Original-energy-dissipation-preserving methods for the incompressible Navier-Stokes equations
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911100036972544 |
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| author | Weng, Zihan Hong, Qi Wang, Chunwu Gong, Yuezheng |
| author_facet | Weng, Zihan Hong, Qi Wang, Chunwu Gong, Yuezheng |
| contents | This paper introduces a robust reformulation of the incompressible Navier-Stokes equations, establishing a foundational framework for designing efficient, structure-preserving algorithms that strictly conserve the original energy dissipation law. By leveraging Crank-Nicolson schemes and backward differentiation formulas, we develop four first- and second-order time-discrete schemes. These schemes exactly preserve the original energy dissipation law at each time step, requiring only the solutions of three linear Stokes systems and one $2\times 2$ system of linear equations. Furthermore, the finite difference approximation on a staggered grid is employed for these time-discrete systems to derive fully discrete structure-preserving schemes. We rigorously prove that all proposed fully discrete methods both maintain the original energy dissipation law and admit unique solutions. Moreover, we present their efficient implementation. Extensive numerical experiments are carried out to verify the accuracy, efficacy, and advantageous performance of our newly developed methods. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_07141 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Original-energy-dissipation-preserving methods for the incompressible Navier-Stokes equations Weng, Zihan Hong, Qi Wang, Chunwu Gong, Yuezheng Numerical Analysis This paper introduces a robust reformulation of the incompressible Navier-Stokes equations, establishing a foundational framework for designing efficient, structure-preserving algorithms that strictly conserve the original energy dissipation law. By leveraging Crank-Nicolson schemes and backward differentiation formulas, we develop four first- and second-order time-discrete schemes. These schemes exactly preserve the original energy dissipation law at each time step, requiring only the solutions of three linear Stokes systems and one $2\times 2$ system of linear equations. Furthermore, the finite difference approximation on a staggered grid is employed for these time-discrete systems to derive fully discrete structure-preserving schemes. We rigorously prove that all proposed fully discrete methods both maintain the original energy dissipation law and admit unique solutions. Moreover, we present their efficient implementation. Extensive numerical experiments are carried out to verify the accuracy, efficacy, and advantageous performance of our newly developed methods. |
| title | Original-energy-dissipation-preserving methods for the incompressible Navier-Stokes equations |
| topic | Numerical Analysis |
| url | https://arxiv.org/abs/2506.07141 |