A Comparison of the Ghost Cell Technique for Front Tracking Method

Donghong Wang, Yanqing Wang, Ning Zhao

College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, China.
College of Science, PLA University of Science and Technology, Nanjing, China.

DOI: 10.4236/ojfd.2013.33021                

Abstract

The treatment of moving material interfaces and their vicinity is very important for compressible multifluids. In this paper, we propose one type of ghost fluid method based on Riemann solutions for front tracking method. The accuracy of the interface boundary condition is discussed for the gas-gas Riemann problem. It is shown that the solution of the ghost fluid method approximates the exact solution to second-order accuracy in the sense of comparing to the exact solution of a Riemann problem at the material interface. Numerical examples suggest that the present scheme is able to handle multifluids problems with large density differences and has the property of reduced conservation error.

Keywords

Compressible Multifluid; Front Tracking Method; Riemann Problem

Conflicts of Interest

The authors declare no conflicts of interest.

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