Numerical Study of EHD-Enhanced Forced Convection Using Two-Way Coupling
Numerical Study of EHD-Enhanced Forced Convection Using Two-Way Coupling
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DOI：
10.1115/1.1578505
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发表时间：
2001-11
期刊：
影响因子：
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通讯作者：
M. Huang;F. Lai
中科院分区：
文献类型：
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作者：
M. Huang;F. Lai
本文对水平通道内电场强化对流换热进行了数值模拟。电场是通过用高压直流电对位于通道中心的线电极充电而产生的。本研究的主要目的是验证在这类问题的数值研究中常用的假设，该假设假设电场可以改变流场，但反之亦然（即，所谓的单向耦合）。为此，数值解已经获得了一个广泛的范围内的管理参数（Vo = 10，12.5，15和17.5千伏以及ui = 0.0759至1.2144米/秒）使用单向和双向耦合。使用双向耦合的方法，可能修改的电场的主流，这是以前被忽略的，占。使用这两种方法得到的结果，在流量，温度和电场以及传热增强方面，进行了彻底的检查。此外，它们对流动稳定性的影响进行了研究。最后，对单向耦合的有效性进行了总结。
In this paper, numerical results are presented for heat transfer enhancement using electric field in forced convection in a horizontal channel. The electric field is generated by charging a wire electrode located at the center of the channel with direct current at a high voltage. The main objective of the present study is to verify the assumption that is commonly used in the numerical study of this kind of problems, which assumes the electric field can modify the flow field but not vice versa (i.e., the so-called one-way coupling). To this end, numerical solutions have been obtained for a wide range of governing parameters (Vo = 10, 12.5, 15 and 17.5 kV as well as ui = 0.0759 to 1.2144 m/s) using both one-way and two-way couplings. Using the two-way coupling approach, the possible modification of the electric field by the primary flow, which was previously neglected, is accounted for. The results obtained using these two approaches, in terms of the flow, temperature, and electric fields as well as the heat transfer enhancement, are thoroughly examined. In addition, their influence over the flow stability is investigated. Finally, the conclusion about the validity of the one-way coupling is reached at the end of the study.