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Asian Journal of Scientific Research
Year: 2008  |  Volume: 1  |  Issue: 6  |  Page No.: 562 - 578

Heat Transfer Enhancement in the Presence of an Electric Field at Low and Intermediate Reynolds Numbers

E. Esmaeilzadeh, A. Alamgholilou, H. Mirzaie and M. Ashna    

Abstract: The aim of this study is an application of the EHD actuator on local heat transfer enhancement by using wire-plate electrodes in laminar and turbulent duct flow. In this study, the effects of an electric field and temperature field on the fluid flow as an active method of enhancement is numerically investigated. The hydrodynamics and heat transfer behaviors of laminar and turbulent duct flow with specific boundary conditions in the presence of an EHD actuator was taken into consideration. The partial difference equations of flow field and electric field namely continuity, momentum and energy equations for fluid flow and electric current and Poisson’s equations for electric field was numerically solved with finite volume method. At first, the electric equations were solved and then the results were imported to the fluid field for improvement of the body forces. The obtained results show for the flows with Re≤1000 with single wire-plate electrode is suitable for local enhancement. By adding the number of wires to three, it is possible to use this method for turbulent flow up to Re = 2000.

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