“BY USING HELICAL BAFFLE ON THE ANNULAR SPACE OF A DOUBLE PIPE HEAT EXCHANGER TO IMPROVE THE HEAT TRANFER CHARACTERISTICS” (2020) INTERNATIONAL JOURNAL OF PETROCHEMICAL ENGINEERING AND TECHNOLOGY (IJPET), 1(1), pp. 1–4. Available at: https://lib-index.com/index.php/IJPET/article/view/IJPET_01_01_001 (Accessed: 14 March 2025).