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所属单位：理学院
发表刊物：NUMERICAL METHODS FOR PARTIAL DIFFERENTIAL EQUATIONS
关键字：finite difference framework Hamilton-Jacobi equation weighted essentially non-oscillatory scheme
摘要：In this continuing paper of (Zhu and Qiu, J Comput Phys 318 (2016), 110-121), a new fifth order finite difference weighted essentially non-oscillatory (WENO) scheme is designed to approximate the viscosity numerical solution of the Hamilton-Jacobi equations. This new WENO scheme uses the same numbers of spatial nodes as the classical fifth order WENO scheme which is proposed by Jiang and Peng (SIAM J Sci Comput 21 (2000), 2126-2143), and could get less absolute truncation errors and obtain the same order of accuracy in smooth region simultaneously avoiding spurious oscillations nearby discontinuities. Such new WENO scheme is a convex combination of a fourth degree accurate polynomial and two linear polynomials in a WENO type fashion in the spatial reconstruction procedures. The linear weights of three polynomials are artificially set to be any random positive constants with a minor restriction and the new nonlinear weights are proposed for the sake of keeping the accuracy of the scheme in smooth region, avoiding spurious oscillations and keeping sharp discontinuous transitions in nonsmooth region simultaneously. The main advantages of such new WENO scheme comparing with the classical WENO scheme proposed by Jiang and Peng (SIAM J Sci Comput 21 (2000), 2126-2143) are its efficiency, robustness and easy implementation to higher dimensions. Extensive numerical tests are performed to illustrate the capability of the new fifth WENO scheme. (c) 2016 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 33: 1095-1113, 2017
ISSN号：0749-159X
是否译文：否
发表时间：2017-07-01
合写作者：Qiu, Jianxian
通讯作者：Qiu, Jianxian,朱