Jones Seminar: Discrete Kinetic Theory and Computation for Fluid Flows and Beyond

Hudong Chen, Senior Vice President & Chief Scientific Officer, Exa Corporation

Friday, September 30, 2016, 3:30–4:30pm

Spanos Auditorium, Cummings Hall

The underlying physics in a real fluid is described by a micro-dynamical process with a continuous space and time. Since about two decades ago, there has been a development of a new framework in computational fluid dynamics, namely the so-called lattice Boltzmann methods (LBM). It can be interpreted as an analogue to the Boltzmann kinetic theory on a discrete phase space. As a consequence, fluid phenomena in the usual Navier-Stokes regime as well as beyond may be practically simulated. This “bottom-up” approach to computational fluid dynamics (CFD) is fundamentally different from the conventional “top-down” representation via closed equations at the macroscopic level.  Obviously, the key question is whether and under what conditions such a discrete kinetic formulation may faithfully and sufficiently represent the relevant physics of a real fluid. In this talk, the speaker will first give a brief introduction to some basics of kinetic theory and its discrete offspring, lattice Boltzmann Methods. The emphasis is on certain essential ingredients for recovering various hydrodynamic regimes via proper discretizations. Throughout the talk, the speaker will also present several examples showing various impacts of this new computational fluid dynamics approach in some important real world engineering applications, including extensions for supersonic flows and complex multiphase flows, and so on. 

About the Speaker

Dr. Hudong Chen received his PhD in Physics from Dartmouth under supervision of Professor David Montgomery in 1986. Following that, he worked at University of Delaware and Los Alamos National Laboratory. He returned to the Dartmouth Physics Department as a Research and Visiting Assistant Professor in 1989 until joining a startup company, Exa Corporation, in 1993. During the last two decades working at Exa, Dr. Chen has had a lead role in developing computational fluid dynamics (CFD) software for real-world engineering applications. His current role is the Senior Vice President and Chief Scientific Officer of Exa. The company is now one of the leading CFD software providers in the world. Chen’s scientific research is mainly on kinetic theory, plasma physics, fluid and MHD turbulence, as well as pioneering the lattice Boltzmann methods. Chen also has served on various advisory roles at several academic institutions through the years, including an adjunct professor position at Boston University, a visiting full professor at Harvard University, as well as a member of the Scientific Board of IMASC of Harvard. Chen was elected a Fellow of the American Physical Society in 2000 and has published over 100 scientific papers with close to 6000 citations, as well as a holder of numerous technology patents.

For more information, contact Jessica Widdicombe at 603-646-2606 or jessica.c.widdicombe@dartmouth.edu.