Communications on Applied Mathematics and Computation ›› 2024, Vol. 6 ›› Issue (4): 2048-2063.doi: 10.1007/s42967-023-00298-2

• ORIGINAL PAPERS • Previous Articles     Next Articles

Hyperbolic Conservation Laws, Integral Balance Laws and Regularity of Fluxes

Matania Ben-Artzi1, Jiequan Li2,3   

  1. 1 Institute of Mathematics, Hebrew University of Jerusalem, Jerusalem 91904, Israel;
    2 Academy for Multidisciplinary Studies, Capital Normal University, Beijing 100048, China;
    3 State Key Laboratory for Turbulence Research and Complex System, Peking University, Beijing 100871, China
  • Received:2023-05-30 Revised:2023-07-08 Accepted:2023-07-09 Published:2024-12-20
  • Contact: Matania Ben-Artzi,E-mail:mbartzi@math.huji.ac.il;Jiequan Li,E-mail:jiequan@cnu.edu.cn E-mail:mbartzi@math.huji.ac.il;jiequan@cnu.edu.cn

Abstract: Hyperbolic conservation laws arise in the context of continuum physics, and are mathematically presented in differential form and understood in the distributional (weak) sense. The formal application of the Gauss-Green theorem results in integral balance laws, in which the concept of flux plays a central role. This paper addresses the spacetime viewpoint of the flux regularity, providing a rigorous treatment of integral balance laws. The established Lipschitz regularity of fluxes (over time intervals) leads to a consistent flux approximation. Thus, fully discrete finite volume schemes of high order may be consistently justified with reference to the spacetime integral balance laws.

Key words: Balance laws, Hyperbolic conservation laws, Finite volume approximations, Flux regularity, Consistency