Gilani S, Al-Kayiem H, Woldemicheal D. Effect of conical pin arrangement on heat transfer efficiency of a free convective solar air heater. J. Mech. Eng. Sci. [Internet]. 2016 Sep. 30 [cited 2024 Jul. 22];10(2):2053-64. Available from: https://journal.ump.edu.my/jmes/article/view/7981