Enhanced Thermal–Hydraulic Performance in Tubes Fitted With Energy Promoters: Effects of Geometry and Swirl Flow Generation
Abdelmadjid F. Salim B. Tolephih M.H. Khalil D. Abdullah O.I. Noureddine M.
2026John Wiley and Sons Inc
Heat Transfer
2026
Enhancing heat-transfer efficiency in compact heat exchangers is essential for reducing energy consumption and improving overall system performance. This research investigates the behavior of an innovatively designed thermal and hydraulic energy promoter (EP), mounted on the inner wall of a circular tube, to improve heat transfer and minimize pressure loss. Water was used as the simulation fluid at Reynolds numbers between 4000 and 20,000, employing the Shear Tension Transmission k–ω perturbation model in ANSYS Fluent. The EP generates strong vortices that intensify the fluid mixing near the tube wall. Compared with a smooth tube, the Nusselt number increased by 1.9–3.4, while the coefficient of friction increased by 2.9–4.8. This further indicates an improvement in overall efficiency, exceeding the Performance Evaluation Criterion value of 1 in all cases (1.1–2.6). The promoter height of 1 mm achieved the best performance in terms of both increased heat transfer and reduced pressure. The flow analysis revealed the formation of secondary vortices and high-kinetic-energy regions, which are key optimization mechanisms. Compared with traditional passive methods, such as ribs and grooves, the proposed catalyst concept offers an effective solution for improving thermal performance without inducing excessive mechanical stress.
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Laboratory of Transportation and Environment Engineering (LITE), Department of Transport Engineering, Université Constantine 1, Constantine, Algeria
Department of Petroleum Engineering, Al-Naji University, Baghdad, Iraq
UDERZA Unit, Technology Faculty, University of El-Oued, El-Oued, Algeria
Department of Energy Engineering, College of Engineering, University of Baghdad, Iraq
Department of Petroleum Engineering, College of Engineering, AL-Naji University, Baghdad, Iraq
Department of Mechanics, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Laboratory of Transportation and Environment Engineering (LITE)
Department of Petroleum Engineering
UDERZA Unit
Department of Energy Engineering
Department of Petroleum Engineering
Department of Mechanics
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