id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cana-5110	Varinder Singha	Heat Transfer and Friction Characteristics of Rectangular Solar Air Heater Duct using Square Protrusions as Artificial Roughness	2025	10	.pdf	application/pdf	2587	126	48	However in case of protruded absorber plate friction factor is more as compared to smooth absorber plate. 3: Schematic of roughened absorber plate.	cache/cana-5110.pdf	txt/cana-5110.txt