陽的無条件安定なCFD手法 : セル・ボルツマン法(宇宙流体(3),一般講演)

概要

論文の詳細を見る
We propose a new computational hydrodynamics method, which we term the cell Boltzmann (CB) method. It belongs to one of time explicit finite volume schemes. In the CB, we solve the Boltzmann equation rather than hydrodynamic equations to simulate a continuum flow. The scheme is unconditionally stable meaning that the time step is not restricted by the CFL condition. The solution becomes smoother when a time step becomes longer than that given by the CFL condition. Other unique characters of the CB are its Galilean invariance, positivity, and its capability of handling zero temperature gas and vacuum easily. The CB scheme can have large dynamic range in density unlike the Molecular Hydrodynamic method proposed by the author earlier. Some numerical examples are presented.
日本流体力学会の論文
2007-08-06