Mohd Umair, S. ., E. . Ansari, S. . Afghan Khan, and . A. . Alrobaian. “On Numerical Investigation of Semi-Empirical Relation Representing Development Length for a Fluid Flow in a Closed Conduit”. CFD Letters, vol. 11, no. 6, Jan. 2021, pp. 63-71, https://www.akademiabaru.com/submit/index.php/cfdl/article/view/3171.