界面捕捉中耦合Level-set与VOF算法

摘要

In this paper, we proposed a coupled level- set and VOF (Volume of Fluid) method (CLS-VOF) to overcome the weakness of mass loss in traditional level- set method.This algorithm preserves good characteristic of the smooth on interface in level- set method as well as the high conservation property in VOF approach.A 5th order WENO (Weighted Essentially Non- Oscillatory) was employed to dis-cretize the spacial term,while Gueyffier's interface construction method was used for the VOF transport e-quation.Test cases in 3D have shown the algorithm in this paper made an obvious improvement in the conservation property of level- set method.%针对传统的level- set方法在处理界面问题时守恒性差的缺点,提出了一种耦合level- set方法和VOF方法的算法(CLSVOF).不仅保持了level-set界面光滑性好的特点,还结合了VOF高守恒性的优点.Level-set方程的求解采用五阶WENO格式,而VOF的体积分数输运方程采用Gueyffier的界面重构方法求解.三维数值计算结果表明这种耦合算法对level- set的守恒性有明显的改善.