报告题目：Computational Hypersonics – From Parabolized Navier-Stokes (PNS) to Navier-Stokes to Burnett to Boltzmann Equation
报告人：Prof. Ramesh K. Agarwal
Department of Mechanical Engineering and Materials Science, Washington University in St. Louis
时间：2013年8月30日(星期五)上午10：00-11：00
地点：力学所主楼312会议室
报告摘要：
Since the successful launch of Sputnik in low earth orbit in 1957, there has been tremendous interest in exploration of space and access to space using space bound vehicles in both unmanned and manned missions to planetary bodies such as moon, mars, asteroids etc. The design of space vehicles for low earth orbit for access to International Space Station (ISS) and for distant planetary exploration has sparred research in hypersonics for over five decades. With the advent of Computational Fluid Dynamics (CFD) in early seventies, and the development of theoretical/empirical models to characterize the aero-heating, rarefaction and transitional effects on a space vehicle, the new fields of Computational Aerothermodynamics and Computational Hypersonics have emerged. This lecture will describe the evolution of computational hypersonics since late seventies using various sets of compressible fluid dynamics equations of increasing complexity. The presenter of this lecture has been personally involved over a span of forty years. As the computing power has increased by more than ten orders of magnitude in last forty years, it has become possible to solve equations of increasing complexity to accurately capture many physical phenomena especially in transitional rarefied regime. The lecture will provide a guided tour of these developments covering the solution of Parabolized Navier-Stokes, Navier-Stokes, Extended Hydrodynamics equations such as Burnett and Grad’s moment equations, and the Boltzmann equation. In particular, it will show the application of the computational tools to the analysis and design of real world space vehicles such as Space Shuttle, Delta-Launch vehicle, SSTO, Delta-Clipper, AFE , Endoleap, Orion –CEV, OTV, HTV and experimental configurations such as Hy-Bolt, Hi-Shot and Hi-Fire.
报告人简介：
Dr. Agarwal is the William Palm Professor of Engineering at Washington University in St. Louis. He is the Fellow of 20 professional societies including AAAS, APS, AIAA, ASME, SME, SAE, IEEE, ASCE, AAM, ASEE，IOP，IET, EI, WIF. Over a period of thirty five years, Dr. Agarwal has made pioneering contributions to both the development of CFD methods and industrial grade codes for the aerodynamic analysis and design of all categories of aerospace vehicles (transport and fighter aircraft, missile and launch vehicles, helicopter rotors, and hypersonic configurations) that have benefited society in the areas national security, air transportation and space exploration. Dr. Agarwal has worked in both basic and applied research. He has worked in all aspects of computational fluid dynamics—namely, grid-generation, adaptive and multi-grid methods, and solution of nonlinear potential, Euler and Navier-Stokes equations, viscous-inviscid interactions, boundary-layer flows, turbulence modeling, and parallel processing. Dr. Agarwal developed algorithms for the solution of non-linear partial differential equations governing fluid motion and implemented them on most advanced supercomputers and parallel computers available at a given time. Since 2008, he is spearheading the effort on development of codes on GPU computers. The industrial grade codes developed by Dr. Agarwal on supercomputing platforms were extensively used by various McDonnell Douglas divisions for the calculation of transport and military aircraft, missile and launch vehicles, and helicopter flow fields. He has also worked in the areas of computational electromagnetic (CEM), computational acoustics (CAA), magnetohydrodynamics (MHD), multidisciplinary optimization, micro-fluidics, bio-fluid dynamics, flow control and rarefied gas dynamics (Boltzmann equation).
