A linearly implicit conservative difference scheme for the generalized Rosenau-Kawahara-RLW equation

A linearly implicit conservative difference scheme for the generalized Rosenau-Kawahara-RLW equation
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广义Rosenau-Kawahara-RLW方程的线性隐式保守差分格式

DOI:
10.1016/j.amc.2015.09.021
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发表时间:
2015-09
影响因子:
4
通讯作者:
Pan Kejia
Pan Kejia
中科院分区:
数学2区
文献类型:
--
作者:
He Dongdong;Pan Kejia

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将广义Rosenau-Kawahara-RLW方程与广义Rosenau-Kawahara方程耦合得到广义Rosenau-Kawahara-RLW方程。我们首先推导了方程的能量守恒定律,然后发展了一个求解方程的三层线性隐式差分格式。我们证明了所提出的方案是能量守恒的,无条件稳定的和二阶精度的时间和空间变量。最后通过数值实验验证了该格式的能量守恒性、收敛速度和长时间模拟的有效性。
This paper concerns the numerical study for the generalized Rosenau–Kawahara-RLW equation obtained by coupling the generalized Rosenau-RLW equation and the generalized Rosenau–Kawahara equation. We first derive the energy conservation law of the equation, and then develop a three-level linearly implicit difference scheme for solving the equation. We prove that the proposed scheme is energy-conserved, unconditionally stable and second-order accurate both in time and space variables. Finally, numerical experiments are carried out to confirm the energy conservation, the convergence rates of the scheme and effectiveness for long-time simulation.
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