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A Lions Domain Decomposition Algorithm for Radiation DiffusionEquations on Non-matching Grids

Published online by Cambridge University Press:  10 November 2015

Li Yin*
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing 100088, P. R. China
Jiming Wu
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing 100088, P. R. China
Zihuan Dai
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing 100088, P. R. China
*
*Corresponding author. Emailaddress: yinli_kitty122@sina.com (L. Yin), wu_jiming@iapcm.ac.cn(J. Wu), dai_zihuan@iapcm.ac.cn (Z. Dai)

Abstract

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We develop a Lions domain decomposition algorithm based on a cell functionalminimization scheme on non-matching multi-block grids for nonlinear radiationdiffusion equations, which are described by the coupled radiation diffusionequations of electron, ion and photon temperatures. TheL2 orthogonal projection is applied in the Robintransmission condition of non-matching surfaces. Numerical results show that thealgorithm keeps the optimal accuracy on the whole computational domain, isrobust enough on distorted meshes and curved surfaces, and the convergence ratedoes not depend on Robin coefficients. It is a practical and attractivealgorithm in applying to the two-dimensional three-temperature energy equationsof Z-pinch implosion simulation.

Information

Type
Research Article
Copyright
Copyright © Global-Science Press 2015