Least dissipation principle of heat transport potential capacity and its application in heat conduction optimization  

作　　者：GUOZengyuan CHENGXinguang 等 

机构地区：[1]DepartmentofEngineeringMechanics,KeyLabofEnhancedHeatTransferandEnergyConservationofEducationMinistry,TsinghuaUniveristy,Beijing100084,China [2]DepartmentofEngineeringMechanics,KeyLabofEnhancedHeatTransf

出　　处：《Chinese Science Bulletin》2003年第4期406-410,共5页

摘　　要：In the viewpoint of heat transfer, heat transport potential capacity and its dissipation are defined based on the essence of heat transport phenomenon. Respectively, their physical meanings are the overall heat transfer capa-bility and the dissipation rate of the heat transfer capacity. Then the least dissipation principle of heat transport poten-tial capacity is presented to enhance the heat conduction efficiency in the heat conduction optimization. The principle is, for a conduction process with the constant integral of the thermal conductivity over the region, the optimal distribu-tion of thermal conductivity, which corresponds to the high-est heat conduction efficiency, is characterized by the least dissipation of heat transport potential capacity. Finally the principle is applied to some cases in heat conduction optimi-zation.In the viewpoint of heat transfer, heat transport potential capacity and its dissipation are defined based on the essence of heat transport phenomenon. Respectively, their physical meanings are the overall heat transfer capa-bility and the dissipation rate of the heat transfer capacity. Then the least dissipation principle of heat transport poten-tial capacity is presented to enhance the heat conduction efficiency in the heat conduction optimization. The principle is, for a conduction process with the constant integral of the thermal conductivity over the region, the optimal distribu-tion of thermal conductivity, which corresponds to the high-est heat conduction efficiency, is characterized by the least dissipation of heat transport potential capacity. Finally the principle is applied to some cases in heat conduction optimi-zation.

关 键 词：传热 导热 最小损耗原则 非平衡态 焓 优化 

分 类 号：TK12[动力工程及工程热物理—工程热物理]