CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2020, Vol. 37 ›› Issue (2): 140-152.DOI: 10.19596/j.cnki.1001-246x.8031

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An ADRS Approximated Riemann Solver in Compatible Lagrangian Method

LIU Yan1, MAO Dekang2   

  1. 1. Institute of Applied Physics and Computational Mathematics, Beijing 100094, China;
    2. Department of Mathematics, Shanghai University, Shanghai 200444, China
  • Received:2018-12-23 Revised:2019-04-23 Online:2020-03-25 Published:2020-03-25

Abstract: Analyzing advantages and disadvantages of three Riemann solvers of AC(Acoustic), MFCAV(Multi Fluid Channel on Averaged Volume) and HLLC for compressible multimaiterial fluid problems, we constructed an adaptive Riemann solver(ADRS) as a weighted average of three solvers. Rule for designing weights is discussed in detail. ADRS Riemann solver is applied to a compatible cell-centered Lagrangian method which resisting spurious mesh deformation by viewing MFCAV as a modification of AC solver. Numerical examples include Taylor Green vortex problem are given to show efficiency of the method.

Key words: cell-centered Lagrangian method, staggered Lagrangian method, approximate Riemann solver

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