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Effects of Pin–Fin Shape on Heat Transfer, Flow Behavior and Pressure Loss in a Swirl Tube

  • S.I. : Computations & Experiments on Dynamics of Complex Fluid & Structure
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Abstract

A numerical investigation has been carried out on effects of pin–fin shape on heat transfer, flow behavior and pressure loss characteristics in swirl cooling tubes. Pin–fin shapes were circular, rectangular and perforated rectangular. Using a steady-state approach, the governing equations have been solved by ANSYS FLUENT. Polyhedral meshes have been selected in this study; SST k–ω, furthermore, has been chosen for numerical investigation and different Reynolds numbers from 10,000 to 40,000 have been investigated. A comparison between swirl tubes with three different pin–fin shapes and a smooth tube showed that all three pin–fin shapes could improve heat transfer significantly; in fact, heat transfer over the roughened swirl tubes increased by about 10–24% compared to the smooth swirl tube depending on the pin–fin shapes and the Reynolds numbers. Although having more pressure loss in comparison with other pin–fin shapes, perforated rectangular pin–fin had the best performance among different pin–fin structures in terms of heat transfer; that is, it has increased heat transfer approximately by 24% compared to smooth tube. A comparison of the thermal performance factor among pin–fin structures also showed that perforated rectangular pin-fins had the best performance, followed by circular pin-fins. Additionally, interactions between pin-fins and airflow and streamlines have been demonstrated.

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  1. Faculty of Mechanical Engineering, Semnan University, P.O.B. 35131-191, Semnan, Iran

    A. Ravanji & M. Rajabi Zargarabadi

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  1. A. Ravanji
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  2. M. Rajabi Zargarabadi
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Correspondence to M. Rajabi Zargarabadi.

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Ravanji, A., Rajabi Zargarabadi, M. Effects of Pin–Fin Shape on Heat Transfer, Flow Behavior and Pressure Loss in a Swirl Tube. Exp Tech 47, 153–166 (2023). https://doi.org/10.1007/s40799-022-00591-4

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  • DOI: https://doi.org/10.1007/s40799-022-00591-4

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