MEMS Seminar: Computational Models & Methods for Shock Dominated Fluid-Solid Interaction Problems
Wednesday, October 26, 2016 - 12:00pm to 1:00pm
Professor Kevin Wang
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.
Kevin G. Wang is an Assistant Professor in the Department of Aerospace and Ocean Engineering at Virginia Tech, where he leads the Multiphysics Modeling and Computation (M2C) Lab. His research interests include computational fluid-solid interaction and long-term atomistic modeling and computation. Dr. Wang received his Ph.D. in Computational and Mathematical Engineering from Stanford University in 2012, with Gene Golub Dissertation Award. Before joining Virginia Tech, he worked as a Postdoctoral Scholar in the Department of Aerospace at California Institute of Technology.
Lunch will be served from 11:30 am – 12:00 noon