Electro Hydro Dynamic Enhancement of Heat Transfer by Different Working Fluids in a Forced Convection Loop
R.Naresh1, J.M.Babu2, Gowthaman3, Mariappan4
1R.Naresh,  Asst Professor, Dept of Mechanical Engineering, GITAM University.
2J.M. Babu,  Asst Professor, Dept of Mechanical Engineering,  Technical University.
3Dr. Gowthaman, Professor, Dept of Mechanical Engineering,  Technical University.
4Dr. Mariappan, Professor, Dept of Mechanical Engineering,  Technical University.
Manuscript received on November 27, 2013. | Revised Manuscript received on December 13, 2013. | Manuscript published on December 30, 2013. | PP: 396-399 | Volume-3, Issue-2, December 2013. | Retrieval Number:  B2494123213/2013©BEIESP

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Abstract: The flow in channel occupies an important place among the several heating systems. At the same time there is a great need of maintaining and running the system effectively. There are several ways of improvement in thermal efficiency of a system, One of the ways by which we can improve thermal efficiency of the system is to take the advantage of electric field. In the present work the effect of electric field in combination with flow and temperature fields is studied experimentally in a vertical annulus, uniformly heated on the outer wall, a dielectric liquid is allowed to flow in the forced convection loop by using centrifugal pump in a channel. Sharp points are added perpendicular to the inner wire electrode and voltages are applied to it, while the outer wall is grounded. Experimental apparatus is fabricated to conduct the experiments with heat input, voltage supplied and mass flow rate of working fluid as the independent parameters. Flow and temperature distributions are affected by the supplied voltage at the wire electrodes, and effect is more when the fluid is flowing with low Reynolds number. Because of the advantage of considerable dielectric strength of the fluid and comparatively cheaper than silicone based dielectric fluids, transformer oil is selected as working fluid. It is seen from the experiments that the heat transfer coefficient in the presence of electric field increases in relation with the supplied voltage, but decreases with the Reynolds number. From the literature survey it can be concluded that there is a significant enhancement in the heat transfer from the heated surface to the working fluid.
Keywords: In the Present Work the Effect of a System.