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首页> 外文期刊>Journal of Heat Transfer >Combined Dielectrophoretic and Electrohydrodynamic Conduction Pumping for Enhancement of Liquid Film Flow Boiling
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Combined Dielectrophoretic and Electrohydrodynamic Conduction Pumping for Enhancement of Liquid Film Flow Boiling

机译：介电泳和电流体动力传导联合泵浦增强液膜流沸腾

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摘要

This paper extends previous liquid film flow boiling studies by including the effect of an additional electrohydrodynamic (EHD) force, namely, the dielectrophoretic (DEP) force. Rather than using only EHD conduction pumping of the liquid film to electro-wet the heater surface, a localized nonuniform electric field above the heater surface is established to generate a DEP force for improved vapor bubble extraction during the nucleate boiling regime. The effects of liquid film height and applied potential are studied as a function of heater superheat and heat flux. A brief analytical study is also used to estimate the expected DEP force magnitude to explain the results. All of the above studies are also used to quantify the enhancement in heat transfer that can be achieved when heat transport systems are driven or augmented by these two EHD mechanisms. The results show remarkable enhancement of up to 1217% in boiling heat transfer coefficient at a given superheat when both mechanisms are used simultaneously. The experimental data are important for applications in thermal management in terrestrial and space conditions.
机译：本文通过包括附加的电流体动力学（EHD）力，即介电电泳（DEP）力的影响，扩展了以前的液膜流动沸腾研究。不仅使用液膜的EHD传导泵将加热器表面电润湿，还建立了加热器表面上方的局部非均匀电场，以产生DEP力，以在成核沸腾过程中改善蒸汽气泡的提取。研究了液膜高度和施加电势对加热器过热和热通量的影响。简短的分析研究还用于估计预期的DEP力大小，以解释结果。所有上述研究还用于量化传热系统的增强，当通过这两种EHD机制驱动或增强传热系统时，可以实现这些功能。结果表明，当同时使用两种机理时，在给定的过热下，沸腾传热系数最高可提高1217％。实验数据对于地面和太空条件下的热管理应用非常重要。

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  • 来源
    《Journal of Heat Transfer》 |2017年第6期|061502.1-061502.9|共9页
  • 作者

    Viral K. Patel; Jamal Seyed-Yagoobi;

  • 作者单位

    Multi Scale Heat Transfer Laboratory, Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609;

    Multi Scale Heat Transfer Laboratory, Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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