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Dynamic mesh refinement in a 2D or axissymmetric case |
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August 22, 2008, 11:34 |
Hello everyone,
is there an
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#1 |
New Member
Christian Kunkelmann
Join Date: Mar 2009
Posts: 8
Rep Power: 17 |
Hello everyone,
is there any way to suppress dynamic mesh refinement (with interDyMFoam) in a certain direction? I am running an axissymmetric (y-axis) case with one or two levels of refinement. Unfortunately the solver refines the mesh in the rotational direction, too. This leads to a wedge geometry with a thickness of 2 or 4 cells (between the wedge boundaries). The simulation continues but produces unphysical results like velocity vectors pointing out of the wedge boundary. Thanks a lot for your help! Christian |
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August 22, 2008, 13:06 |
The 1.5 dynamicRefineFvMesh (u
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#2 |
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Mattijs Janssens
Join Date: Mar 2009
Posts: 1,419
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The 1.5 dynamicRefineFvMesh (used in the interDymFoam tutorial) always does 2x2x2 splitting. Writing a directional one would not be trivial.
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August 23, 2008, 08:15 |
Mattijs,
thank you very muc
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#3 |
New Member
Christian Kunkelmann
Join Date: Mar 2009
Posts: 8
Rep Power: 17 |
Mattijs,
thank you very much for the quick reply! Christian |
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September 8, 2008, 22:21 |
Hi Mattijs:
Where can I fin
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#4 |
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musaddeque hossein
Join Date: Mar 2009
Posts: 309
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Hi Mattijs:
Where can I find the interDyMFoam tutorial? http://www.cfd-online.com/OpenFOAM_D...ons/tree_m.gif Thanks Musa |
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January 19, 2009, 05:15 |
Hi,
1. I also want to use m
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#5 |
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Marco Müller
Join Date: Mar 2009
Location: Germany
Posts: 94
Rep Power: 17 |
Hi,
1. I also want to use mesh refinement in one direction. The simulation is a (transient) enlargement of a crack, which normally would create elements with bad aspect ratio. Refinement (2x2x2) doesnt seem to help for this. Is there any other "out-of-box" method like adding layers (removing, if crack is closed)? (ANSYS hasn't any... ;) 2. For that simulation it would be great to specify the position of the moving boundary by an analytical low of motion (dependent on time and probably XYZ). Whats the proceeding for this? The fvMotionSolver for this would be "displacementLaplacianFvMotionSolver", I guess?! Thanks a lot for your answers. Marco |
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January 19, 2009, 09:58 |
Marco,
Is your case 2D or 3
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#6 |
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Sandeep Menon
Join Date: Mar 2009
Location: Amherst, MA
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Marco,
Is your case 2D or 3D? |
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January 19, 2009, 10:35 |
3D
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#7 |
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Marco Müller
Join Date: Mar 2009
Location: Germany
Posts: 94
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3D
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January 19, 2009, 11:02 |
I've done a fair amount of wor
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#8 |
Senior Member
Sandeep Menon
Join Date: Mar 2009
Location: Amherst, MA
Posts: 403
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I've done a fair amount of work on triangular/tetrahedral re-meshing. The 3D work is still a little preliminary, but take a look at the video and let me know if this is what you're looking for:
3D Tetrahedral Flipping |
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January 19, 2009, 11:08 |
Hi,
wow, looks fine. That s
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#9 |
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Marco Müller
Join Date: Mar 2009
Location: Germany
Posts: 94
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Hi,
wow, looks fine. That seems to be the thing, I'm looking for! Only sounds are missing.. ;) How does it work? ;) Thanks, Marco |
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January 19, 2009, 12:15 |
Derived mesh class which perfo
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#10 |
Senior Member
Sandeep Menon
Join Date: Mar 2009
Location: Amherst, MA
Posts: 403
Rep Power: 25 |
Derived mesh class which performs topological changes based on input criteria. It also uses the mesh-motion solver to minimize the number of topological changes for each time-step.
Doesn't do field mapping yet, though. I'm working on that. |
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