物理学报
物理學報
물이학보
2001年
6期
1006-1010
,共5页
Boltzmann模型%分布函数%冲击波%流体力学方程
Boltzmann模型%分佈函數%遲擊波%流體力學方程
Boltzmann모형%분포함수%충격파%류체역학방정
根据微观和宏观之间的质量、动量、能量守恒准则,建立了一个 两维的D2Q13格子Boltzmann模型,可从该D2Q13模型出发推导出宏观的流体力学方程,所得 动量方程和Navier-Stokes方程相比,在黏性输运项上有明显的改进,用该模型对冲击波在 障碍物表面上的折射和反射现象的数值模拟都得到了比较满意的结果,而且数值稳定性也很 好. 证明了D2Q13模型的适宜性. .
根據微觀和宏觀之間的質量、動量、能量守恆準則,建立瞭一箇 兩維的D2Q13格子Boltzmann模型,可從該D2Q13模型齣髮推導齣宏觀的流體力學方程,所得 動量方程和Navier-Stokes方程相比,在黏性輸運項上有明顯的改進,用該模型對遲擊波在 障礙物錶麵上的摺射和反射現象的數值模擬都得到瞭比較滿意的結果,而且數值穩定性也很 好. 證明瞭D2Q13模型的適宜性. .
근거미관화굉관지간적질량、동량、능량수항준칙,건립료일개 량유적D2Q13격자Boltzmann모형,가종해D2Q13모형출발추도출굉관적류체역학방정,소득 동량방정화Navier-Stokes방정상비,재점성수운항상유명현적개진,용해모형대충격파재 장애물표면상적절사화반사현상적수치모의도득도료비교만의적결과,이차수치은정성야흔 호. 증명료D2Q13모형적괄의성. .
A lattice Boltzmann equation model of D2Q13 form in two-dimension space is deve loped according to the conservative criteria of mass, momentum and energy. The e quations of fluid dynamics can be derived from the D2Q13 model, and the momentum equation is obviously improved by comparison with Navier-Stokes equation in th e viscosity transport term. The shock wave reflection phenomena on bevel edge an d edge angle have been simulated by using the model that the results and the num erical stability are very good. It is shown that the model is valid both in theory and in numerical experiment.