界面追踪法求解半空间双相Stefan问题  

An approach to semi-space two-phase Stefan problemsby using interface-tracking and analysis method

作　　者：吴兆春[1] 

机构地区：[1]上海应用技术学院环境与能源工程系,上海200235

出　　处：《哈尔滨商业大学学报（自然科学版）》2004年第1期59-62,共4页Journal of Harbin University of Commerce：Natural Sciences Edition

摘　　要：提出了一种定时间步长,以计算得到的移动界面位置作为网格节点且前后界面位置之差为空间步长(非等距)的界面追踪差分方式,用于凝固或融解过程的相变传热问题的计算.该方法在计算过程中能自动地逐步形成网格的划分.采用与分析解相结合的方法,对双相凝固问题进行了求解.与定壁温条件下的理论解对比,表明该方法的计算结果与理论解相吻合.Presented a approach to semi-space,two-phase Stefan problems by using interface-tracking and analysis method. In fixed and equal time steps, taking the positions of moving interface obtained from computation as the grid points, and the difference between them as the space steps,formed mesh in computational domain automatically and gradually. Through calculating the temperature of grid points, obtained moving interface of next time step. By comparison with the analytic solution on the boundary condition of constant wall temperature, it showed that the results of computation are agreement with analytic solution well.

关 键 词：界面追踪法 STEFAN问题 数值差分 分析解 网格划分 双相凝固 相变传热 

分 类 号：TK121[动力工程及工程热物理—工程热物理]