| 用焓法有限元解相变问题的离散化方法 |
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| 引用本文： | 陈罕,周昆颖,李守杰.用焓法有限元解相变问题的离散化方法[J].北京化工大学学报(自然科学版),1992(3). |
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| 作者姓名： | 陈罕 周昆颖 李守杰 |
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| 作者单位： | 北京化工学院机械工程系
(陈罕,周昆颖),北京化工学院机械工程系(李守杰) |
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| 摘 要： | 为了消除应用焓法进行含有相变的有限元传热计算结果呈台阶形的现象,本文作者提出“焓计算单元”和“固相分数”的概念,并将几种一维有限元实施方案的计算结果与精确解对比,说明采用所提出的概念,可以使有限元计算得出更为合理的结果。
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| 关 键 词： | 有限元法 数值模拟 传热 相变 |
Discretization of the Enthalpy FEM for Phase Change Problems |
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| Chen Han,Zhou Kunying,Li Shoujie.Discretization of the Enthalpy FEM for Phase Change Problems[J].Journal of Beijing University of Chemical Technology,1992(3). |
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| Authors: | Chen Han Zhou Kunying Li Shoujie |
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| Institution: | Chen Han;Zhou Kunying;Li Shoujie Department of Mechanical Engineering |
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| Abstract: | An enthalpy FEM based on the "fraction solid",and "enthalpy calculating ele-ment" concepts is proposed for the solutions of one-dimensional problems of heat conduc-tion with phase change at fixed temperature in order to remove numerical oscillations intemperature and phase front position. Several schemes and numerical results ofsolidification problems with known analytical solutions are applied to demonstrate the ef-fect of the schemes. |
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| Keywords: | FEM(finite element methods) numerical simulation heat transfer phase transformations |
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