TY - JOUR
T1 - Lattice Boltzmann simulation of natural convection in tall enclosures using water/ SiO2 nanofluid
AU - Kefayati, Gholamreza
AU - Hosseinzadeh, S.F.
AU - Gorji, M
AU - Sajjadi, H
PY - 2011/7
Y1 - 2011/7
N2 - Natural convection in enclosures using water/SiO2 nanofluid is simulated with Lattice Boltzmann method (LBM). This investigation compared with other numerical methods and found to be in excellent agreement. This study has been carried out for the pertinent parameters in the following ranges: the Rayleigh number of base fluid, Ra=103-105, the volumetric fraction of nanoparticles between 0 and 4% and aspect ratio (A) of the enclosure between 0.5 and 2. The thermal conductivity of nanofluids is obtained on basis of experimental data. The comparisons show that the average Nusselt number increases with volume fraction for the whole range of Rayleigh numbers and aspect ratios. Also the effect of nanoparticles on heat transfer augments as the enclosure aspect ratio increases.
AB - Natural convection in enclosures using water/SiO2 nanofluid is simulated with Lattice Boltzmann method (LBM). This investigation compared with other numerical methods and found to be in excellent agreement. This study has been carried out for the pertinent parameters in the following ranges: the Rayleigh number of base fluid, Ra=103-105, the volumetric fraction of nanoparticles between 0 and 4% and aspect ratio (A) of the enclosure between 0.5 and 2. The thermal conductivity of nanofluids is obtained on basis of experimental data. The comparisons show that the average Nusselt number increases with volume fraction for the whole range of Rayleigh numbers and aspect ratios. Also the effect of nanoparticles on heat transfer augments as the enclosure aspect ratio increases.
KW - Average Nusselt number
KW - Lattice Boltzmann method
KW - Nanofluid
KW - Natural convection
UR - http://www.scopus.com/inward/record.url?scp=79957827664&partnerID=8YFLogxK
U2 - 10.1016/j.icheatmasstransfer.2011.03.005
DO - 10.1016/j.icheatmasstransfer.2011.03.005
M3 - Article
SN - 0735-1933
VL - 38
SP - 798
EP - 805
JO - International Communications in Heat and Mass Transfer
JF - International Communications in Heat and Mass Transfer
IS - 6
ER -