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基于焓法模型导出了一种求解等温相变问题的简单计算模型.计算模型将温度场与液相分数场进行解耦,即可分别求解出相变控制体和非相变控制体的温度;以长方体容器为例,用计算模型进行计算并将计算结果与实验数据及焓法计算结果进行对比验证,结果吻合的很好;利用计算模型,对长方体容器和圆柱体容器内相变材料熔化时间进行数值计算比较.结果表明,在容器体积和特征尺寸相同的条件下,长方体容器内相变材料的熔化时间几乎只有圆柱体容器的一半.
Based on the enthalpy method, a simple calculation model for solving the isothermal phase transformation problem is derived. The calculation model decouples the temperature field from the liquid fraction field to obtain the temperature of the phase change control body and the non-phase change control body separately. Taking a rectangular parallelepiped container as an example, a calculation model was used to calculate and compare the calculated results with the experimental data and the enthalpy method. The calculated results are in good agreement. The melting time of the phase change material in the container The numerical results show that the phase change material in the rectangular parallelepiped container can melt almost half of that of the cylindrical container under the same container volume and feature size.