A Conservative Modification to the Ghost Fluid Method for Compressible Multiphase Flows

A Conservative Modification to the Ghost Fluid Method for Compressible Multiphase Flows
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可压缩多相流幽灵流体法的保守修正

DOI:
10.4208/cicp.201209.161010a
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发表时间:
2011-10
影响因子:
3.7
通讯作者:
Chi-Wang Shu
Chi-Wang Shu
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wei Liu;Li Yuan;Chi-Wang Shu

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抽象的。针对可压缩多相流问题,对鬼流体法(GFM)进行了保守修正。其动机是在不影响其性能的情况下消除或减小GFM的守恒误差。我们跟踪材料界面附近的保守变量,并使用这些信息来修改界面单元经过单元时的数值解。该修改程序可用于具有任何基本方案的GFM。空间离散采用五阶有限差分WENO格式,时间离散采用三阶TVD Runge-Kutta方法。使用Level Set方法来捕获界面。数值实验表明,该方法至少是质量守恒和动量守恒的,在数值分辨率上与原GFM基本相当。
Abstract. A conservative modification to the ghost fluid method (GFM) is developed for compressible multiphase flows. The motivation is to eliminate or reduce the conservation error of the GFM without affecting its performance. We track the conservative variables near the material interface and use this information to modify the numerical solution for an interfacing cell when the interface has passed the cell. The modification procedure can be used on the GFM with any base schemes. In this paper we use the fifth order finite difference WENO scheme for the spatial discretization and the third order TVD Runge-Kutta method for the time discretization. The level set method is used to capture the interface. Numerical experiments show that the method is at least mass and momentum conservative and is in general comparable in numerical resolution with the original GFM.
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