قبيلي ي. “Comparison of Heat Transfer in the Case of Turbulent Flow Between a Duct Without Ribs and a Duct With Semi-Circular Inner Ribs”. Tishreen University Journal -Engineering Sciences Series, vol. 43, no. 3, July 2021, https://journal.tishreen.edu.sy/index.php/engscnc/article/view/10623.