A Numerical Simulation on Heat Transfer in Ice Melting by Using the Moving Mesh Technique

摘要

This paper is concerned with a numerical study on a typical Stefan problem by means of a moving mesh technology that can be used to validly track the moving boundary. The governing equations are discretized on the collocated grids in a body fitted coordinate by using finite volume methods. The QUICK and central differencing schemes are used for the discretization of convectional term and diffusion term respectively. The SIMPLE algorithm is employed to decouple velocities and pressure. The aim of this paper is to study the characteristics of the moving interface between the solid and liquid phases during melting process. Propagations of the temperature field and melting interface have been obtained. The changes of local Nusselt number and mean Nusselt number varied with time are presented in figures. The advantages and disadvantages of the moving mesh technique are well explained and the results demonstrate that this kind of method is effective for solving such unsteady solid-liquid phase-change problems.