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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 68, 2015 - Issue 5
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Original Articles

A Finite-Volume Method for Electro-Thermoconvective Phenomena in a Plane Layer of Dielectric Liquid

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Pages 471-500 | Received 08 Aug 2014, Accepted 07 Nov 2014, Published online: 23 Apr 2015
 

Abstract

This article presents a numerical algorithm for electro-thermoconvective phenomena in a dielectric liquid confined between two parallel plates. The liquid is under the simultaneous actions of a direct current electric field and a thermal gradient. Free charge carriers are considered to be introduced by unipolar injection. The fully coupled equations including a reduced set of Maxwell's equations, the Navier–Stokes equations, and the energy equation, together with the equations of state, are solved with a finite-volume method. A total variation-diminishing scheme is especially used to solve the convection-dominated charge density equation. The method is validated with four test cases that possess some analytical solutions. As an application example, we evaluate the heat transfer enhancement resulting from injection-induced electroconvection in a bounded cavity filled with silicone oil.

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