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Effects of an Inhomogenous Electric Field on an Evaporating Thin Film in a Microchannel

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Abstract

In this paper, heat transfer enhancement in an evaporating thin film along the wall of a microchannel under an imposed inhomogenous electrostatic field is analyzed. The mathematical model, based on the augmented Young–Laplace equation with the inhomogenous electrostatic field taken into consideration, is developed. The 2D inhomogenous electric field with the curved liquid–vapor interface is solved by the lattice Boltzmann method. Numerical solutions for the thin film characteristics are obtained for both constant wall temperature and uniform wall heat flux boundary conditions. The numerical results show that the liquid film becomes thinner and the heat transfer coefficient increases under an imposed electric field. Both of octane and water are chosen as the working mediums, and similar result about the enhancement of heat transfer on evaporating thin film by imposing electric field is obtained. It is found that applying an electric field on the evaporating thin film can enhance evaporative heat transfer in a microchannel.

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Acknowledgements

The authors would like to thank Dr. Zhuoyao He, Dr. Kunxu Zhu and Dr. Qiang Lin for many helpful discussions.

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Authors and Affiliations

  1. Wuhan Second Ship Design and Research Institute, Wuhan, 430064, Hubei, China

    Xiuliang Liu, Chen Hu, Huafeng Li, Fei Yu & Xiaming Kong

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  1. Xiuliang Liu
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  2. Chen Hu
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  3. Huafeng Li
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  4. Fei Yu
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  5. Xiaming Kong
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Correspondence to Xiuliang Liu.

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Liu, X., Hu, C., Li, H. et al. Effects of an Inhomogenous Electric Field on an Evaporating Thin Film in a Microchannel. Int J Thermophys 39, 43 (2018). https://doi.org/10.1007/s10765-018-2363-6

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  • DOI: https://doi.org/10.1007/s10765-018-2363-6

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