A Self-Adaptive Numerical Method to Solve Convection-Dominated Diffusion Problems
A Self-Adaptive Numerical Method to Solve Convection-Dominated Diffusion Problems
复制标题
求解对流主导扩散问题的自适应数值方法
DOI:
10.1155/2017/8379609
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发表时间:
2017
影响因子:
--
通讯作者:
Wang Xiao-Hong
中科院分区:
文献类型:
--
作者:
Cao Zhi-Wei;Liu Zhi-Fan;Liu Zhi-Feng;Wang Xiao-Hong
Convection-dominated diffusion problems usually develop multiscaled solutions and adaptive mesh is popular to approach high resolution numerical solutions. Most adaptive mesh methods involve complex adaptive operations that not only increase algorithmic complexity but also may introduce numerical dissipation. Hence, it is motivated in this paper to develop an adaptive mesh method which is free from complex adaptive operations. The method is developed based on a range-discrete mesh, which is uniformly distributed in the value domain and has a desirable property of self-adaptivity in the spatial domain. To solve the time-dependent problem, movement of mesh points is tracked according to the governing equation, while their values are fixed. Adaptivity of the mesh points is automatically achieved during the course of solving the discretized equation. Moreover, a singular point resulting from a nonlinear diffusive term can be maintained by treating it as a special boundary condition. Serval numerical tests are performed. Residual errors are found to be independent of the magnitude of diffusive term. The proposed method can serve as a fast and accuracy tool for assessment of propagation of steep fronts in various flow problems.
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DOI:
10.1137/s003614290138471x
发表时间:
2001-04
期刊:
SIAM J. Numer. Anal.
影响因子:
--
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通讯作者:
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影响因子:
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影响因子:
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通讯作者:
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影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
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期刊:
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影响因子:
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通讯作者:
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