封闭方腔自然对流传热的场协同分析  

Field Synergy Analysis on the Natural Convection Heat Transfer in Closed Square Cavity

作　　者：云和明[1] 张华伟[2] 邱卫国[1] 

机构地区：[1]山东建筑大学热能工程学院,山东济南250101 [2]山东艺术学院后勤管理处,山东济南250014

出　　处：《齐鲁师范学院学报》2014年第4期106-112,共7页Journal of Qilu Normal University

基　　金：山东省自然基金(ZR2010EM06);山东建筑大学博士基金(No.824008)

摘　　要：文章采用有限元方法数值研究了封闭方腔自然对流传热问题,并基于场协同理论分析了速度场与温度梯度场的协同关系,进一步深层次分析了协同角场同速度场、温度场、温度梯度场之间的协同关系,展示了不同瑞利数下方腔自然对流速度场和温度梯度的协同效果,着重探讨了各物理场对封闭方腔协同角的影响规律,同时表明以协同角为评价指标,可有助于改善局部的传热效果,从而深层次理解强化自然对流传热的机理,为实际工程的传热强化提供了理论依据。The natural convection heat transfer has been studied numerically by using finite element method. Field synergy theory has been used to analyze the synergy between the velocity field and the temperature gradient field. The synergy between the synergy angle and velocity field, temperature field, temperature gradient field has been discussed deeply, which shows the synergistic effect of velocity field and temperature field in closed square cavity with different Rayleigh numbers. The influence mechanism on synergy angle caused by various physical field has been focused to discuss. At the same time synergy angle can be used as evaluation index of heat transfer enhancement, which can help to improve the local heat transfer effect and understand the mechanism of heat transfer enhancement of natural convection.

关 键 词：自然对流 场协同 温度梯度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]