Abstract
For differential equations with multiple order spatial derivatives, there are some shortcomings by the classical high order compact (HOC) discretization. At least one of them is reducing the computational efficiency due to the multiple inverse manipulation of matrices. This motivates us to design a new kind of compact method what is called combined high order compact methods. The basic idea lying in this kind of method is to solve all the spatial derivatives simultaneously. Then, it is used to solve coupled nonlinear Schrödinger (CNLS) equations which contain both the first and second order derivatives. This scheme is not only more compact and accurate than standard HOC scheme and standard finite difference method with the same order, but also it can construct structure-preserving schemes. It preserves the symplectic structure and mass, and sometimes energy and momentum. Numerical experiments indicate that the new scheme can simulate the CNLS equations very accurately and efficiently. The mass and momentum are exactly preserved. The energy is preserved in some especially cases.
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Funding
This work was supported by the NNSFC (Nos. 11961036, 12201263, 11972121), the Jiangxi Provincial Natural Science Foundation (Nos. 20224ACB201001, 20224ACB218001), the Natural Foundation from the Educational Department of Jiangxi Province (Nos. GJJ200310), the Growing Project for Young Science and Technology Talents of Educational Department of Guizhou Province (No. KY[2022]317), the Fundamental Research Project for Natural Science of Guizhou Province (No. ZK[2022]218)
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Wang, L., Kong, L., Chen, M. et al. Structure-Preserving Combined High-Order Compact Schemes for Multiple Order Spatial Derivatives Differential Equations. J Sci Comput 96, 8 (2023). https://doi.org/10.1007/s10915-023-02219-0
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DOI: https://doi.org/10.1007/s10915-023-02219-0
Keywords
- Combined high order compact schemes
- Computational efficiency
- Coupled nonlinear Schrödinger equations
- Conservation laws
- Structure-preserving scheme