Natural convection of water near its density maximum in cavity with complex geometry structure

doi:10.3969/j.issn.0438-1157.2014.z1.011

CIESC Journal ›› 2014, Vol. 65 ›› Issue (S1): 66-72.DOI: 10.3969/j.issn.0438-1157.2014.z1.011

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Natural convection of water near its density maximum in cavity with complex geometry structure

HU Yupeng¹, MO Dongming^1,2, LI Yourong¹

1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China;
2. Department of Mechanical Engineering, Chongqing Industry Polytechnic College, Chongqing 401120, China

Received:2014-01-20 Revised:2014-01-30 Online:2014-05-30 Published:2014-05-30
Supported by:
supported by the National Natural Science Foundation of China (50976129).

复杂几何结构腔体内冷水自然对流传热数值模拟

胡宇鹏¹, 莫东鸣^1,2, 李友荣¹

1. 重庆大学动力工程学院低品位能源利用技术及系统教育部重点实验室, 重庆 400044;
2. 重庆工业职业技术学院机械工程学院, 重庆 401120

通讯作者: 李友荣
基金资助:
国家自然科学基金项目（50976129）。

Abstract

Abstract: A series of numerical simulations on natural convection of water near its density maximum in a cavity with complex geometry structure was performed using finite volume method. The flow and thermal fields and the variation law of local and average Nusselt on the wall with the Rayleigh number at different density inversion parameters were obtained. The results show that the effect of density inversion parameter on the flow structure and heat transfer characteristic is significant. The flow intensity becomes weak with the increase of the aspect ratio. Under the same conditions, the flow, thermal fields and heat transfer rates vary in degree with the geometry structure of the out wall changes.

Key words: natural convection, density maximum, heat transfer, geometry structure, numerical simulation

摘要： 利用有限容积法对复杂几何结构异形腔体内具有密度极值的冷水自然对流传热进行了一系列数值模拟，获得了多种异形腔体内不同密度倒置参数和Rayleigh数下的流场和温度场、壁面局部和平均Nusselt数等的变化规律。结果表明：密度倒置参数对流场结构、壁面局部Nusselt数分布和平均Nusselt数影响较大；径深比较小时，流动较强，随着径深比的增大，流动减弱；相同条件下，改变外壁面几何结构，封闭腔体内温度场、流场及壁面传热特性都有不同程度的变化。

关键词: 自然对流, 密度极值, 传热, 几何结构, 数值模拟

CLC Number:

TK124

HU Yupeng, MO Dongming, LI Yourong. Natural convection of water near its density maximum in cavity with complex geometry structure[J]. CIESC Journal, 2014, 65(S1): 66-72.

胡宇鹏, 莫东鸣, 李友荣. 复杂几何结构腔体内冷水自然对流传热数值模拟[J]. 化工学报, 2014, 65(S1): 66-72.

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Natural convection of water near its density maximum in cavity with complex geometry structure

复杂几何结构腔体内冷水自然对流传热数值模拟

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