A Conservative Modification to the Ghost Fluid Method for Compressible Multiphase Flows
Wei Liu 1, Li Yuan 1, Chi-Wang Shu 2*1 Institute of Computational Mathematics and Scientific/Engineering Computing, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China.
2 Division of Applied Mathematics, Brown University, Providence RI 02912, USA.
Received 20 December 2009; Accepted (in revised version) 16 October 2010
Available online 13 June 2011
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.AMS subject classifications: 76M20, 76T99
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Key words: WENO scheme, ghost fluid method (GFM), mass conservation, multiphase flow.
Email: firstname.lastname@example.org (W. Liu), email@example.com (L. Yuan), firstname.lastname@example.org (C.-W. Shu)