Comparison on Electrode and Ground Arrangements Effect on Heat Transfer under Electric Force in a Channel and a Cavity Flow

Authors: Suwimon Saneewong Na Ayuttaya, Chainarong Chaktranond, Phadungsak Rattanadecho

Abstract:

This study numerically investigates the effects of Electrohydrodynamic on flow patterns and heat transfer enhancement within a cavity which is on the lower wall of channel. In this simulation, effects of using ground wire and ground plate on the flow patterns are compared. Moreover, the positions of electrode wire respecting with ground are tested in the range of angles θ = 0 - 180^o. High electrical voltage exposes to air is 20 kV. Bulk mean velocity and temperature of inlet air are controlled at 0.1 m/s and 60 ^OC, respectively. The result shows when electric field is applied, swirling flow is appeared in the channel. In addition, swirling flow patterns in the main flow of using ground plate are widely spreader than that of using ground wire. Moreover, direction of swirling flow also affects the flow pattern and heat transfer in a cavity. These cause the using ground wire to give the maximum temperature and heat transfer higher than using ground plate. Furthermore, when the angle is at θ = 60^o, high shear flow effect is obtained. This results show high strength of swirling flow and effective heat transfer enhancement.

Keywords: Swirling Flow, Heat Transfer, Electrohydrodynamic, Numerical Analysis.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1337291

References:

[1] H. M. Deylami, N. Amanifred, F. Dolati, R. Kouhikamali, and K. Mostajiri, "Numerical investigation of using various electrode arrangements for amplifying the EHD enhanced heat transfer in a smooth channel,” J.Electrostatics, vol. 71, pp. 656-665, March 2013.
[2] S. Saneewong Na Ayuttaya, C. Chaktranond, P. Rattanadecho, and T. Kreewatcharin, "Effect of Ground Arrangements on Swirling Flow in a Channel Subjected to Electrohydrodynamic Effects,” ASME J. Fluids Eng, vol. 134, pp. 051211-1-051211-10, March 2012.
[3] J. Seyed-Yagoobi, and J.E. Bryan, "Enhancement of Heat Transfer and Mass Transport in Single-Phase and Two-Phase Flows with Electrodynamics,” Adv. In Heat Transfer, vol. 33, pp. 95-186, April 1999.
[4] S.D. Oh, and H.Y. Kwak, "Electrohydrodynamic (EHD) Enhancement of Boiling Heat Transfer of R113+WT4% Ethanol,” J. Mech. Sci. and Tech, vol. 20, pp. 681-691, March 2006.
[5] D.B. Go, R.A. Maturana, T.S. Fisher, and S.V. Garimella, "Enhancement of external forced convection by ionic wind,” Int.J.Heat and Mass Transfer, vol. 51, pp. 6047-6053, July 2008.
[6] M. Huang, and F.C. Lai, "Numerical study of EHD-enhanced water evaporation,” J.Electrostatics, vol. 68, pp. 364-370, August 2010.
[7] L. Zhao, and K. Adamiak, "Numerical Simulation of the Electrohydrodynamic Flow in a Single Wire-Plate Electrostatic Precipitator,” IEEE Trans. Ind. Appl, vol. 44(3), pp. 683-691, May/June 2008.
[8] M. R. Ramachandran, and F. C. Lai, "Effects of Porosity on the EHD-Enhanced Drying,” Drying Technol, vol. 28, pp. 1477-1483, November 2010.
[9] C. Chaktranond and P. Ratanadecho, "Analysis of heat and mass transfer enhancement in porous material subjected to electric fields (effects of particle sizes and layered arrangement),” Exp. Therm. Fluid Sci, vol. 34, pp. 1049-1056, February 2010.
[10] S. Saneewong Na Ayuttaya, C. Chaktranond, and P. Rattanadecho, "Numerical Analysis of Influence of Electrode Position on Fluid Flow in 2-D Rectangular Duct Flow,” J. Mech. Sci. and Tech, vol. 207(7), pp. 1957-1962, March 2013.
[11] J. G. David, "Introduction to Electrohydrodynamics,” in Plastics, 3rd ed. New Jersey: Prentice Hall International, 1999, pp.123-125.