“EXPERIMENTAL INVESTIGATION OF ENHANCEMENT HEAT TRANSFER OF INSERT TWISTED TAPE OF CIRCLAR CUT WITH WIRE COIL IN THE DOUBLE PIPE HEAT EXCHANGER”, J. eng. sustain. dev., vol. 22, no. 3, pp. Pages 23–33, May 2018, Accessed: May 15, 2024. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/321