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About the cutcell approach

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Old   September 1, 2005, 23:38
Default Currently I am working on the
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chen_jun
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Currently I am working on the bubble dynamics with OpenFoam. I want to use a fixed-grid, sharp-interface method for it. Is it difficult to implement a cut-cell approach for moving boundary in OpenFoam? Please give me some suggestion, thanks very much.
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Old   September 7, 2005, 07:43
Default Is there any class that I can
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chen_jun
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Is there any class that I can deal with just one or two cells? For example, I want to cut a cell by a plane or merge two adjoining cells.
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Old   September 7, 2005, 07:56
Default Hi Chen, you can cut cells an
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Tommaso Lucchini
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Hi Chen,
you can cut cells and deal with moving boundary by means of the mesh modifiers implemented in OpenFoam.
Have a look at the $FOAM_SRC/topoFvMeshes, $FOAM_TUTORIALS/icoTopoFoam and $FOAM_APP/incompressible/icoTopoFoam

If you want only to move boundaries without changing the mesh topology you can have a look at how the mesh is moved in the movePiston.H file in the $FOAM_SRC/engine/include

You can also find something useful in the discussion group, have a look to the "Dynamic Mesh Changes" topic in the tree view.

bye
tommaso
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Old   September 8, 2005, 05:46
Default Hi Chen, Cut cell by plane:
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Mattijs Janssens
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Hi Chen,

Cut cell by plane: the closest example is the mesh/advanced/refineWallLayer. Defines cut through cells by the cut through the edges and/or vertices.

Merge two adjoining cells: mesh/advanced/removeFaces
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Old   September 8, 2005, 07:09
Default Thank you! I have tried the c
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chen_jun
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Thank you!
I have tried the class cellCuts and it seems to work.
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Old   September 8, 2005, 07:30
Default Would be quite interested to s
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Mattijs Janssens
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Would be quite interested to see some examples if you have something working.
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Old   September 8, 2005, 08:28
Default http://www.cfd-online.com/Open
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Old   September 12, 2005, 12:36
Default I have generated a uniform 2-D
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chen_jun
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I have generated a uniform 2-D mesh using blockMesh. Then I used the removeFaces to merge two adjoining cells by adding the adjoining face into the faceSet. But I got an error message "XXXX face is not internal". Can you tell me why?
Thank you very much for your kind reply!
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Old   September 12, 2005, 13:44
Default Are you sure the faces you're
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Mattijs Janssens
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Are you sure the faces you're trying to remove are internal (i.e. inbetween two cells)? Use foamToVTK with the -faceSet option to display them.
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