Numerical analysis of the EHD driven flow with heat transfer in a smooth channel using multiple collectors

摘要

In the present study, a new design of collecting electrodes is studied for performing a higher performance in EHD phenomena in a smooth channel. The effect of the electric field on the heat transfer enhancement and swirling flow patterns for a new design of multiple collectors in a smooth channel is numerically investigated with 2-D approach. In this regard, the corona device configuration comprises a single fixed emitting wire situated at the centerline of the channel and different grounded electrode arrangements which are in two types of wire and plate. The results indicate that the multi-collector arrangements cause significant changes in the flow pattern, heat transfer coefficient and friction factor. Furthermore, it is found that the thermal enhancement factor has remarkable growth, and EHD efficiency for two types of wire and plate collectors is notable. Besides, as an outstanding result, the electrohy-drodynamic phenomenon has a negative effect on the heat transfer enhancement depending upon the values of Reynolds number and applied electric potential.