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运用Ｎｅｗｔｏｎ流体力学的微元法分析，通过对等离子体旋自旋自耗电极（ＰＲＥＰ）端部小熔池中液膜流动的稳态层流假设，建立了液膜中流体运动的微分方程．并运用相关边界条件，得到了该微分方程的解析解，由此得到液膜厚度的表达式．该式表明液膜厚度与等离子体电弧功率、ＰＲＥＰ直径及旋转速度存在依赖关系．通过改变这些工艺参数，进行了实验验证，结果表明，实测的液膜厚度同理论计算值符合较好。
Based on the Newton fluid mechanics micro-element analysis, the differential equation of fluid motion in the liquid film was established by the steady-state laminar flow assumption of the liquid film flow in the end small bath of plasma spin spin consumable electrode (PREP) . By using the relevant boundary conditions, the analytical solution of the differential equation is obtained, and the expression of the film thickness is obtained. The formula shows that the film thickness and the plasma arc power, PREP diameter and rotation speed dependent. By changing these process parameters, the experimental verification was carried out. The results show that the measured thickness of the liquid film is in good agreement with the theoretical calculation.