论文标题
基于粒子的ESBGK方法中的多种物种模型
Multi-species modeling in the particle-based ESBGK method for monatomic gas species
论文作者
论文摘要
多种物种建模是针对开源等离子体仿真套件PICLAS中基于粒子的椭圆形统计Bhatnagar-krook（ESBGK）的椭圆形统计bhatnagar-krook（ESBGK）。在对动力学模型方程的可用多物种扩展进行了文献综述之后，确定了运输系数的方法，Brull的模型是为前者实施的，而Wilke的混合规则和后者的碰撞积分。通过三个模拟测试案例对实现进行了验证：简单的储层，超音速COUETTE流以及围绕70美元$^{\ CRICT} $钝锥的高音流动。将仿真结果与直接模拟蒙特卡洛（DSMC）方法进行了比较，该方法可以实现良好的总体一致性。但是，通过碰撞积分来确定运输系数，以可接受的计算成本提供了与DSMC结果更好的一致性。对于上一个测试案例，提出了计算持续时间的比较。
Multi-species modeling is implemented for the particle-based ellipsoidal statistical Bhatnagar-Gross-Krook (ESBGK) for monatomic species in the open-source plasma simulation suite PICLas. After a literature review on available multi-species extensions of the kinetic model equations and approaches for the determination of the transport coefficients, Brull's model is implemented for the former and Wilke's mixing rules and collision integrals for the latter. The implementation is verified with three simulation test cases: a simple reservoir, a supersonic Couette flow and the hypersonic flow around a 70$^{\circ}$ blunted cone. The simulation results are compared with the Direct Simulation Monte Carlo (DSMC) method, where good overall agreement can be achieved. However, the determination of the transport coefficients through collision integrals offers better agreement with the DSMC results at acceptable computational cost. For the last test case, a comparison of the computational duration is presented.
