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January 12, 2012, 05:37 |
FSI - dynamic Meshing
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#1 |
New Member
Dimitris
Join Date: Oct 2011
Location: München
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Hello everyone
I want to share a problem i m facing with openFoam dynamic meshing while trying to perform FSI simulations. I m importing new boundary conditions- displacements/velocities from an external FEM solver and put them to the appropriate pointDisplacement/pointMotionU file, depending on the solver i choose. Curiously after the mesh.update() is executed i get a mesh that does not quite follow the new boundary conditions...(?) I tried with simpler deformations and it turns out that it would only work whenever the boundary condition at the specific moving patch is uniform. Did anybody have such a problem before or has any advice for me? |
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January 12, 2012, 09:50 |
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#3 |
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Dimitris
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by uniform i mean sth like:
solidBody { type fixedValue; value uniform (0.1 0.1 0); } Problem starts when the boundary condition in non uniform so instead i input a list of vectors. |
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January 12, 2012, 09:54 |
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#4 |
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Daniel WEI (老魏)
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Hmm.., why did you use fixedValue patch, and not using the sixDoF... patch?
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~ Daniel WEI ------------- Boeing Research & Technology - China Beijing, China |
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January 12, 2012, 10:02 |
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#5 |
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Dimitris
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sixDoFRigidBodyDisplacement is not availiable in version 2.0 i think. I used fixedValue following the icoFsiFoam way.
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January 12, 2012, 10:10 |
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#6 |
Senior Member
Daniel WEI (老魏)
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You mean,
OpenFOAM-2.x/src/postProcessing/functionObjects/forces/pointPatchFields/derived ???
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~ Daniel WEI ------------- Boeing Research & Technology - China Beijing, China |
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January 12, 2012, 10:22 |
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#7 |
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Dimitris
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no i mean
--> FOAM FATAL IO ERROR: Unknown patchField type sixDoFRigidBodyDisplacement for patch type patch Valid patchField types are : 24 ( angularOscillatingDisplacement angularOscillatingVelocity calculated cyclic cyclicSlip empty fixedNormalSlip fixedValue mixed nonuniformTransformCyclic oscillatingDisplacement oscillatingVelocity processor processorCyclic slip surfaceDisplacement surfaceSlipDisplacement symmetryPlane timeVaryingUniformFixedValue uniformFixedValue value waveDisplacement wedge zeroGradient ) |
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January 12, 2012, 10:23 |
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#8 |
Senior Member
Daniel WEI (老魏)
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But surely you can load the .so file to add the new patches.
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~ Daniel WEI ------------- Boeing Research & Technology - China Beijing, China |
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January 12, 2012, 11:03 |
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#9 |
New Member
Dimitris
Join Date: Oct 2011
Location: München
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hmm ok loaded genericPatchFields library but i get some runtime errors...guess i need to check some stuff first. do u have any fsi solver in mind that actually uses this 6dof patch? i only saw it on pimpleDyMfoam but it doesnt seem to help much...
thanks for your help ! |
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January 13, 2012, 13:06 |
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#10 |
Senior Member
Daniel WEI (老魏)
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pimpleDyMFoam can do the job. And sicDoF b.c patch is in another .so library, load the correct one.
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~ Daniel WEI ------------- Boeing Research & Technology - China Beijing, China |
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Tags |
dynamic meshing, fluid-structure, fsi, mesh deformation, mesh displacement |
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