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ghindi March 27, 2010 05:05

Problems with mapFields and moving mesh.
Hi there,

I've an engine cylinder mesh with a complex geometry, so the add/remove layer does not work for me, so I've created different meshs at every 5 crank angle degrees. So, for instance, after running from -100 CAD to -95 CAD with mesh "A", I need to map the fields to mesh "B" that will run from -95 CAD to -90 CAD.
I've created a mapFieldsDict to cut the patch in the piston boundary.
The problem is that the mapFields is creating a lot of cells with zero velocity in my domain, and this is no correct.
Does anyone know how to solve this problem?

Thanks in advance!


Panagioto April 23, 2010 11:42

I've used mapFields this way.

mkdir <new case's name>
cp -r <original case/constant> <new case's name>
cp -r <original case/system> <new case's name>

Then u refine the mesh and in the new case directory u put:

mapFields ../<original case> -consistent

Let me know if this works for you:)

ghindi April 25, 2010 05:56

first of all, thanks for replying.

I've tested that already, without success. I mean, mapFields works but creates lots of regions with high gradients. So when I start the simulation, my Courant number is high and then it crashes. Even reducing the timestep does not work.

I don't know how to avoid this gradients when using mapFields.

If you have any other ideas, please let me know.


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