Najim, Farqad T. , trans. “Effect of Inlet Velocity on The Entrance Length of Laminar and Turbulent Flow in A Circular Pipe ”. Babylonian Journal of Mechanical Engineering 2024 (October 21, 2024): 81–90. Accessed September 1, 2025. https://journals.mesopotamian.press/index.php/BJME/article/view/637.