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Effect of Full Length Twisted Tape Inserts on Heat Transfer and Friction Factor Enhancement with Fe3O4 Magnetic Nanofluid Inside a Plain Tube: An Experimental Study

L. Syam, Sundar and Kumar, N. T. Ravi and Naik, M. T. and Sharma, K. V. (2012) Effect of Full Length Twisted Tape Inserts on Heat Transfer and Friction Factor Enhancement with Fe3O4 Magnetic Nanofluid Inside a Plain Tube: An Experimental Study. International Journal of Heat and Mass Transfer, 55 (11-12). pp. 2761-2768. ISSN 0017-9310

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Abstract

Turbulent convective heat transfer and friction factor characteristics of magnetic Fe3O4 nanofluid flowing through a uniformly heated horizontal circular tube with and without twisted tape inserts are estimated experimentally. Experiments are conducted in the particle volume concentration range of 0 < u < 0.6%, twisted tape inserts of twist ratio in the range of 0 < H/D < 15and Reynolds number range of 3000 < Re < 22000. Heat transfer and friction factor enhancement of 0.6% volume concentration of Fe3O4 nanofluid in a plain tube with twisted tape insert of twist ratio H/D = 5 is 51.88% and 1.231 times compared to water flowing in a plain tube under same Reynolds number. Generalized regression equation is presented for the estimation of Nusselt number and friction factor for both water and Fe3O4 nanofluid in a plain tube and with twisted tape inserts under turbulent flow condition.

Item Type: Article
Uncontrolled Keywords: Fe3O4 nanofluid; Forced convection; Twisted tape insert; Heat transfer enhancement
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Ms. Hazima Anuar
Date Deposited: 30 May 2016 02:35
Last Modified: 31 May 2016 04:09
URI: http://umpir.ump.edu.my/id/eprint/6818
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