Assessment of direct simulation Monte Carlo phenomenological rotational relaxation models
Assessment of direct simulation Monte Carlo phenomenological rotational relaxation models
复制标题
直接模拟蒙特卡罗唯象旋转松弛模型的评估
DOI：
10.1063/1.869818
复制
发表时间：
1998
影响因子：
4.6
通讯作者：
D. C. Wadsworth
中科院分区：
文献类型：
--
作者：
I. Wysong;D. C. Wadsworth
我们解决直接模拟蒙特卡罗（DSMC）实现的旋转弛豫过程的唯象模型适用于任意的气体混合物组成的原子和量子化的双原子物种。宏观弛豫过程由常数或与温度相关的碰撞数Zr来参数化，例如帕克的[物理流体2，449（1959）]。这样的模型预测的能量再分配属性在碰撞水平进行比较，最近的准经典状态到状态模型。修正形式的恒定碰撞数，从而恒定松弛概率，串行量化Borgnakke-Larsen算法[物理流体A 5，2278（1993）]和零碰撞SICS-D算法[物理流体A 4，1782（1992）]被证明是等效的。由于分析公式中固有的近似，对能量依赖的弛豫概率[Phys. Fluids 6，4042（1994）]的概括导致了对延迟弛豫的系统性偏差。The error ind...
We address direct simulation Monte Carlo (DSMC) implementation of phenomenological models of the rotational relaxation process suitable for an arbitrary gas mixture composed of atomic and quantized diatomic species. The macroscopic relaxation process is parametrized by a constant or temperature-dependent collision number Zr such as that of Parker [Phys. Fluids 2, 449 (1959)]. The energy redistribution properties predicted by such a model at the collision level are compared with a recent quasiclassical state-to-state model. Modified forms of the constant collision number, and thus constant relaxation probability, serial quantized Borgnakke–Larsen algorithm [Phys. Fluids A 5, 2278 (1993)] and the null collision SICS-D algorithm [Phys. Fluids A 4, 1782 (1992)] are shown to be equivalent. The generalization to an energy-dependent relaxation probability [Phys. Fluids 6, 4042 (1994)] leads to a systematic bias toward delayed relaxation, due to approximations inherent in the analytical formulation. The error ind...