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arXiv 1906.01544math.NAcs.NA
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一种求解二维粘性耦合Burgers方程的新型三级时间分裂MacCormack方法

A Novel Three-Level Time-Split MacCormack Method for Solving Two-Dimensional Viscous Coupled Burgers Equations

Eric Ngondiep

AI总结:

提出一种三级时间分裂MacCormack方法求解二维粘性耦合Burgers方程,通过算子分裂降低计算成本,在低雷诺数下实现时间二阶、空间四阶精度,高雷诺数下时间空间均二阶收敛,并通过数值算例验证了其有效性。

摘要:

本文分析了在给定初始条件和边界条件下,二维粘性耦合Burgers方程数值求解中的三级显式时间分裂MacCormack过程。微分算子将二维问题分解为两个子问题,使得两步显式MacCormack格式可以简便地应用于每个子问题,从而降低了算法的计算成本。对于低雷诺数问题,所提方法在时间上具有二阶精度,在空间上具有四阶收敛性;而对于高雷诺数问题,该方法在时间和空间上均具有二阶收敛性。与文献中广泛研究的求解二维时间依赖非线性耦合Burgers方程的大量数值格式相比,这显示了所考虑方法的效率和有效性。文中给出并讨论了验证理论结果的数值算例。

英文摘要:

In this paper, we analyze the three-level explicit time-split MacCormack procedure in the numerical solutions of two-dimensional viscous coupled Burgers' equations subject to initial and boundary conditions. The differential operators split the two-dimensional problem into two pieces so that the two-step explicit MacCormack scheme can be easily applied to each subproblem. This reduces the computational cost of the algorithm. For low Reynolds numbers, the proposed method is second order accurate in time and fourth convergent in space, while it is second order convergent in both time and space for high Reynolds numbers problems. This shows the efficiency and effectiveness of the considered method compared to a large set of numerical schemes widely studied in the literature for solving the two-dimensional time dependent nonlinear coupled Burgers' equations. Numerical examples which confirm the theoretical results are presented and discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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