Effect of Geometric and Flow Parameters on the Performance of Pin-fin Arrays

This investigation pertains to an experimental study of forced convective heat transfer from the array of circular pin-fins attached on a rectangular-horizontal base plate maintained at 50°C placed in a rectangular channel formed the passage for flow of air. The study involved the effect of pin-fins spacing in both stream and span wise directions on the performance of heat sink. The tip clearance effect was also studied. The positions of cylindrical fins arranged in array either in-line or staggered manner. The parameters, i) Reynolds number ranged between 2000 to 25000 ii) inter fin distance varied from 12 mm to 228 mm in both the stream wise (s_y) and span wise(s_x) directions and iii) clearance ratio (C/H) 0.0, 0.5 and 1.0 were used in the study. The dependence of Nusselt number and friction factor on the above parameters is accomplished and the results were matching with previous reports.