S. Najeeb Shehab, “INVESTIGATION THE EFFECT OF ASPECT RATIO ON THE FREE HEAT CONVECTIVE INSIDE A HORIZONTAL HEATED TUBE”, J. eng. sustain. dev., vol. 21, no. 3, pp. 119–135, May 2017, Accessed: Mar. 16, 2025. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/539