【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。更多还原

【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.更多还原