CAJ | 학술논문

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。
문장채용유한원방법수치연구료봉폐방강자연대류전열문제，병기우장협동이론분석료속도장여온도제도장적협동관계，진일보심층차분석료협동각장동속도장、온도장、온도제도장지간적협동관계，전시료불동서리수하방강자연대류속도장화온도제도적협동효과，착중탐토료각물리장대봉폐방강협동각적영향규률，동시표명이협동각위평개지표，가유조우개선국부적전열효과，종이심층차리해강화자연대류전열적궤리，위실제공정적전열강화제공료이론의거。
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.