Disperse two-phase flows are composed of liquid droplets or solid particles suspended in a carrier fluid. Examples of such flows are numerous within engineering and science. While the past several decades have seen significant progress in developing predictive modeling capabilities, largely due to the advent of high-performance computing, the majority of these efforts have focused on dilute suspensions of particles under low-speed (incompressible) conditions. This talk will focus on recent progress towards understanding and predicting particle-laden flows in more extreme environments, in which gas-phase compressibility and back--coupling from particles to the fluid have an order-one effect. The fluidization of regolith from a rocket exhaust plume during a planetary/lunar landing acts as the primary motivation for this talk. We will examine the fundamental processes of turbulent particle-laden flows, including state-of-the-art phenomenology from experimental observations, existing theories, and simulation techniques. New numerical methods uniquely designed to address this class of flows will be presented, in addition to high-resolution simulations that allow us to probe turbulence and Mach number effects at the sub-particle scale and at scales that encompass millions of particles.
Dr. Jesse Capecelatro
Assistant Professor in the Departments of Mechanical Engineering and Aerospace Engineering at the University of Michigan. His research group develops numerical methods and data-driven approaches for the prediction and optimization of “messy turbulent flows” relevant to energy and the environment (often multiphase and reacting). Prior to joining Michigan in 2016, Dr. Capecelatro was a research scientist at the Center for Exascale Simulation of Plasma-coupled Combustion (XPACC) at the University of Illinois. He received a B.S. from SUNY Binghamton in 2009, a M.S. from the University of Colorado Boulder in 2011, and a Ph.D. from Cornell in 2014. He is a recipient of the National Science Foundation CAREER Award, the Office of Naval Research Young Investigator Award, and the ASME Pi Tau Sigma Gold Medal Award.