Aharwal, K.R.; Gandhi, B.K.; Saini, J.S. - In: Renewable Energy 33 (2008) 4, pp. 585-596
performance of solar air heaters. This paper presents the experimental investigation of heat transfer and friction factor … enhancement in Nusselt number and friction factor is observed to be 2.59 and 2.87 times of that of the smooth duct, respectively …