三温方程的分裂格式方法在紧凑等离子体环碰撞研究中的应用

Splitting scheme of tri-temperature equations in studyingthe collision problems of the compact plasma toroid

从Lagrange观点出发,采用分裂格式法求解一维辐射流体力学方程组中的三温方程,用于紧凑等离子体环与靶碰撞产生的X射线辐射的数值模拟研究。提出了求解电子、离子、辐射场三温相脱离的能量方程的隐式差分格式,介绍了能量交换项与压力做功及热传导项分开计算的分裂格式方法,数值模拟得到了其对温度变化的影响。

The 1-D RHD tri-temperature equations, which are critical to the numerical studies of x-ray emission caused by the collision between compact plasma toroid and ideal wall, are formulated and solved from the Lagrange viewpoint and by using the splitting scheme. The implicit method is adopted to solve the electron ion and photon temperature equations, the splitting scheme is applied to separate the energy-exchange term from others, and then effects on temperatures are investigated.