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Deformation of bulk dielectric fluids under corona-initiated charge injection

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Abstract

Electrohydrodynamic (EHD) flow induced in dielectric fluids by charge injection is capable of producing convective instabilities accompanied by surface deformation of fluids. This work presents the results of experimental observations of the EHD flow induced in bulk dielectric liquid layers using corona discharge. A method for deformation analysis of surface liquid is presented and used to characterize the convective instabilities and bulk deformations formed within the fluid. The governing liquid properties for the deformations are discussed, indicating the vital role of surface tension and viscosity. Critical voltages at which rapid transformation of the liquid’s deformation occurs are identified and discussed. Consideration is also given to the potential application of the EHD flow as an air-wave-type EHD pump, including analyses of pumping performance and its governing parameters. The liquid layer thickness is shown to be a dominant parameter in the efficacy of such proposed pump designs.

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Author notes

  1. Marwan H. Mohamed and Mohcen Shahbaznezhad have contributed equally to this work.

Authors and Affiliations

  1. Department of Mechanical, Industrial, and Manufacturing Engineering, The University of Toledo, Toledo, OH, 43606, USA

    Marwan H. Mohamed, Amir Dehghanghadikolaei, Md. Ashraful Haque & Hossein Sojoudi

  2. Department of Electrical Engineering and Computer Science, The University of Toledo, Toledo, OH, 43606, USA

    Mohcen Shahbaznezhad

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  1. Marwan H. Mohamed
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  2. Mohcen Shahbaznezhad
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  3. Amir Dehghanghadikolaei
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Correspondence to Hossein Sojoudi.

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Mohamed, M.H., Shahbaznezhad, M., Dehghanghadikolaei, A. et al. Deformation of bulk dielectric fluids under corona-initiated charge injection. Exp Fluids 61, 116 (2020). https://doi.org/10.1007/s00348-020-02951-5

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  • DOI: https://doi.org/10.1007/s00348-020-02951-5

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