| 二维非定常自然对流问题的特征—有限元算法 |
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| 引用本文： | 王同科 吉鸿威. 二维非定常自然对流问题的特征—有限元算法[J]. 河南师范大学学报(自然科学版), 1997, 25(2): 74-77 |
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| 作者姓名： | 王同科 吉鸿威 |
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| 作者单位： | 河南师范大学数学系 |
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| 摘 要： | 本文给出了方腔中二维自然对流问题的特征—有限元算法，由于对流项沿特征线离散，既保证了计算格式的无条件稳定性，又可以使用较大的时间步长，并且求解微分方程组时，在总体上实行迭代，一定程度上提高了计算精度
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| 关 键 词： | 特征—有限元算法；对流—扩散方程；自然对流问题 |
Finite Element Method Combined With a Modified Method of Characteristics for Two-dimensional Unsteady Natural Convection Problems in a Square Cavity |
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| Wang Tongke Shen Peiping Ji HongweiXinxiang Agricultural Mechanization School. Finite Element Method Combined With a Modified Method of Characteristics for Two-dimensional Unsteady Natural Convection Problems in a Square Cavity[J]. Journal of Henan Normal University(Natural Science), 1997, 25(2): 74-77 |
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| Authors: | Wang Tongke Shen Peiping Ji HongweiXinxiang Agricultural Mechanization School |
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| Abstract: | This paper gives the finite element method combined with a modified method of characteristics for two-dimensional transient natural convection problems.Because convection term is discretized along characteristics,the calculating scheme is not only stable ,but also permit to use larger time steps ,furthermore ,the overall iteration is used when the differential equations are solved ,so that the accuracy of the result may be improved to some extent. |
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| Keywords: | finite element method modified method of characteristics convection-diffusion equation natural convection problem |
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