Abstract
This work presents two different approaches developed by the authors for mesh motion in internal combustion engine simulations. The first one is based on the use of multiple meshes to cover the whole simulation: within its crank angle validity interval, the grid points are moved by using an automatic mesh motion technique based on Laplace's equation and finite-element decomposition of the polyhedral mesh. This approach also requires field mapping, which is performed by an inverse distance weighting method. The second approach changes the grid topology during mesh motion by using dynamic mesh layering and sliding interfaces and only requires an initial valid mesh decomposed in multiple regions. A test-case geometry, consisting of a flat cylinder head with a centrally located valve was used to evaluate both approaches.
