The goal of this study is to evaluate the computational fluid dynamic (CFD) predictions of friction factor and Nusselt number from six different low Reynolds number k–ε (LRKE) models namely Chang–Hsieh–Chen (CHC), Launder–Sharma (LS), Abid, Lam–Bremhorst (LB), Yang–Shih (YS), and Abe–Kondoh–Nagano (AKN) for various heat transfer enhancement applications. Standard and realizable k–ε (RKE) models with enhanced wall treatment (EWT) were also studied. CFD predictions of Nusselt number, Stanton number, and friction factor were compared with experimental data from literature. Various parameters such as effect of type of mesh element and grid resolution were also studied. It is recommended that a model, which predicts reasonably accurate values for both friction factor and Nusselt number, should be chosen over disparate models, which may predict either of these quantities more accurately. This is based on the performance evaluation criterion developed by Webb and Kim (2006, Principles of Enhanced Heat Transfer, 2nd ed., Taylor and Francis Group, pp. 1–72) for heat transfer enhancement. It was found that all LRKE models failed to predict friction factor and Nusselt number accurately (within 30%) for transverse rectangular ribs, whereas standard and RKE with EWT predicted friction factor and Nusselt number within 25%. Conversely, for transverse grooves, AKN, AKN/CHC, and LS (with modified constants) models accurately predicted (within 30%) both friction factor and Nusselt number for rectangular, circular, and trapezoidal grooves, respectively. In these cases, standard and RKE predictions were inaccurate and inconsistent. For longitudinal fins, Standard/RKE model, AKN, LS and Abid LRKE models gave the friction factor and Nusselt number predictions within 25%, with the AKN model being the most accurate.
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Research-Article
A Comparative Study of Performance of Low Reynolds Number Turbulence Models for Various Heat Transfer Enhancement Simulations
Ankit Tiwari,
Ankit Tiwari
Department of MNE,
Penn State,
59 Old Lyme Drive Apartment 1,
Buffalo, NY 14221
e-mail: ankittalks@gmail.com
Penn State,
59 Old Lyme Drive Apartment 1,
Buffalo, NY 14221
e-mail: ankittalks@gmail.com
1Corresponding author.
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Savas Yavuzkurt
Savas Yavuzkurt
Search for other works by this author on:
Ankit Tiwari
Department of MNE,
Penn State,
59 Old Lyme Drive Apartment 1,
Buffalo, NY 14221
e-mail: ankittalks@gmail.com
Penn State,
59 Old Lyme Drive Apartment 1,
Buffalo, NY 14221
e-mail: ankittalks@gmail.com
Savas Yavuzkurt
1Corresponding author.
2Present address: Gentherm Inc., Buffalo, NY 14221.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received October 21, 2018; final manuscript received March 20, 2019; published online May 14, 2019. Assoc. Editor: Srinath V. Ekkad.
J. Heat Transfer. Jul 2019, 141(7): 071902 (12 pages)
Published Online: May 14, 2019
Article history
Received:
October 21, 2018
Revised:
March 20, 2019
Citation
Tiwari, A., and Yavuzkurt, S. (May 14, 2019). "A Comparative Study of Performance of Low Reynolds Number Turbulence Models for Various Heat Transfer Enhancement Simulations." ASME. J. Heat Transfer. July 2019; 141(7): 071902. https://doi.org/10.1115/1.4043305
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