In this paper Lattice Boltzmann simulation of natural convection in an open enclosure which subjugated to water/copper nanofluid has been investigated. Calculations were performed for Rayleigh numbers (Ra=10⁴ - 10⁶), volume fractions of nanoparticles (0 ≤ φ ≤ 0.05) and open enclosure aspect ratios (0:5 ≤ A ≤ 2). The comparisons show that the average Nusselt number increases with augmentation of Rayleigh number and the volume fraction of nanoparticles for whole ranges of aspect ratios. The average Nusselt number decreases as the aspect ratio increases at various Rayleigh numbers and different the nanoparticle volume fractions. But generally the most effect of nanoparticles on heat transfer enhancement is observed at the aspect ratio of A = 2. Also nanoparticles influence the heat transfer less at Ra = 10⁵ among studied Rayleigh numbers.

Item Type:	Refereed Article
Keywords:	convection, nanofluid
Research Division:	Engineering
Research Group:	Fluid mechanics and thermal engineering
Research Field:	Experimental methods in fluid flow, heat and mass transfer
Objective Division:	Energy
Objective Group:	Energy transformation
Objective Field:	Energy transformation not elsewhere classified
UTAS Author:	Kefayati, GHR (Dr Gholamreza Kefayati)
ID Code:	128031
Year Published:	2012
Web of Science® Times Cited:	82
Deposited By:	Engineering
Deposited On:	2018-08-28
Last Modified:	2018-10-15
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