TY - JOUR
T1 - Lattice Boltzmann simulation of natural convection in an open enclosure subjugated to water/copper nanofluid
AU - Kefayati, Gholamreza
AU - Hosseinzadeh, S.F.
AU - Gorji, M
AU - Sajjadi, H
PY - 2012/2
Y1 - 2012/2
N2 - 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.
AB - 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.
KW - Average Nusselt number
KW - Lattice Boltzmann method
KW - Nanofluid
KW - Natural convection
KW - Open enclosure
UR - http://www.scopus.com/inward/record.url?scp=81255185309&partnerID=8YFLogxK
U2 - 10.1016/j.ijthermalsci.2011.09.005
DO - 10.1016/j.ijthermalsci.2011.09.005
M3 - Article
VL - 52
SP - 91
EP - 101
JO - International Journal of Thermal Sciences
JF - International Journal of Thermal Sciences
SN - 1290-0729
IS - 1
ER -