Gustaaf Jacobs
San Diego State University, USA
Title: Multi-scale modeling of particle-laden flow with shocks
Biography
Biography: Gustaaf Jacobs
Abstract
Particle-laden fl ows have many scales ranging from the large-scale process scale up to the minute particle scale. Th is type of multiscale problems appears in several important engineering applications, e.g. the dynamics of particle-laden gases, deformation of heterogeneous materials such as bones, concrete, heterogeneous explosives, sediment transport in river beds and mesoscale models of blood fl ow. In such problems, computational approaches typically model unresolved or subgrid scales in an ad-hoc manner. Closure laws are obtained from physical experiments, canonical theoretical constructs or phenomenological arguments. In multiscale modeling, the macroscale is coupled with a mesoscale approach and closure laws are obtained from highly resolved mesoscale simulations. In this presentation, I will discuss multiscale modeling for particle-laden fl ows with shocks. Highly resolved mesoscale simulations of a shock interaction with a cloud of particles are discussed. Macroscale computations of the shock-fl uid problem are performed where a point particle assumption is used to model the particle phase. Th e linkage between scales is established through metamodels that assimilate mesoscale physics into surrogate models and serve as closure models for the macro-scale simulations.