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Richtmyer-Meshkov (RM) instability arises when a material interface is accelerated impulsively by shock waves. In this work, an arbitrary Lagrangian-Eulerian method, global ALE method, was proposed for the simulation of stratified RM instability. In the global ALE method, an Eulerian diffusion interface model was implemented based on mass fraction function.… (More)
In this paper, we develop an approach to stably apply the Riemann solvers without an acoustic form to the Maire's node-based Lagrangian scheme developed in (P. H. Maire, R. Abgrall, J. Breil, et al, A cell-centered lagrangian scheme for multidimensional compressible ow problems, SIAM J. Sci. Comput, 2007, 29, 1781-1824). We apply the Dukowicz , HLLC… (More)
In order to accelerate the iterative convergence, the multigrid algorithm for the 3D time-dependent neutron transport difference equation is studied in this paper. The detail description for this algorithm and the processes of the implementation are given, and the comparison and conclusion for the numerical results are listed.