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Dynamic mesh refinement in a 2D or axissymmetric case

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Old   August 22, 2008, 11:34
Default Hello everyone, is there an
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Christian Kunkelmann
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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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Old   August 22, 2008, 13:06
Default The 1.5 dynamicRefineFvMesh (u
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Mattijs Janssens
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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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Old   August 23, 2008, 08:15
Default Mattijs, thank you very muc
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Christian Kunkelmann
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Mattijs,

thank you very much for the quick reply!

Christian
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Old   September 8, 2008, 22:21
Default Hi Mattijs: Where can I fin
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musaddeque hossein
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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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Old   January 19, 2009, 06:15
Default Hi, 1. I also want to use m
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Marco Müller
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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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Old   January 19, 2009, 10:58
Default Marco, Is your case 2D or 3
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Sandeep Menon
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Marco,
Is your case 2D or 3D?
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Old   January 19, 2009, 11:35
Default 3D
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3D
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Old   January 19, 2009, 12:02
Default I've done a fair amount of wor
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Sandeep Menon
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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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Old   January 19, 2009, 12:08
Default Hi, wow, looks fine. That s
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Marco Müller
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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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Old   January 19, 2009, 13:15
Default Derived mesh class which perfo
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Sandeep Menon
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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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