Numerical Investigation of Electrohydrodynamics: Enhanced Heat Transfer in a Solid Sample

Authors: Suwimon Saneewong Na Ayuttaya

Abstract:

This paper presents a numerical investigation of electrically driven flow for enhancing convective heat transfer in a channel flow. This study focuses on the electrode arrangements, number of electrode and electrical voltage on Electrohydrodynamics (EHD) and effect of airflow driven on solid sample surface. The inlet airflow and inlet temperature are 0.35 m/s and 60 ^oC, respectively. High electrical voltage is tested in the range of 0-30 kV and number of electrode is tested in the range of 1-5. The numerical results show that electric field intensity is depended on electrical voltage and number of electrode. Increasing number of electrodes is increased shear flow, so swirling flow is increased. The swirling flows from aligned and staggered arrangements are affecting within the solid sample. When electrical voltage is increased, temperature distribution and convective heat transfer on the solid sample are significantly increased due to the electric force much stronger.

Keywords: Electrohydrodynamics, swirling flow, convective heat transfer, solid sample.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1126599

References:

[1] G. S. Dulikravich, V. Ahuja and S. Lee, “Modeling of dielectric fluid solidification with charged particles in electric fields and reduced gravity,” Numerical Heat Transfer, Part A., vol. 25, pp. 357-373, 1994.
[2] A. Yabe, Y. Mori and K. Hijikata, “Active heat transfer enhancement by utilizing electric fields,” Annual Reviews of Heat Transfer., vol.7, pp. 193-244, 1996.
[3] N. G. Green, A. Ramos, A. Gonzalez, A. Castellanos and H. Morgan, “Electric field induced fluid flow on microelectrodes: the effect of illumination,” Journal of Physics D: Applied Physics., vol. 33(2), pp. 13-17, 1999.
[4] W. D. Ristenpart, I. A. Aksay and D. A. Saville, “Assembly of colloidal aggregates by electrohydrodynamic flow: kinetic experiments and scaling analysis,” Physical Review., vol. 69, pp. 021405-1-021405-8, 2004.
[5] N. Takeuchi, K. Yasuoka and S. Ishii, “Inducing mechanism of electrohydrodynamic flow by surface barrier Discharge,” IEEE Transactions on Plasma Science, vol. 35(6), pp. 1704-1709, 2007.
[6] G. Tomar, D. Gerlach, G. Biswas, N. Alleborn, A. Sharma, F. Durst, S. W. J. Welch and A. Delgado, “Two-phase electrohydrodynamic simulation using a volume-of-fluid approach,” Journal of Computational Physics, vol. 227, pp. 1267-1285, 2007.
[7] S. Saneewong Na Ayuttaya, C. Chaktranond and P. Rattanadecho, “Numerical analysis of influence of electrode position on fluid flow in a 2-D rectangular duct flow,” Journal of Mechanical Science and Technology, vol. 27(7), 1957-1962, 2013.
[8] D. B. Go, A. Maturana, T. S. Fisher and S. V. Garimella, “Enhancement of external forced convection by ionic wind,” Internal Journal of Heat and Mass Transfer, vol. 51, pp. 6047-6053, 2008.
[9] C. Chaktranond and P. Ratanadecho, “Analysis of heat and mass transfer enhancement in porous subjected to electric fields (effects of particle sizes and layered arrangement),” Experimental Thermal and Fluid Science, vol. 34, pp. 1049-1056, 2010.
[10] N. Sharma, G. Diaz and E. Leal-Quirós, “Electrolyte film evaporation under the effect of externally applied electric field,” International Journal of Thermal Sciences, vol. 68, pp. 119-126, 2013.
[11] L. D. Landau and E. M. Lifshitz, “Electrohydrodynamics of Continuous Media,” Pergamon, New York, 1963.
[12] M. N. Ramesh, “Effect of cooking and drying on the thermal conductivity of rice,” International Journal of Food Properties, vol. 3(1), pp. 77-92, 2000.