Syed, N. H.; Khan, N. A.; Ahmad, N.; Khan, M.; Ahmad, F.; Humayun, F.; Haq, S.; Alsayer, I. A.; Altuwair, I. A. A CFD Analysis to Investigate the Effect of Inserts on the Overall Heat Transfer Coefficient in a Concentric Tube Heat Exchanger. Eng. Technol. Appl. Sci. Res. 2024, 14, 18077-18085.