Numerical simulation and design optimization of an electrohydrodynamic pump for dielectric liquids |
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| Institution: | 1. Institut PPRIME, Département Fluide-Thermique-Combustion, Université de Poitiers, Boulevard Pierre et Marie Curie, BP 30179, 86962 Futuroscope-Chasseneuil, France;2. Departamento de Electrónica y Electromagnetismo, Universidad de Sevilla, Facultad de Física, Avenida Reina Mercedes s/n, 41012 Sevilla, Spain;3. Departamento de Física Aplicada III, Universidad de Sevilla, ESI, Camino de los Descubrimientos s/n, 41092 Sevilla, Spain;1. School of Mechanical Engineering, University of Leeds, UK;2. Department of Mechanical Engineering, University of Anbar, Iraq;3. Research Institutes of Sweden, Swedish Institute of Computer Science North, Lulea, Sweden;1. Mechanical Engineering Department, University of Balamand, Al-Kurah, Lebanon;2. EHD Team, Pprime Institute, CNRS, University of Poitiers, ISAE-ENSMA, Poitiers, France;3. Department of Applied Physics III, University of Seville, Seville, Spain;1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. GeoRessources Laboratory, Université de Lorraine (ENSG), CNRS, CREGU, F-54501 Vandoeuvre-les-Nancy, France |
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| Abstract: | With an ever increasing demand for more effective heat sinks, liquid based electronic cooling has become a new prospect in the field. The present study introduces an electrohydrodynamic (EHD) pump with a simple design for dielectric liquids which have potential applications for electronic cooling. The pump consists of an eccentrically sandwiched wire electrode placed at the horizontal centerline between two parallel flat-plate electrodes. The EHD flow of dielectric liquid induced by the space charge generated due to the Onsager effect was obtained by the numerical solution of the Poisson–Nernst–Planck equations for ion transport and the Navier–Stokes equations for fluid flow. Good agreement obtained in the comparison of the numerical and the experimental results of velocity for the centrally sandwiched wire electrode case confirmed the validity of the numerical results. For a fixed voltage, the pump flow rate depends on the eccentricity of the wire electrode with respect to the plate electrodes and also with the electrode dimensions. By using the Taguchi method an optimum design for the EHD pump is obtained considering the wire electrode diameter, the flat plate electrode length and the eccentricity (the horizontal distance between the centers of wire and flat-plate electrodes) as the design parameters for fixed channel dimensions. |
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