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Numerical simulation of electrohydrodynamically enhanced natural convection heat transfer of dielectric liquid in a horizontal annulus

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2 Author(s)
Chang, Jen‐Shih ; Dept. of Eng. Phys., McMaster Univ., Hamilton, Ont., Canada ; Tran, F.B.P.

The electrohydrodynamically enhanced natural convection of dielectric liquids in a horizontally cylindrical annulus was numerically investigated under DC and pulsed applied electric field conditions over the range of Rayleigh number from 104 to 2×104 , the Prandtl number from 5 to 7, and the electric Rayleigh number from 0 to 2×103 for the inner-to-outer radius ratio of 2. Simulation results show that the applied, radial, DC electric field always enhances the heat transfer by natural convection process. The velocity and heat transfer enhancement are from a factor of 2 to 20 and from 10% to 30%, respectively, for EI varying from 5×102 to 2×103

Published in:

Conduction and Breakdown in Dielectric Liquids, 1990. ICDL 1990. Conference Record., 10th International Conference on

Date of Conference:

10-14 Sep 1990