MEMS Seminar: Computational Models & Methods for Shock Dominated Fluid-Solid Interaction Problems

Shock dominated fluid-solid interaction problems arise in a number of modern engineering applications. The abrupt, high amplitude pulses of mechanical energy associated with shock waves can be used to crush a kidney stone, destroy an enemy submarine, clean the biofouling on ship hull, and consolidate powders for 3D printing - just to name a few examples. The development of a predictive simulation approach for this type of problems is a formidable challenge. It requires accounting for geometrical nonlinearities and dynamic fracture in the computational model. It also calls for the development of advanced algorithms for the computation and transfer of shock loads on fluid-solid interfaces which often undergo large deformation and topological change. In this talk, a second-order accurate, numerically stable partitioned procedure coupling a 3D finite volume computational fluid dynamics (CFD) solver and a 3D finite element computational solid dynamics (CSD) solver will be presented. Several recently developed numerical methods for tracking complex material interfaces and enforcing the kinematic and dynamic interface conditions will be discussed in detail. The salient features of this computational framework will be demonstrated through applications in shock wave lithotripsy, cavitation erosion, and underwater explosion and implosion.