1. Graduate School of China Academy of Engineering Physics, Beijing 100088, China; 2. School of Mathematics and Statistics, Nanjing University of Information Science and Technology, Nanjing 210044, China; 3. Jiangsu Key Laboratory of NSLSCS, School of Mathematical Sciences, Nanjing Normal University, Nanjing 210023, China
Abstract In this paper, we propose a local conservation law for the Zakharov system. The property is held in any local time-space region which is independent of the boundary condition and more essential than the global energy conservation law. Based on the rule that the numerical methods should preserve the intrinsic properties as much as possible, we propose a local energy-preserving (LEP) scheme for the system. The merit of the proposed scheme is that the local energy conservation law can be conserved exactly in any time-space region. With homogeneous Dirchlet boundary conditions, the proposed LEP scheme also possesses the discrete global mass and energy conservation laws. The theoretical properties are verified by numerical results.
(Ordinary and partial differential equations; boundary value problems)
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11771213) and the Startup Foundation for Introducing Talent of Nanjing University of Information Science and Technology (Grant No. 2243141701090).
Corresponding Authors:
Jia-ling Wang
E-mail: wjl19900724@126.com
About author: 02.60.Cb; 02.70.Bf; 02.60.Lj
Cite this article:
Qi Hong(洪旗), Jia-ling Wang(汪佳玲), Yu-Shun Wang(王雨顺) A local energy-preserving scheme for Zakharov system 2018 Chin. Phys. B 27 020202
[1]
Zakharov V E 1972 Sov. Phys. JETP 35 908
[2]
Hadouaj H, Malomed B and Maugin G 1991 Phys. Rev. A 44 3932
[3]
Hadouaj H, Malomed B and Maugin G 1991 Phys. Rev. A 44 3925
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