...) on the bottom wall of the duct, which is located 530 mm away from the entry. Multiple spiral-shaped semi-conical ribs incorporated as artificial roughness, shown in Figs. 2( a ) and 2( b ) , were attached to the aluminum plate using thermal paste and rivets. The roughened side of the plate is positioned...

... nergy E ngineering : I ncluding W ind E nergy and B uilding E nergy C onservation . 19 09 2022 16 06 2023 19 06 2023 18 07 2023 Joukowski airfoil artificial roughness ribs solar air heater thermohydraulic performance thermogeometric performance absorber...

...Dhananjay Kumar; Laljee Prasad The use of artificial roughness is an efficient and commercial way to appreciate the thermal performance from the collector to the air in solar air heater ducts, for numerous applications such as space-heating, crop-drying, and seasoning of timber industrial purpose...