Nonequilibrium effects of reactive fiow based on gas kinetic theory  

作　　者：Xianli Su Chuandong Lin 

机构地区：[1]Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-sen University,Zhuhai 519082,China

出　　处：《Communications in Theoretical Physics》2022年第3期104-111,共8页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)under Grant Nos.51806116 and 11875001。

摘　　要：How to accurately probe chemically reactive fiows with essential thermodynamic nonequilibrium effects is an open issue.Via the Chapman–Enskog analysis,the local nonequilibrium particle velocity distribution function is derived from the gas kinetic theory.It is demonstrated theoretically and numerically that the distribution function depends on the physical quantities and derivatives,and is independent of the chemical reactions directly as the chemical time scale is longer than the molecular relaxation time.Based on the simulation results of the discrete Boltzmann model,the departure between equilibrium and nonequilibrium distribution functions is obtained and analyzed around the detonation wave.In addition,it has been verified for the first time that the kinetic moments calculated by summations of the discrete distribution functions are close to those calculated by integrals of their original forms.

关 键 词：discrete Boltzmann method reactive fiow DETONATION nonequilibrium effect 

分 类 号：O354[理学—流体力学] O642.1[理学—力学]