Interface Tracking in Eulerian and MMALE Calculations
Gabi Luttwak · AIP conference proceedings · 2002
In multi‐material Eulerian and MMALE (Multi‐material Arbitrary Lagrangian Eulerian) calculations, the material boundaries may cut through the grid lines and it is necessary to locate their position. Typical Eulerian codes use a Cartesian mesh, but for a MMALE code, the mesh is moving and cannot remain Cartesian. We use a Youngs type 3D interface reconstruction, based on the volumes of the fluid in the neighboring zones. This method was first implemented in the 2D code MMALE. We have since applied it to 3D Cartesian mesh in the code AUTODYN‐3D. In the present work, we show how this approach can be extended to handle a 3D non‐Cartesian MMALE mesh. The advantages and the limitations of the method are discussed, and we consider ways to further improve it.