Effect of variable fluid properties on natural convection of nanofluids in a cavity with linearly varying wall temperature
type: Item
instance of: scholarly article
title: Effect of variable fluid properties on natural convection of nanofluids in a cavity with linearly varying wall temperature
zbMATH Open document ID: 1394.76139
DOI: 10.1155/2015/391786
author: Poo Balan Ganesan
author: S. Sivasankaran
author: K. K. Viswanathan
author: M. C. Bhuvaneswari
published in: Mathematical Problems in Engineering
publication date: 2018-08-27T00:00:00Z
review text: Summary: 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.
Mathematics Subject Classification ID: 76T20
zbMATH DE Number: 6926254
MaRDI profile type: Publication
full work available at URL: https://doi.org/10.1155/2015/391786
OpenAlex ID: W1994177804
Wikidata QID: Q59118458
cites work: Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluids.
cites work: Buoyancy-driven heat transfer of water-based Al\(_{2}\)O\(_{3}\) nanofluids in a rectangular cavity
cites work: Numerical simulation of natural convection of nanofluid in a square enclosure: Effects due to uncertainties of viscosity and thermal conductivity
description: scientific article; zbMATH DE number 6926254