Solving Poisson equation with Robin boundary condition on a curvilinear mesh using high order mimetic discretization methods

Solving Poisson equation with Robin boundary condition on a curvilinear mesh using high order mimetic discretization methods
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使用高阶模拟离散化方法求解曲线网格上具有 Robin 边界条件的泊松方程

DOI:
10.1016/j.matcom.2014.10.004
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发表时间:
2017
影响因子:
4.6
通讯作者:
Castillo, Jose E.
Castillo, Jose E.
中科院分区:
数学3区
文献类型:
--
作者:
Abouali, Mohammad;Castillo, Jose E.

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本文介绍了一个新的软件包,编写的MATLAB®,生成一个扩展的离散拉普拉斯(L= D G= D-G)的基础上的Castillo-Grone模拟差分算子在一般曲线网格。边界条件包括在扩展的离散拉普拉斯算子,即Dirichlet,Neumann,以及罗宾边界条件。用户只需要提供一个曲线网格,所需的操作顺序,和插值多项式的次数。在不同条件下对该算子进行了测试,并报告了其性能。最后,基于结果的准确性,所需的内存量,以及所需的计算,它是得出结论,四阶算子是最好的。
This paper introduces a new software package, written in MATLAB®, that generates an extended discrete Laplacian (L= D G=∇⋅∇) based on the Castillo–Grone Mimetic difference operators over a general curvilinear grid. The boundary conditions are included in the extended discrete Laplacian Operator, ie Dirichlet, Neumann, as well as Robin boundary conditions. The user only needs to provide a curvilinear grid, a desired operator order, and the degree of the interpolating polynomial. The operator is tested in different condition and its performance is reported. Finally, based on accuracy of the results, amount of required memory, and the computation that is needed, it is concluded that the 4th order operator is the best one.
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