A Mixed Eulerian Lagrangian Approach to High Speed Collision between Solid Structures on Parallel Clusters

摘要

For collision problems, where a projectile penetrates a structure, tracking the interface between one material and another becomes very complex. The conventional approaches to the analysis of collision processes involve a Lagrangian-Lagrangian contact driven methodology. The solution time for such simulations is very substantial and, frequently, the scalability of its parallel implementation is inhibited by the contact analysis component of the calculations. This paper describes a 'two-fluid' Eulerian approach to high speed impact between solid structures, where the objective is to overcome the problems of penetration and re-meshing, and so retain the parallel scalability afforded by conventional CFD applications.