焓-多孔介质模型数值求解策略研究  

Study on the numerical resolution strategy of enthalpy-porosity model

作　　者：丁鹏[1] 杨旭[1] 魏如普 DING Peng;YANG Xu;WEI Rupu(College of New Energy,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)新能源学院,山东青岛266580

出　　处：《热科学与技术》2024年第6期587-593,共7页Journal of Thermal Science and Technology

基　　金：山东省自然科学基金资助项目(ZR2022YQ58)

摘　　要：焓-多孔介质模型是现在求解非稳态相变传热问题的主要方法,但是存在求解速度慢的缺点。讨论了非迭代时间步进(non-iterative time advancement, NITA)计算策略对求解效率及稳定性的影响,相比经典的迭代时间步进(iterative time advancement, ITA)计算策略,采用NITA法可显著缩短计算时间;通过焓-多孔介质模型与VOF模型耦合的计算方法,研究了相变材料体积膨胀因素对其相变过程传热特性的影响,验证了Boussinesq近似的合理性;探究了糊状区常数对相变过程数值模拟的影响,得到适用于研究模型的糊状区常数的取值。The enthalpy-porous medium model is the main method to solve the unsteady phase-change heat transfer problems,but it has the shortcoming of slow solving speed.The influence of the NITA(non-iterative time advancement)solution strategy on computational efficiency and stability is discussed.The results shows that the NITA strategy can shorten the computation time remarkedly compared with the classical iterative time advancement.Coupling enthalpy-porosity and VOF(volume of fluid)model,the influences of the volume expansion of the PCM(phase change material)on the heat transfer characteristics of the phase change process are studied,and the Boussinesq approximation is verified.The influences of mushy zone constant on the numerical simulation of the phase transition process is explored,and the value of the mushy zone constant suitable for this model is obtained.

关 键 词：焓-多孔介质模型 数值模拟 求解策略 相变材料 

分 类 号：TK121[动力工程及工程热物理—工程热物理]