[wangchengan2003]

Dear Foamers,

Now I want to deal with a problem, in which a cavity moves in water with a constant speed. I try to use pimpleDyMFoam (OF 2.4) to solve it. "movingConeTopoFvMesh" is selected in dynamicMeshDict.

In order to simplify the problem, I take a square geometry. At first, the blockMesh unity is used to generate a uniform mesh and everything goes well. Then, I use the snappyHexMesh unity to generate the mesh. It is more easier if the cavity is much smaller than the background or its geometry is complex.

But this time the case dosen't work anymore. I post the errors here:

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"--> FOAM FATAL ERROR:

Cannot find patch for edge 833. Edge: (996 25096)

From function void Foam::layerAdditionRemoval::setRefinement(polyTopo Change& ref)
in file layerAdditionRemoval/addCellLayer.C at line 449.

FOAM aborting
#0 Foam::error:: printStack(Foam::Ostream&) at ??:?
#1 Foam::error::abort() at ??:?
#2 Foam::layerAdditionRemoval::addCellLayer(Foam:: polyTopoChange&) const at ??:?
#3 Foam::layerAdditionRemoval::setRefinement(Foam:: polyTopoChange&) const at ??:?
#4 Foam:: polyTopoChanger::topoChangeRequest() const at ??:?
#5 Foam:: polyTopoChanger::changeMesh(bool, bool, bool, bool) at ??:?
#6 Foam::movingConeTopoFvMesh::update() at ??:?
#7 main at ??:?
#8 __libc_start_main in "/lib/i386-linux-gnu/libc.so.6"
#9 ? at ??:?
Aborted (core dumped)"

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I tried two kinds of mesh by SHM, which are attached in the email. The mesh are not complex but I don't know how to fix it.
If somebody could give me some suggestions on it or some examples?