BY USING HELICAL BAFFLE ON THE ANNULAR SPACE OF A DOUBLE PIPE HEAT EXCHANGER TO IMPROVE THE HEAT TRANFER CHARACTERISTICS. INTERNATIONAL JOURNAL OF PETROCHEMICAL ENGINEERING AND TECHNOLOGY (IJPET), [S. l.], v. 1, n. 1, p. 1–4, 2020. Disponível em: https://mylib.in/index.php/IJPET/article/view/IJPET_01_01_001.. Acesso em: 22 mar. 2026.