| 具有对流边界的相变导热问题的焓法有限元解 |
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| 引用本文： | 王洪海,周昆颖,陈罕. 具有对流边界的相变导热问题的焓法有限元解[J]. 北京化工大学学报(自然科学版), 1993, 0(2) |
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| 作者姓名： | 王洪海 周昆颖 陈罕 |
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| 作者单位： | 北京化工学院机械工程系,北京化工学院机械工程系,北京化工学院机械工程系 北京东方化工厂 |
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| 摘 要： | 引用焓计算单元和固相分数两个概念,利用有限元离散焓方程对具有对流边界条件的一维相变导热问题作了讨论。所有参数均以无量纲形式给出。计算结果表明,当Ste(斯蒂分数)>0.2时,无论是相变界面,还是温度随时间的变化曲线均消除了传统焓法求解相变问题时常见的台阶状波动。
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| 关 键 词： | 传热 相变 焓法 有限元法 |
Enthalpy FEM for Phase Change Problems with Convective Boundary Condition |
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| Wang Honghai Zhou Kunying Chen Han. Enthalpy FEM for Phase Change Problems with Convective Boundary Condition[J]. Journal of Beijing University of Chemical Technology, 1993, 0(2) |
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| Authors: | Wang Honghai Zhou Kunying Chen Han |
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| Affiliation: | Department of Mechanical Engineering |
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| Abstract: | The enthalpy method combined with finite element discretization eliminates the common staircase like oscillations on interfacc-time curves in traditional enthalpy methods for the solution of phase change problems by adopting two concepts, the "enthalpy calculating cell" and the "fraction solid". It is valid for phase change problems of two different kinds of boundary conditions. All parameters used are given in nondimensional forms to facilitate the discussion about the influcnce of Bi and Ste on such problems. |
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| Keywords: | heat transfer phase change enthalpy method finite element method(FEM) |
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