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Journal of Enhanced Heat Transfer
Facteur d'impact: 0.562 Facteur d'impact sur 5 ans: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Imprimer: 1065-5131
ISSN En ligne: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v1.i1.100
pages 115-126

Simulation of Electrohydrodynamic Enhancement of Laminar Flow Heat Transfer

George S. Dulikravich
Department of Mechanical and Materials Engineering, MAIDROC Laboratory Florida International University, 10555 West Flagler St., EC 3462, Miami, Florida 33174, USA
Vineet Ahuja
Department of Aerospace Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA 16802
Seungsoo Lee
Research Scientist, Agency for Defense Development, Taejon, Korea

RÉSUMÉ

A mathematical model for laminar steady flow of an incompressible, viscous, neutrally-charged carrier fluid mixed with a fluid having electrically charged particles is presented. Thermally induced buoyancy was incorporated via an extended Boussinesq approximation allowing for temperature-dependent density, viscosity, heat conductivity and heat capacity while including Joule heating and electroconvective motions due to Lorentz forces. Induced magnetic fields and viscous dissipation in energy conservation equation have been neglected. Viscosity was modeled as a function of local electrical charge concentration thus simulating particle chaining phenomena in electrorheological fluids. Numerical results clearly demonstrate the influence that an applied electrostatic field and the consequent electric charge gradients can have on the flow pattern, temperature field and surface convective heat fluxes.


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