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Effect of Variable Fluid Properties on Natural Convection of Nanofluids in a Cavity with Linearly Varying Wall Temperature

Bhuvaneswari, Marimuthu and Ganesan, Poo Balan and Sivasankaran, Sivanandam and Viswanathan, Kodakkal Kannan (2015) Effect of Variable Fluid Properties on Natural Convection of Nanofluids in a Cavity with Linearly Varying Wall Temperature. Mathematical Problems In Engineering . ISSN 1024-123X

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Official URL: http://dx.doi.org/10.1155/2015/391786

Abstract

The present study analyzed convective heat transfer and fluid flow characteristics of nanofluid in a two-dimensional square cavity under different combinations of thermophysical models of nanofluids. The right vertical wall temperature is varying linearly with height and the left wall is maintained at low temperature whereas the horizontal walls are adiabatic. Finite volume method is used to solve the governing equations. Two models are considered to calculate the effective thermal conductivity of the nanofluid and four models are considered to calculate the effective viscosity of the nanofluid. Numerical solutions are carried out for different combinations of effective viscosity and effective thermal conductivity models with different volume fractions of nanoparticles and Rayleigh numbers. It is found that the heat transfer rate increases for Models M1 and M3 on increasing the volume fraction of the nanofluid, whereas heat transfer rate decreases for Model M4 on increasing the volume fraction of the nanoparticle. The difference among the effective dynamic viscosity models of nanofluid plays an important role here such that the average Nusselt number demonstrates an increasing or decreasing trend with the concentration of nanoparticle.

Item Type:Article
Uncontrolled Keywords:finite volume method, flow of fluids, heat convection, heat transfer, nanoparticles, natural convection
Subjects:A General Works
ID Code:58397
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:08 Mar 2017 15:05

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