Fall 2015
Colloquia are held on Fridays at 11:30 a.m. in Cullimore Lecture Hall II, unless noted otherwise. Refreshments are served at 11:30 am. For questions about the seminar schedule, please contact Yassine Boubendir.
Date: September 11, 2015
Speaker: Gretar Tryggvason
Department of Aerospace and Mechanical Engineering,
University of Notre Dame
Title: "Direct Numerical Simulations of Complex Multiphase Flows"
Abstract:
As direct numerical simulations (DNS) of relatively simple multi fluid and multiphase systems have become feasible, new challenges are emerging. First of all, DNS of large systems with significant range of spatial and temporal scales are yielding enormous amount of data that in addition to providing physical insights, opens up new opportunities for the development of lower order models that describe the average or large-scale behavior. Recent results for bubbly flows and the application of statistical learning tools to extract closure models from the data suggest one possible strategy. Secondly, success with relatively simple systems calls for simulations of more complex problems. Some of the issues, and how both physical insight and new ways to harness very large computers are likely to be needed, will be discussed.
Speaker Bio
Gretar Tryggvason is the Viola D. Hank professor at the University of Notre Dame and the chair of the Department of Aerospace and Mechanical Engineering. He received his PhD from Brown University in 1985 and was on the faculty of the University of Michigan in Ann Arbor until 2000, when he moved to Worcester Polytechnic Institute as the head of the Department of Mechanical Engineering. He moved to the University of Notre Dame in 2010. Professor Tryggvason is well known for his contributions to computational fluid dynamics, particularly the development of methods for computations of multiphase flows and for pioneering direct numerical simulations of such flows. He is a fellow of the APS, ASME and AAAS, the editor-in-chief of the Journal of Computational Physics, and the recipient of several awards, including the 2012 ASME Fluids Engineering Award.