This paper presents heat transfer and friction characteristics, and the second law analysis of the convective heat transfer through a rectangular channel with square cross-sectional pin-fins attached over a flat surface. Various clearance ratios (C/H) and interfin distance ratios (Sx/D) were used, and optimum pin-fin arrays that minimize entropy generation were determined. It was found that Nu number based on the projected area decreased with increasing Sx/D and C/H, whereas Nu based on the total heat transfer area increased with increasing Sx/D and with decreasing C/H. The friction factor was found to decrease with increasing Sx/D and C/H. Smaller entropy generation numbers were obtained at lower Reynolds number, higher clearance ratio, and higher interfin spacing ratio. © 2001 Elsevier Science Ltd.
|Number of pages||14|
|Journal||International Communications in Heat and Mass Transfer|
|Publication status||Published - Jul 2001|