Kumar TS, Thakur N, Kumar A, Mittal V. Use of artificial roughness to enhance heat transfer in solar air heaters – a review. J. energy South. Afr. [Internet]. 2010 Feb. 1 [cited 2024 Jul. 5];21(1):35-51. Available from: https://journals.assaf.org.za/index.php/jesa/article/view/3248