[ChesterP]

Hi everybody,

I'm doing 3D in-cylinder simulations.

When the piston head is moving from BDC to TDC and reaches the cut-off distance I first have skewness issues and then at around 297-298° negative volumes appearing.

So there are problems only for the compression of the tetrahedral mesh.

I tried to vary :
- Spring Constant Factor between 0 and 0.5;
- Boundary Node Relaxation between 0.2 and 1;
- Convergence Tolerance between 0.001 and 0.0001;
- Number of Iterations between 20 and 100;

I remesh at each time step with a crank angle step of 0.05°.

Thanks in advance