Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Journal of Enhanced Heat Transfer
IF: 0.562 5-Year IF: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Print: 1065-5131
ISSN Online: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2011003307
pages 503-511

NUMERICAL STUDY OF ENHANCED HEAT TRANSFER BY COUPLING NATURAL AND ELECTRO-CONVECTIONS IN A HORIZONTAL ENCLOSURE

R. Ghazi
School of Mechanical Engineering, Center of Excellence in Energy Conversion, Sharif University of Technology, Tehran, Iran
Mohammad S. Saidi
Center of Excellence in Energy Conversion, Sharif University of Technology, Tehran, Iran
Mohammad Hassan Saidi
Center of Excellence in Energy Conversion (CEEC), School of Mechanical Engineering, Sharif University of Technology, P.O. Box 11155-9567, Tehran, Iran

ABSTRACT

The heat transfer enhancement of natural convection using an electrohydrodynamic technique inside a horizontal enclosure heated from below is studied numerically. The interactions between the electric field, flow field, and temperature field are investigated by computational fluid dynamics methods. The flow and temperature fields are affected by voltage applied to the wire electrodes. For different voltages and numbers of electrodes, it is noticed that the Nusselt number increases in all cases and the best enhancement is obtained at lower Rayleigh numbers. It is also shown that increasing the number of electrodes does not always cause an increase in the heat transfer enhancement. Actually, when the number of electrodes is equal to the number of Bénard cells, the best heat transfer enhancement is obtained.


Articles with similar content:

THE ONSET OF MAGNETOELECTROCONVECTION IN A DIELECTRIC FLUID SATURATED POROUS MEDIUM
Special Topics & Reviews in Porous Media: An International Journal, Vol.9, 2018, issue 2
B. Rushi Kumar, P. A. Dinesh, B. V. Rangaraju, M. S. Gayathri
Heat Transfer Enhancement in a Differentially Heated Square Cavity in Presence of an Electric Field—A Finite Element Analysis
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 2
Asish Bandyopadhyay, Andrew Mintu Sarkar, Swarnendu Sen, Souvik Bhattacharya
Enhanced Heat Transfer in a Solar Air Heater with Double-Flow Configuration by Electrohydrodynamic Technique
Journal of Enhanced Heat Transfer, Vol.13, 2006, issue 1
Nat Kasayapanand, Nat Vorayos, Tanongkiat Kiatsiriroat
MODELLING ON THERMO-SOLUTAL CONVECTIVE FLOW DURING DIRECTIONAL SOLIDIFICATION OF A SEMICONDUCTOR
ICHMT DIGITAL LIBRARY ONLINE, Vol.13, 2008, issue
Farid Mechighel, Bernard Pateyron
Numerical Investigation of Hydro-Magnetic Flow of Air in a Lid Driven Cavity for an Optimum Magnetic Situation
International Journal of Fluid Mechanics Research, Vol.41, 2014, issue 5
Amir Javad Ahrar, Mohammad Hassan Djavareshkian