ME Graduate Seminar ME:6191—Multiscale Modeling of Shock-Particle Interactions using Kriging-Based Methods

Thursday, February 2 at 3:30 pm to 4:20 pm
Seamans Center, 3505
103 South Capitol Street, Iowa City, Iowa

Presented by Postdoctoral Fellow Oishik Sen "The interaction of shocks with particles arises in various practical applications, such as pneumatic conveyance of particles in the industries, gas-reactive particle interaction in the nozzle of rocket engines fueled by solid propellant, plume dispersion of explosive volcanic eruptions, and explosive dispersal of particles. Macroscopic computations of shock-particle interactions typically track a large number (in the order of millions) of particles and rely on homogenized (volume averaged/ filtered/coarse-grained) system of equations. The unresolved/subgrid scale physics is encapsulated using closure laws in the homogenized set of macroscale equations. Traditionally, such closure laws were obtained from physical experiments, canonical theoretical constructs or phenomenological arguments. With increasing computational power and improved physical models and algorithms, it is now possible to derive closure laws from highly resolved mesoscale simulations. This presentation addresses the issue of efficient and accurate closure model construction from highly resolved meso-scale simulations in the context of shocked particle-laden flows. Ensembles of high-fidelity mesoscale computations of shockparticle interactions are performed for different Mach Numbers (Ma) and solid volume fractions. The drag from these computations is used to create surrogates using a Modified Bayesian Kriging Method (MBKG). Methods for extending the process to higher-dimensional parameter spaces are also discussed." Individuals with disabilities are encouraged to attend all University of Iowa–sponsored events. If you are a person with a disability who requires a reasonable accommodation in order to participate in this program, please contact Tara Hoadley in advance at tara-hoadley@uiowa.edu.

Contact Info: Tara Hoadley, tara-hoadley@uiowa.edu