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Technical Briefs

Forced Convection Boundary Layer Flow Past Nonisothermal Thin Needles in Nanofluids

[+] Author and Article Information
T. Grosan

Department of Applied Mathematics, Babes-Bolyai University, CP 253, 400082 Cluj-Napoca, Romaniatgrosan@math.ubbcluj.ro

I. Pop

Department of Applied Mathematics, Babes-Bolyai University, CP 253, 400082 Cluj-Napoca, Romaniapopm.ioan@yahoo.co.uk

J. Heat Transfer 133(5), 054503 (Feb 02, 2011) (4 pages) doi:10.1115/1.4003059 History: Received August 11, 2010; Revised November 15, 2010; Published February 02, 2011; Online February 02, 2011

The classical problem of forced convection boundary layer flow and heat transfer past a needle with variable wall temperature using nanofluids is theoretically studied. The similarity equations are solved numerically for two types of metallic or nonmetallic, such as copper (Cu) and alumina (Al2O3) nanoparticles in the based fluid of water with the Prandtl number Pr=7 to investigate the effect of the solid volume fraction parameter ϕ of the fluid and heat transfer characteristics. The skin friction coefficient, Nusselt number, and the velocity and temperature profiles are presented and discussed. It is found that the solid volume fraction affects the fluid flow and heat transfer characteristics.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 3

Dimensionless temperature profiles for Al2O3 and Cu nanoparticles when ϕ=0.2, a=0.01, and Pr=7

Grahic Jump Location
Figure 4

Dimensionless velocity profiles for Al2O3 and Cu nanoparticles when ϕ=0.2, a=0.01, and Pr=7

Grahic Jump Location
Figure 2

Dimensionless temperature profiles for Cu nanoparticles

Grahic Jump Location
Figure 1

Dimensionless velocity profiles for Cu nanoparticles

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