CFD Analysis of Solar Air Heater Duct Artificially Roughned Absorber Plate with Triangular Cross-Sectional Ribs

In a computational fluid dynamics, trails have been conducted on the heat transfer and friction factor for a solar air heater duct with triangular cross-sectional ribs without symmetric gaps. In the CFD investigation, it was assured that the height is 2mm, the pitch (p) of the ribs is 20, the relative roughness pitch (p/e) is 10mm and the angle of attack taken was 60^o. This investigation was carried out on a Reynolds Number (Re) ranging within 4000-12000. Results of this analysis is compared with experimental results of Rajesh maithani and j.s. saini for solar air heater with absorber plate having triangular cross section ribs and absorber plate having v-shaped circular cross section ribs with symmetrical gaps at optimum designed value of ribs.