CFD Simulation of Heat Transfer Augmentation in a Circular Tube Fitted with Alternative Axis Twisted Tape in Laminar Flow under a Constant Heat Flux. Issue 4 (3rd October 2013)

• Record Type: Journal Article
• Authors: Salman, Sami D.; Kadhum, Abdul Amir H.; Takriff, Mohd S.; Mohamad, Abu Bakar
• Is Part Of: Heat transfer - Asian research. Volume 43:Issue 4(2014)
• Page Start: 384
• Page End: 396
• Publication Date: 2013-10-03
• Subjects: Heat -- Transmission -- Periodicals; Electronic journals; 621.4022
• DOI: 10.1002/htj.21089
• Languages: English
• ISSNs: 1099-2871

Abstract

<abstract abstract-type="main" id="htj21089-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p id="htj21089-para-0001">CFD simulation of heat transfer and friction factor characteristics in a circular tube fitted with twisted tape inserts in laminar flow and constant heat flux is conducted using FLUENT version 6.3.26. Plain and alternate axis twisted tape inserts with twist ratios (<italic>y</italic> = 2.93, 3.91, 4.89) and alternative angles (<italic>β</italic> = 30<sup><italic>°</italic></sup>, 60<sup><italic>°</italic></sup>, 90<sup><italic>°</italic></sup>) have been used for the simulation. The simulated results are matched with the literature correlations for a plain tube with a discrepancy of less than ±8% for Nusselt number and ±6.25% for friction factor. The results also revealed that the heat transfer in terms of the Nusselt number increased with increases of Reynolds number, alternative angles, and decreases of twist ratio. Among the various twist ratios and alternative angles, the twist ratio of <italic>y</italic> = 2.93 and alternative angle <italic>β</italic> = 90<sup><italic>°</italic></sup> offered a maximum heat transfer enhancement. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res, 43(4): 384–396, 2014; Published online 3 October 2013 in Wiley Online Library (<ext-link ext-link-type="uri" xlink:href="http://wileyonlinelibrary.com/journal/htj" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink">wileyonlinelibrary.com/journal/htj</ext-link>). DOI 10.1002/htj.21089</p> </abstract>