Mixed convection of a heated rotating cylinder in a square enclosure
Mixed convection of a heated rotating cylinder in a square enclosure
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DOI：
10.1016/j.ijheatmasstransfer.2013.12.081
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发表时间：
2014-05-01
影响因子：
5.2
通讯作者：
Lin, Chao-An
中科院分区：
文献类型：
--
作者：
Liao, Chuan-Chieh;Lin, Chao-An
采用浸入边界法对含静止和旋转圆柱的区域内的自然对流和混合对流进行了数值研究。该方法首先通过同心圆柱与方形腔之间的环形区域内自然对流所诱导的流动进行了验证。进一步研究了含主动旋转圆柱的方形腔在不同转速下的稳态混合对流。研究中所考察的参数包括瑞利数、普朗特数以及内圆柱与外腔之间的纵横比。得到了系统在10⁴ - 10⁶范围内不同瑞利数（Ra）下的传热量。还研究了在0.07 - 7.0范围内不同普朗特数下旋转对流动不稳定性的影响。对内圆柱和外腔表面周围的局部和平均传热特性进行了充分研究。（c）2014爱思唯尔有限公司。保留所有权利。
Numerical investigations were carried out for natural and mixed convection within domains with stationary and rotating cylinder by using an immersed-boundary method. The method was first validated with flows induced by natural convection in the annulus between concentric circular cylinder and square enclosure. Steady mixed convection in a square enclosure with an active rotating cylinder was further investigated for different rotating speeds. The parameters investigated in the study included Rayleigh number, Prandtl number and the aspect ratio between inner cylinder and outer enclosure. The heat transfer quantities of the system were obtained for different Rayleigh numbers (Ra) within the range of 10(4)-10(6). The influence of rotation on the instability of the flow at different Prandtl numbers within the range of 0.07-7.0 was also investigated. Local and average heat transfer characteristics were fully studied around the surfaces of both inner cylinder and outer enclosure. (c) 2014 Elsevier Ltd. All rights reserved.