NDLI: Experimental investigation on convective heat transfer and friction factor in a helically coiled tube with Al$_{2}$O$

Content Provider	SpringerLink
Author	Mukesh Kumar, P. C. Kumar, J. Suresh, S.
Copyright Year	2013
Abstract	In this study, the heat transfer and friction factor of a shell and helically coiled tube heat exchanger using Al$_{2}$O$_{3}$ / water nanofluid at 0.1%, 0.4% and 0.8% particle volume concentration were tested. The test was conducted under laminar flow condition at 5100 < Re$_{i}$ < 8700. It is found that the overall heat transfer coefficient, inner heat transfer coefficient and experimental inner Nusselt number are 24%, 25% and 28%, respectively, higher than water at 0.8% particle volume concentration of nanofluid. It is observed that the presence of nanoparticles further intensify the formation of secondary flow and proper mixing of fluid when nanofluid passes through the helically coiled tube. Apart from further flow intensification, higher thermal conductivity of nanofluid and random movement of nanoparticles contribute to the enhanced heat transfer coefficient. Also found that the friction factor increases over particle volume concentration and this is due to increased nanofluid viscosity while increasing particle volume concentration.
Starting Page	239
Ending Page	245
Page Count	7
File Format	PDF
ISSN	1738494X
Journal	Journal of Mechanical Science and Technology
Volume Number	27
Issue Number	1
e-ISSN	19763824
Language	English
Publisher	Korean Society of Mechanical Engineers
Publisher Date	2013-01-19
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	Al$_{2}$O$_{3}$ water nanofluid Effective thermal conductivity Helically coiled tube Nanofluid viscosity Particle volume concentration flow Mechanical Engineering Vibration, Dynamical Systems, Control Industrial and Production Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanical Engineering Mechanics of Materials

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