BY USING HELICAL BAFFLE ON THE ANNULAR SPACE OF A DOUBLE PIPE HEAT EXCHANGER TO IMPROVE THE HEAT TRANFER CHARACTERISTICS. IJPET [Internet]. 2020 Jan. 10 [cited 2025 Mar. 14];1(1):1-4. Available from: https://lib-index.com/index.php/IJPET/article/view/IJPET_01_01_001