A spherical dielectric droplet translating steadily in another dielectric liquid with a uniform electric field imposed in the translational direction of the droplet is studied theoretically. With the small Reynolds number and large Peclet number assumptions, analytic solutions are obtained for the stream function with a term involving the interfacial temperature distribution which is then computed numerically. The results indicate that the interfacial temperature distribution is indeed nonuniform and the thermocapillarity might exist thereby. The induced thermocapillary flows in the droplet are usually of multiple cells with which the heat transfer rate may increases or decreases depending on whether the original flow is enhanced or suppressed. For the example calculated in the present study, the heat transfer rate is decreased by the thermocapillary effect.
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Transient Thermocapillary Flows Induced by a Droplet Translating in an Electric Field
Chun-Liang Lai,
Chun-Liang Lai
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 106, R.O.C
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Wen-Lang Tang
Wen-Lang Tang
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 106, R.O.C
Search for other works by this author on:
Chun-Liang Lai
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 106, R.O.C
Wen-Lang Tang
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 106, R.O.C
J. Heat Transfer. Aug 1998, 120(3): 752-757 (6 pages)
Published Online: August 1, 1998
Article history
Received:
October 10, 1997
Revised:
March 16, 1998
Online:
December 5, 2007
Citation
Lai, C., and Tang, W. (August 1, 1998). "Transient Thermocapillary Flows Induced by a Droplet Translating in an Electric Field." ASME. J. Heat Transfer. August 1998; 120(3): 752–757. https://doi.org/10.1115/1.2824345
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