UF₆ gas flow in the total regions of a rotor with the radius of 0.1 m and the length of 1 m in axisymmetric and steady states was simulated using a new hybrid CFD-DSMC method in the OpenFOAM framework. Implicit coupled density-based scheme was performed for CFD method, and Variable Hard Sphere (VHS) and diffuse model were employed in DSMC method. Also, as an initial estimation, the local Knudsen number was applied to determine the interface location between the continuum-rarefied regions (r = 0.0855 m). Then it was modified (r = 0.084 m) to reduce the computational cost. The comparison results of pure CFD and CFD-DSMC methods illustrated that there were large differences between the flow properties in the rarefied regions. Finally, the results showed that the separation factor of 6.5% and the separation power of 9.5% were different.

超滤₆在OpenFOAM框架中使用新的混合CFD-DSMC方法模拟了轴对称和稳态下半径为0.1 m，长度为1 m的转子整个区域中的气体流动。CFD方法采用基于隐式耦合密度的方案，DSMC方法采用可变硬球体（VHS）和扩散模型。同样，作为初始估计，使用局部克努森数确定连续提升区域之间的界面位置（r = 0.0855 m）。然后对其进行修改（r = 0.084 m）以减少计算成本。纯CFD和CFD-DSMC方法的比较结果表明，稀薄区域的流动特性之间存在很大差异。最后，结果表明分离系数为6.5％，分离力为9.5％。