A simple weak formulation for solving two-dimensional diffusion equation with local reaction on the interface

A simple weak formulation for solving two-dimensional diffusion equation with local reaction on the interface
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求解界面上局部反应的二维扩散方程的简单弱公式

DOI:
10.1016/j.camwa.2017.11.003
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发表时间:
2017-11
影响因子:
2.9
通讯作者:
Shi Liwei
Shi Liwei
中科院分区:
数学2区
文献类型:
--
作者:
Wang Liqun;Hou Songming;Shi Liwei

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在本文中,我们提出了一种求解界面处具有非齐次跳跃条件和非线性通量跳跃条件的二维扩散方程的数值方法。我们使用有限元方法结合牛顿法来处理跳跃条件并对系统进行线性化。它很容易实现。这里使用的网格是基于半笛卡尔网格思想的贴身网格。数值实验表明该方法在L∞范数下具有接近二阶的精度。
In this paper, we propose a numerical method for solving two-dimensional diffusion equation with nonhomogeneous jump condition and nonlinear flux jump condition located at the interface. We use finite element method coupled with Newton’s method to deal with the jump conditions and to linearize the system. It is easy to implement. The grid used here is body-fitting grids based on the idea of semi-Cartesian grid. Numerical experiments show that this method is nearly second order accurate in the L∞ norm.
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