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首页> 外文期刊>Zeitschrift fur Angewandte Mathematik und Mechanik >Combined triangular FV-triangular FE method for nonlinear convection-diffusion problems
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Combined triangular FV-triangular FE method for nonlinear convection-diffusion problems

机译:非线性对流扩散问题的组合三角FV-三角有限元方法

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摘要

The paper is concerned with the analysis of the combined finite element - finite volume method for the solution of nonstationary nonlinear convection-diffusion problems. Here a special version of this technique is analyzed, combining conforming piecewise linear triangular elements, used for the discretization of diffustion terms, with triangular finite volumes for the approximation of nonlinear convective terms. The finite volume and finite element meshes have to be of the same size, but their shape can be practically independent. In the paper, the error estimates of this method are proven under the assumptions that the finite element meshes are shape regular, the size of the finite element and finite volume meshes are equivalent and the exact solution is sufficiently regular. Theoretical analysis is accompanied by numerical experiments, showing the optimality of the derived error estimates.
机译:本文涉及分析非平稳非线性对流扩散问题的有限元-有限体积组合方法的分析。在此分析了该技术的一种特殊形式,将用于扩散项离散化的分段线性线性三角形元素与用于非线性对流项近似的三角形有限体积相结合。有限体积网格和有限元网格必须具有相同的大小,但是它们的形状实际上可以独立。在本文中,该方法的误差估计是在以下条件下证明的:有限元网格是规则形状的,有限元的大小和有限体积网格是等效的,并且精确的解决方案是足够规则的。理论分析伴随着数值实验,显示了导出误差估计的最优性。

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