Association Journal of CSIAM
Supervised by Ministry of Education of PRC
Sponsored by Xi'an Jiaotong University
ISSN 1005-3085  CN 61-1269/O1

Chinese Journal of Engineering Mathematics ›› 2023, Vol. 40 ›› Issue (3): 425-438.doi: 10.3969/j.issn.1005-3085.2023.03.007

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Improved High Order Weighted Compact Nonlinear Difference Scheme

LI Xiaogang1,  WANG Jianling2,  HU Weiyi1,  WANG Wenshuai3   

  1. 1. School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021
    2. College of Information Engineering, Yinchuan University of Science and Technology, Yinchuan 750021
    3. School of Mathematics and Statistics, Ningxia University, Yinchuan 750021
  • Received:2021-02-25 Accepted:2022-05-16 Online:2023-06-15 Published:2023-08-15
  • Contact: W. Wang. E-mail address: wws@nxu.edu.cn
  • Supported by:
    The National Natural Science Foundation of China (42064004; 12161067); the Natural Science Foundation of Ningxia (2022AAC03070).

Abstract:

Based on the fourth- and sixth-order central compact schemes with tridiagonal coefficient matrix, the fourth- and fifth-order weighted compact nonlinear difference schemes are obtained for solving hyperbolic conservation law equations, the function values of half-node are interpolated with the nonlinear combination of the fifth-order WENO difference scheme of large template and two small symmetrical templates. The computational accuracy and efficiency of the new scheme are verified by the results of linear convection equation. The resolution of the new scheme is verified by the results of one-dimensional inviscid Burgers equation. The ability of the new scheme to capture the shock discontinuity in nonlinear problems is verified by one - and two-dimensional Euler equations. The numerical experiments show that the proposed scheme is an efficient, high-order and high-resolution shock capturing scheme.

Key words: weighted compact, nonlinear difference scheme, global smoothness indicator

CLC Number: