Department of Mechanical Engineering

Computation and Modeling of Gas-Solid Turbulent Flows

 

Mechanical Engineering Seminar

Thursday, February 8, 2007
10:00 – 10:50 AM
1312 Hoover

Kyle Squires
Professor of Mechanical Engineering
Arizona State University

“Computation and Modeling of Gas-Solid Turbulent Flows”

Abstract Numerical simulation comprises a useful strategy for analysis and prediction of an enormous array of engineering systems. Computations of multiphase flows are especially powerful and can be used to advance fundamental understanding in stand-alone “numerical experiments” and as a complement to physical experiments. This seminar will focus on applications of numerical simulation and modeling to the prediction of gas-solid turbulent flows. The applications of interest are gas-phase turbulent carrier flows with dilute mixtures of particles having diameters small compared to the small scales of the turbulence. While the particle size is small, owing to the large density difference relative to the surrounding fluid, the particles do not follow all of the turbulent fluid fluctuations. The simulation strategy is based on Large Eddy Simulation (LES) of the carrier phase and Discrete Particle Simulation (DPS) for prediction of dispersed-phase properties. Advantages and limitations of these approaches are illustrated in calculations of fully-developed particle-laden turbulent channel flow. The specific features to be described include the role of wall-particle and particle-particle collisions on dispersed-phase transport and an exploration of the spatial structure of the particle velocity field.BiographyProfessor Kyle Squires received his Bachelor of Science degree in Mechanical Engineering from Washington State University in 1984.  At Stanford University he received his Master of Science degree in Mechanical Engineering in 1985 and his Ph.D. in Mechanical Engineering in 1990.  From 1990-1991 he was a post-doctoral researcher at the NASA-Stanford Center for Turbulence Research where he worked on Large-Eddy Simulation and subgrid-scale modeling of compressible turbulence.  In 1991 he joined the Department of Mechanical Engineering at The University of Vermont and in 1997 moved to the Mechanical and Aerospace Engineering Department at Arizona State University where he is currently a Full Professor and the Interim Chair.  During his academic career he has held positions as a Visiting Professor at the Institut National Polytechnique de Toulouse, a Research Fellow of the Department of Mechanical Engineering at The University of Tokyo, and Visiting Associate Professor in the Department of Mechanical Engineering at Stanford University.  His research interests include turbulence modeling for high-Reynolds number applications and numerical simulation and modeling of particle-laden turbulent flows.For questions, contact Charlene Kravinsky (cakravi@iastate.edu)

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