[ChWalther]

Hello
I still have some problems to run my engine case, when I use thobois or accordionEngineMesch engineTopoChangerMEsh my engine doesnt move.
LayerAR works fine.
I use OF 1.6-ext, thoboisMesh, laplaceCellDecompositionMotionSolver,
my MotionU file:

dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
piston
{
type componentMixed;
refValue $internalField;
valueFraction uniform (0 0 1);
}
cylinderHead
{
type fixedValue;
value $internalField;
}
liner
{
type componentMixed;
refValue $internalField;
valueFraction uniform (1 1 0);
}
}

my dynamicMeshDict:

solver laplaceCellDecomposition;
diffusivity quadratic;

distancePatches 1 (piston);

frozenDiffusion false;

hope you can help.