Gürsoy, E.Gürdal, M.Gedik, E.Arslan, K.2024-09-292024-09-2920242578-5486https://hdl.handle.net/20.500.14619/101809th International Symposium on Advances in Computational Heat Transfer, CHT 2024 -- 26 May 2024 through 30 May 2024 -- Istanbul -- 317889Energy, entropy, and exergy analyses have been examined in sudden expansion tube (SET), which used in many thermal applications such as heat exchangers, micro-scale industry application, with both smooth (ST) and convex fin (CFT) surfaces. For the purpose of enhancing the thermal and hydraulic efficiency a ternary approach in which SET, and nanofluid, and convex fin have been employed together. Numerical parametric analyses have been carried out under steady-state, fully developed flow, and constant heat flux conditions with laminar, transitional and turbulent flow regimes (500?Re?10000) using Finite Volume Method (FVM). Two different working fluids as water and ferrofluid (Fe3O4/water) with ?=2.0% volume fraction have used. According to numerical results, the highest increment in the average Nusselt number (Nu) was caused by ferrofluid oc-curred in the laminar flow regime, approximately 7.0%, and its effect on the Darcy friction factor (f) was approximately 4.0%. On the other hand, the average Nu increased nearly twofold under the effect of convex fins at the transitional flow regime. Convex fins severely affected the f, causing an in-crement of nearly 260% in the turbulent flow regime. In the irreversibility analysis, convex fins performed the lowest dimensionless total entropy generation reducing up to 46.0% and increased the second-law efficiency up to 14.0% at Re=2000. Furthermore, the results of first-law efficiency, exergy outlet, exergy loss, and pumping power were investigated in detail and entropy generation results were supported with contours. © 2024, Begell House Inc. All rights reserved.eninfo:eu-repo/semantics/closedAccessConvex finsEnergy analysisEntropy analysisExergy analysisPerformance evaluation criterionQuadruple flow regimeSudden expansion tubeConference Object2-s2.0-85204084313268N/A2652024