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-   -   Mesh motion with sliding interface problem (http://www.cfd-online.com/Forums/openfoam-solving/58199-mesh-motion-sliding-interface-problem.html)

sebastian_neumann December 16, 2008 10:26

Hello to all. My name is Se
 
Hello to all.

My name is Sebastian and I try to solve a calculation of a two stroke engine. At first I created a simple case with a cylinder, two inlets and a outlet. For the mesh motion I build my own solver based on the twoStroke topoChanger of OpenFOAM-1.4.1-dev. The solver done his work very well. Now I want to switch to a more complex case with more cells and larger geometry. I donīt no why but the solver gets problems after a short time.At the picture decoupled.jpg you see the scavInCylPatch (liner) and the scavInPortPatch (patch of a channel) before starting the solver. But when I start the solver the calculation brokes off after only 2 time steps with the error: <93>Error in ordering mixed and unused points at the end of the point list.<94> I know that the problem comes from the sliding interface, because the coupling of the scavInPortPatch looks not very good. You can see it in the picture coupled.jpg

http://www.cfd-online.com/OpenFOAM_D...es/1/10358.jpg
http://www.cfd-online.com/OpenFOAM_D...es/1/10359.jpg

Do you have any suggestions how I could change some tolerances or something else to solve this problem ?

Please help me, if anyone does know something about this kind of problem.

Thank you all.
Best regards.
Sebastian


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