摘要
空间均匀气体内自由度的激发松弛及离解反应,用直接模拟蒙特卡罗方法进行了数值模拟。为模拟非弹性碰撞,采用与变径刚球模型(VHS)相结合的Larsen-Borgnakke模型。振动能与转动能分别考虑,为此发展了一种对有奇异性的分布的取样法,即积累分布-取舍联合法。确定了与实验松弛时间相符的非弹性碰撞数Z_V,Z_R,得到了有转动、振动激发耦合的离解反应的满意的直接模拟。
The excitation of internal degrees of freedom and the dissociation in a spacially homogeneous gas is studied by using the dirct simulation Monte-Carlo method . The inelastic collisions are simated by the Larsen-Borgnakke phenomenological model incorporated with the variable hard sphere model. The vibrational relaxation is considered separately from the rotational relaxation and a generalized acceptance-rejection method is suggested to realize the sampling according to the singular distributions. The inelastic collision numbers are determined in accordance with the relaxation times obtained experimentally, a satisfactory simulation for the dissociation coupled with rotational and vibrational excitation is realized.
出处
《空气动力学学报》
CSCD
北大核心
1991年第1期1-7,共7页
Acta Aerodynamica Sinica
基金
中国自然科学基金 928801-6
关键词
内自由度激发
离解反应
统计模拟
excitation of internal degrees of freedom, dissociation,direct simulation Monte-Carlo method.
