CFD investigation of the impacts of variation in geometry of twisted tape on heat transfer and flow characteristics of water in tubes

Oni, T. O. and Paul, M. C. (2016) CFD investigation of the impacts of variation in geometry of twisted tape on heat transfer and flow characteristics of water in tubes. Heat Transfer: Asian Research, 45(5), pp. 482-498. (doi:10.1002/htj.21216)

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Abstract

In this research paper, the influence of variations in geometry of tape insert on thermal performance and flow characteristics of water inside tubes is investigated by means of computational fluid dynamics (CFD). The tape considered is alternate-axis triangular cut twisted tape. The perimeter of the cuts on the tape, the pitch of the tape and the width of the tape were varied. Turbulent flow is considered and uniform heat flux is imposed on the walls of the tubes. The RNG turbulence model is selected for the simulations and RANS equations are applied to render the Navier-Stokes equations tractable. The findings of the investigations indicated that the thermal performance of all the tubes fitted with twisted tape is better than that of the tube without twisted tape, and also that the performance is influenced by the geometry of the twisted tape. In particular, the thermal performance diminishes as the tape pitch increases but it is augmented by an increase in the size of the cuts on the tape and an increase in the width of the tape.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Paul, Dr Manosh
Authors: Oni, T. O., and Paul, M. C.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Heat Transfer: Asian Research
Publisher:Wiley
ISSN:1099-2871
ISSN (Online):1523-1496
Published Online:27 January 2016
Copyright Holders:Copyright © 2016 Wiley
First Published:First published in Heat Transfer: Asian Research 45(5): 482-498
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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