中文摘要：

本文采用双分布函数格子Boltzmann方法（DDF-LB）模拟了直流氩电弧等离子体中的流动与传热问题。针对非局域热平衡状态下热等离子体中的原子、离子和电子三种组分,推导给出了不同组分的格子Boltzmann方程,通过耦合迭代求解得到各组分的温度和速度分布。文中采用随温度变化的松弛时间用以提高数值计算的稳定性。通过将本文的计算结果与文献结果进行比较,验证了DDF-LB方法求解等离子体中能量输运问题的稳定性和数值精度。

英文摘要：

The present work is aimed to simulate the thermal and fluid dynamical behavior of direct current argon plasma by using double distribution function lattice Boltzmann method（DDF-LBM）.The plasma consists of three components（electrons,ions and atoms）,and considered to be in non-local thermodynamic equilibrium during simulation.Multi-component lattice Boltzmann equations were constructed for the flow and energy fields.Temperature-dependent rescaling coefficients were used to enhance the numerical stability of the model.Numerical performance of the DDF-LB model was then validated by comparing the present results with values calculated by the other method and experimental data.