Effect of longitudinal electrode arrangement on EHD-induced heat transfer enhancement in a rectangular channel
Effect of longitudinal electrode arrangement on EHD-induced heat transfer enhancement in a rectangular channel
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纵向电极布置对矩形通道内 EHD 诱导强化传热的影响
DOI：
10.1016/j.ijheatmasstransfer.2015.10.043
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发表时间：
2016-02
影响因子：
5.2
通讯作者：
Xiao-Dong Wang
中科院分区：
文献类型：
--
作者：
Ming Peng;Tian-Hu Wang;Xiao-Dong Wang
本研究以电流体动力学强化矩形通道内之热传。数值模拟研究了单电极纵向位置、多电极纵向排列以及最佳纵向排列时电极数量对电极性能的影响。用平均换热系数与无EHD时的平均换热系数之比n来评价EHD强化换热的程度。结果表明，电极越靠近入口，n越大。研究还发现，在确定最佳纵向电极布置时，入口关闭位置要求和大电极间隙要求之间存在竞争。在此基础上，提出了给定电极数的最优纵向电极排列的设计准则。结果还表明，当电极数超过一定值（本文中为7）时，最优电极排列下的n达到一个平台;进一步增加电极数只会增加功耗，而对强化传热没有贡献. that.as这里所示的结果是有限的几何形状和本研究中使用的参数范围。
In this study, heat transfer enhancement in a rectangular channel by electrohydrodynamics (EHD) is investigated. The numerical simulation deals with the effects of longitudinal position for single electrode, longitudinal arrangement for multiple electrodes, and electrode number with optimal longitudinal arrangement. A factor n defined as the ratio of average heat transfer coefficient with EHD to that without EHD is used to evaluate the level of EHD-induced heat transfer augmentation. The results show that the closer for the electrode to the inlet, the larger the n is. It is also found that there is a competition between the inlet-closed position requirement and large electrode gap requirement to determine the optimal longitudinal electrode arrangement. Based on this result, the design criterion for the optimal longitudinal electrode arrangement with given electrode number is proposed and justified. The results also show that.as the electrode number exceeds a certain value (7 in the present paper), the n with the optimal electrode arrangement reaches a plateau; further increasing the electrode number only increases the power consumption but has no contribution to the heat transfer enhancement. The results indicated here are limited to the geometry and the parameter range used in the present study.
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DOI：
10.1016/j.ijheatmasstransfer.2013.04.010
发表时间：
2013-09
影响因子：
5.2
作者：
S. I. N. Ayuttaya;Chainarong Chaktranond;P. Rattanadecho
通讯作者：
S. I. N. Ayuttaya;Chainarong Chaktranond;P. Rattanadecho
影响因子：
8.7
作者：
N. Kasayapanand;T. Kiatsiriroat
通讯作者：
N. Kasayapanand;T. Kiatsiriroat
影响因子：
1.8
作者：
N. Kasayapanand
通讯作者：
N. Kasayapanand
影响因子：
4.4
作者：
A. Mazumder;F. Lai
通讯作者：
A. Mazumder;F. Lai
DOI：
10.1115/1.1578505
发表时间：
2001-11
期刊：
Heat Transfer: Volume 5 — Computational, Aerospace and Environmental Heat Transfer
影响因子：
--
作者：
M. Huang;F. Lai
通讯作者：
M. Huang;F. Lai