Discrete maximum principle based on repair technique for diamond type scheme of diffusion problems

Discrete maximum principle based on repair technique for diamond type scheme of diffusion problems
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基于离散极大值原理的扩散问题菱形格式修复技术

DOI:
10.1002/fld.2746
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发表时间:
2012-11
影响因子:
1.8
通讯作者:
Sheng,Zhiqiang
Sheng,Zhiqiang
中科院分区:
工程技术4区
文献类型:
--
作者:
Li,Yonghai;Yuan,Guangwei;Wang,Shuai;Sheng,Zhiqiang

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本文对各向异性扩散问题的钻石格式提出了两种修复技术,以确保修复后的解满足离散极大值原理。其中之一是[Liska R,Shashkov M.]中关于二阶椭圆型问题线性有限元解的离散极大值原理的推广。《计算物理通讯》2008;3(4):852-877。]对于线性有限元解,这是一种局部修复技术,另一种是一种新的全局修复技术。它们都保持了总的能量节约,并且很容易在现有的规范中实施。数值算例表明,这两种修复技术不会破坏变形网格上钻石格式的求解精度。版权所有©2012 John Wiley&Sons,Ltd.
In this paper, two repair techniques are proposed for diamond schemes of anisotropic diffusion problems to ensure that the repaired solutions satisfy the discrete maximum principle. One of them is an extension of that in [Liska R, Shashkov M. Enforcing the discrete maximum principle for linear finite element solutions of second‐order elliptic problems. Communications in Computational Physics 2008; 3(4):852–877.] for linear finite element solutions, which is a local repair technique, and another is a new global repair technique. Both of them keep total energy conservation and are easy to be implemented in existing codes. Numerical examples show that these two repair techniques do not destroy the accuracy of solution for the diamond schemes on distorted meshes. Copyright © 2012 John Wiley & Sons, Ltd.
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