对流换热边界条件下球体内固液相变过程移动热源法求解

Solving Solid-Liquid Phase Change Process in Sphere Under Convective Heat Transfer Boundary Conditions by Moving Heat Sources Method

应用移动热源法求解了对流换热条件下球体内具有明显相变界面的固液相变问题,分析了球体半径、相变材料潜热、外界对流换热条件对相变过程的影响,并进一步考虑实际相变过程存在的变对流边界条件,构造了一实用解法.为求解相变问题的数值方法提供了一校核其可靠性的新途径,还为实验结果提供了相互比较的数据.

The solid liquid phase change process in sphere with moving interface was solved using moving heat sources method in convective boundary conditions. The influences of the radius of sphere, the latent heat of material and the convective conditions on phase change process were analyzed. Considering the variational convective conditions in real solid liquid phase change process, a feasible solution is constructed. This solution can be used to validate numerical method and to present necessary comparable data for the experimental results. The method and the calculated results have important practical values for the design and applicationof phase change materials.