Numerical Investigation of the Electric Field Effects on the Flow and Forced Convection Heat Transfer over a Backward-acing Step

Authors

1 Mech. Eng., University of Guilan, Rasht, Iran

2 Dep. Mech. Eng., University of Guilan, Rasht, Iran

3 Faculty of Technology and Engineering, East of Guilan, University of Guilan, Rudsar, Iran

Abstract

In this paper, the flow and temperature fields affected by electric field applied to the fine wire are numerically investigated for the incompressible, turbulent, and steady flow over a backward-facing step. The numerical modeling is based for solving electric, flow, and energy equations with the finite volume approach. The computed results are firstly compared with the experimental data in case of flat plate and the results agree very well. Then, the effect of different parameters such as the applied voltage, Reynolds number, and the emitting electrode position on the heat transfer coefficient and preesure drop is evaluated. The numerical results show that the heat transfer coefficient with the presence of electric field increases with the applied voltage but decreases when the Reynolds number are augmented. Moreover, reduction of distance between the emitting electrode and the step edge can significantly effect on the heat transfer enhancement and variations in pressure drop.

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References

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Journal of Solid and Fluid Mechanics
Volume 5, Issue 2 - Serial Number 2
July and August 2015
Pages 233-248

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