TI - Optimizing the thermal performance of a double-pipe heat exchanger using twisted tapes with variable cuts and Fe3O4 nanofluid AU - VARMA, K.P.V.K. AU - NAVEEN, N.S. AU - KISHORE, P.S. AU - PUJARI, S. AU - JOGI, K. AU - RAJU, V.D. SO - Journal of Thermal Engineering 2024;10:1184-1197. DO - 10.14744/thermal.0000860