Tahmid, K.T. and Mahmud, M.S. 2025. Numerical Study of Heat Transfer Characteristics in Shell-and-Tube Heat Exchangers with Different Tube Geometries: A Comparative Analysis. SciEn Conference Series: Engineering. 3, (Nov. 2025), 525–530. DOI:https://doi.org/10.38032/scse.2025.3.139.