Author : Mohmad Iqbal and Mohd Irfan

Heat transfer enhancement in a channel with trapezoidal bottom wall using sharp edged wavy plate has been investigated experimentally. The experiments were performed for different Reynolds numbers 17037.1, 19799.9, and 26246.3 by varying heat flux. The results shows that the channel with trapezoidal bottom wall, the average Nusselt number increases by 30-55% at different heat flux and Reynolds numbers, but by using a wavy plate the average Nusselt number increased by 40-75% as compared to plane duct. The increase in Reynolds number leads to enhancement in the heat transfer coefficient. But there is a moderate increase in the pressure drop as compared to plane plate.

Keywords: Heat transfer enhancement, forced convection, Trapezoidal bottom wall, Channel flow.

Article published in International Journal of Current Engineering and Technology, Vol.9, No.2 (March/April 2019)