Mechanism and control of convective heat transfer——Coordination of velocity and heat flow fields  

作　　者：QUO ZengyuanDepartment of Engineering Mechanics, Tsinghua University, Beijing 100084, China 

出　　处：《Chinese Science Bulletin》2001年第7期596-599,共4页

基　　金：the State Basic Research Program of China (Grant No. G20000263).

摘　　要：A second look has been given at the mechanism of convective heat transfer based on the analogy between convection and conduction with heat sources. The strength of convective heat transfer depends not only on the fluid velocity and fluid properties, but also on the coordination of fluid velocity and heat flow fields. Hence, based on the included angle of velocity and temperature gradient vectors, the presence of fluid motion may enhance or reduce heat transfer. With this concept, the known heat transfer phenomena may be understood in a deeper way. More important is that some novel approaches of heat transfer control can be developed.A second look has been given at the mechanism of convective heat transfer based on the analogy between convection and conduction with heat sources. The strength of convective heat transfer depends not only on the fluid velocity and fluid properties, but also on the coordination of fluid velocity and heat flow fields. Hence, based on the included angle of velocity and temperature gradient vectors, the presence of fluid motion may enhance or reduce heat transfer. With this concept, the known heat transfer phenomena may be understood in a deeper way. More important is that some novel approaches of heat transfer control can be developed.

关 键 词：CONVECTIVE HEAT TRANSFER COORDINATION HEAT TRANSFER enhancement. 

分 类 号：TK124[动力工程及工程热物理—工程热物理]