Lattice Boltzmann simulation of natural convection in an open enclosure subjugated to water/copper nanofluid

Gholamreza Kefayati; S.F. Hosseinzadeh; M Gorji; H Sajjadi

doi:10.1016/j.ijthermalsci.2011.09.005

Lattice Boltzmann simulation of natural convection in an open enclosure subjugated to water/copper nanofluid

Gholamreza Kefayati, S.F. Hosseinzadeh, M Gorji, H Sajjadi

Research output: Contribution to journal › Article › peer-review

97 Citations (Scopus)

Abstract

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 = 10⁴-10 ⁶), 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.

Original language	English
Pages (from-to)	91-101
Number of pages	11
Journal	International Journal of Thermal Sciences
Volume	52
Issue number	1
DOIs	https://doi.org/10.1016/j.ijthermalsci.2011.09.005
Publication status	Published - Feb 2012

Keywords

Average Nusselt number
Lattice Boltzmann method
Nanofluid
Natural convection
Open enclosure

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10.1016/j.ijthermalsci.2011.09.005

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abstract = "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 = 104-10 6), 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.",

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AU - Sajjadi, H

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KW - Average Nusselt number

KW - Lattice Boltzmann method

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KW - Open enclosure

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Lattice Boltzmann simulation of natural convection in an open enclosure subjugated to water/copper nanofluid

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Keywords

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