A two-dimensional study on natural convection and heat transfer in the enclosure with heat transfer and radiation coupled in natural convection  

作　　者：ZHAN NaiYan1,2,YANG Mo1 & XU PeiWei2 1 College of Power Engineering,University of Shanghai for Science and Technology,Shanghiai 200093,China 2 Department of Environmental Engineering,Jilin Architectural and Civil Engineering Institute,Changchun 130021,China 

出　　处：《Science China(Technological Sciences)》2010年第4期991-999,共9页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No 50576057);the Shanghai Leading Academic Discipline Project (Grant No J50501)

摘　　要：Numerical investigation using SIMPLE algorithm with QUICK scheme for natural convection and heat transfer in the enclosure bounded by a solid wall and with heat transfer and radiation coupled in natural convection has been conducted.The various parameters are:Rayleigh number(from 103 to 105),dimensionless conductivity of bounding wall(from 0 to 100),dimensionless wall thickness(from 0 to 0.6) and radiation emissivity of all surfaces(from 0 to 1).The results suggest that flow and heat transfer are influenced by radiation.Radiation is a dominant action on flow and heat transfer.With increase of the thermal conductivity of wall,flow and heat transfer turn stronger.The temperature distribution changes obviously.When the thermal conductivity of wall is over a certain critical number,the increasing trend of flow and heat transfer may disappear.With increase of enclosure wall thickness,flow and heat transfer turn slighter.When the enclosure wall thickness is over a certain critical number,the flow and heat transfer will turn slow.Numerical investigation using SIMPLE algorithm with QUICK scheme for natural convection and heat transfer in the enclosure bounded by a solid wall and with heat transfer and radiation coupled in natural convection has been conducted.The various parameters are:Rayleigh number(from 103 to 105),dimensionless conductivity of bounding wall(from 0 to 100),dimensionless wall thickness(from 0 to 0.6) and radiation emissivity of all surfaces(from 0 to 1).The results suggest that flow and heat transfer are influenced by radiation.Radiation is a dominant action on flow and heat transfer.With increase of the thermal conductivity of wall,flow and heat transfer turn stronger.The temperature distribution changes obviously.When the thermal conductivity of wall is over a certain critical number,the increasing trend of flow and heat transfer may disappear.With increase of enclosure wall thickness,flow and heat transfer turn slighter.When the enclosure wall thickness is over a certain critical number,the flow and heat transfer will turn slow.

关 键 词：conduction NATURAL CONVECTION RADIATION COUPLE numerical simulation 

分 类 号：TK124[动力工程及工程热物理—工程热物理]