Prof. Xiaowen Shan is a Chair Professor at the
Institute for Advanced Studies at BNU-HKBU United International College. Dr.
Shan received his BS and MS degrees from Beijing University in 1985 and 1988
respectively, and his Ph. D. from Dartmouth College in 1991. From 1991 to 2012
he worked at Los Alamos National Laboratory, Microsoft, and Exa Corporation
(now part of Dassault Systems SE). In 2012 he joined Beijing Research Center of
the Commercial Aircraft Company of China (COMAC) as the Director for Aerodynamics.
In 2016 he joined the Department of Mechanics and Aerospace Engineering,
Southern University of Science and Technology as the founding department head.
Dr. Shan is best known for the Shan-Chen non-ideal gas lattice Boltzmann model
that he co-invented in 1993. The original paper published in Physical Review E
was recognized as one of the 25 Milestones in celebrating the Journal’s 25th
anniversary in 2018. In 2009 he was elected a Fellow of American Physical
Society for “seminal contributions in the formulation and applications of
lattice Boltzmann models for multiphase and complex fluids; and for pioneering
Lattice-Boltzmann-method based fluid dynamics algorithms for real-world
engineering applications.”
Lattice Boltzmann method for non-equilibrium
flows
Title: Lattice Boltzmann method for non-equilibrium flows
Abstract: Historically the lattice Boltzmann method (LBM) was developed from the lattice gas cellular automaton (LGA) a posterior by adopting a single-relaxation-time collision operator to enforce Navier-Stokes hydrodynamics at the macroscopic level. It was later re-formulated as a velocity-space discretization of the Boltzmann-BGK equation in continuum. More recently we derived a spectral multiple-relaxation-time (SMRT) LBM model which is a velocity-space discretization of Grad’s eigen system where the eigen-functions are the trace-less decomposition of the tensorial Hermite polynomials which are equivalent to the eigen-functions of the linearized Boltzmann collision operator as first obtained by Wang-Chang and Ulenbeck. This equivalence allows the highly efficient LBM scheme to be extended to non-equilibrium flow regime. We shall review the SMRT-LBM model and report computation results on typical non-equilibrium flows such as the spontaneous Rayleigh–Brillouin scattering and the structure of shockwave.
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