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Seminar - Numerical modeling of high-speed non-equilibrium gas flows by Prof. Yevgeniy A. Bondar
日期:2016 年 11 月 25 日 ( 星期五)
Time:11:00 am – 12:00 pm
Venue:EF305

Abstract:

Comprehensive study of a number of important research problems is necessary for the development of new generations of space vehicles, such as high-performance launchers, re-entry vehicles, small satellites, and interplanetary spacecraft. One of the key topics that need attention is qualitative advancement of current understanding of non-equilibrium flows, which is expected to drastically improve predictive capabilities available to engineers and scientists for the design of new spacecraft. Numerical modeling has become an indispensable tool in understanding the complex non-equilibrium phenomena, in addition to very expensive ground and flight experiments. The Direct Simulation Monte Carlo (DSMC) method is the major numerical technique for studying non-equilibrium flows. SMILE++ is a software tool for DSMC computations developed at the Computational Aerodynamics Lab of ITAM on the basis of principles of Object-Oriented Programming. SMILE++ is a descendant of the widely known SMILE code and incorporates most of the capabilities of the latter as well as many new features. For the altitudes lower than 85 km (in the near-continuum flow regime) the applicability of methods of continuum CFD is still questionable, yet 3D DSMC computations may require tremendous computational resources. One of the promising areas of high-performance computations is the employment of the Graphics Processing Units (GPUs). The high-performance DSMC computational tool SMILE-GPU for 3D computations on hybrid GPU/CPU-based supercomputers has been recently developed at ITAM and applied to different non-reacting rarefied flows with significant degree of thermal non-equilibrium. The recent activity on development of the SMILE++ and SMILE-GPU codes will be overviewed in the presentation. A number of real life applications as well as verification, validation and questions of applicability of different approaches and models to non-equilibrium flows will be discussed in the talk.

Bio-sketch:

Prof. Yevgeniy A. Bondar currently is a Deputy Director of Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences. Prof. Bondar received his Bachelor degree and Master degree from Novosibirsk State University, followed by a PhD degree from Khristianovich Institute of Theoretical and Applied Mechanics. His research interests include rarefied gas dynamics, direct simulation Monte Carlo method, thermally and chemically non-equilibrium gas flows, shock wave reflection phenomena, etc. He has published many papers in related journals and received the Young Scientists Award from Russian Academy of Sciences and three Best Paper Awards from American Institute of Aeronautics and Astronautics.