moved these two posts from the original thread http://www.cfd-online.com/Forums/ope...ofvmesh-3.html - to an independent thread, to make it easier to address your issue in particular.

I'll quote a part of one of the private messages you've sent me, since it provides important details:
Quote:
I have been trying to learn to use dynamic mesh in openFoam. I am using openFoam 2.3 and have installed dynamicTopoFvMesh solver. The solver is connected to mesquiteMotionSolver library.

I could compile both, the library and the solver, by going through numerous posts in the forum. Right now I am assuming that I have compiled everything correctly.

I also found some of the tutorials from training sessions in one of the OpenFOAM workshops. Some tutorials ran ok and some did not.
Very well, I need to know the following:
  1. Which tutorials worked OK and which didn't?
  2. The files that you shared in the first post on this new thread, are they still valid for running with OpenFOAM 2.3?
  3. Are you using OpenFOAM 2.3.0 or 2.3.1?
Best regards,
Bruno
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Old   April 13, 2015, 03:32
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Paritosh Vasava
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Thanks for answering my queries. Also its good to move the discussion here so that others can benefit too!!

Quote:
Originally Posted by wyldckat View Post
[LIST=1][*]Which tutorials worked OK and which didn't?
  1. 1 circCylinder3dHex in the folder moveDynamicMesh folder: The tutorial runs for the full time as in the controlDict file. But when I check the results I see nodes move far from the original mesh and thus the mesh in the intermediate times is with very bad quality. Strangely despite the bad quality the simulation finishes without any complain from openFoam.
  2. 2 ballTranslation in the folder moveDynamicMeshNoCheck: There is no solver name in the controlDict file in the tutorial.
  3. 3 needleValveClosure in the folder moveDynamicMeshNoCheck: he tutorial uses solver 'icoFoamAutoMotion which I guess is either no more in the package or is modified to some other solver. Perhaps *.*DyMFoam.
Quote:
Originally Posted by wyldckat View Post
[LIST=1][*]The files that you shared in the first post on this new thread, are they still valid for running with OpenFOAM 2.3?
Yes. I havent made any changes to openFoam, the dynamic mesh solver and the angular velocity boundary condition.

Quote:
Originally Posted by wyldckat View Post
[LIST=1][*]Are you using OpenFOAM 2.3.0 or 2.3.1?
I am using openFoam 2.3.0.

The tutorials circCylinder3d, circTest, circCylinder3d and movingCylinders ran fine and I tried to use setup from these tutorials to create my own case.
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