追踪不可压缩两相流相界面的CLSVOF方法

Computation of Incompressible Two-phase Flows by Using CLSVOF Method

根据CLSVOF方法的基本思想,将VOF和Level Set两种方法结合起来,用于追踪不可压缩两相流相界面的计算。通过对经典的两相流流动问题的计算,研究了CLSVOF方法对对流输运方程和动量输运方程计算精度的影响,并与VOF方法和Level Set方法进行了对比。研究结果表明:求解对流输运方程时,CLSVOF方法的计算精度明显高于Level Set方法;求解动量输运方程时,CLSVOF方法产生的虚假速度接近于0,基本克服了利用VOF方法求解动量输运方程时的虚假速度势问题。

The CLSVOF method which combined the VOF method and Level Set method was put forward to compute the flow of incompressible two-phase.The precision of the CLSVOF method for computing the convection transport and momentum transport equation was studied and the comparison was made between the VOF method and Level Set method by using some classical two-phase flows.The results show when computing the convection transport equation,the CLSVOF method has much better precision than the Level Set method;and when computing the momentum transport equation,the CLSVOF method can avoid the problem of spurious velocity current which can not be avoided by using the VOF method.