NATURAL CONVECTION HEAT TRANSFER IN NANOFLUIDS - A NUMERICAL STUDY

被引:0
作者
Rashmi, W. [1 ]
Ismail, A. F. [1 ]
Asrar, W. [1 ]
Khalid, M. [1 ]
Faridah, Y. [1 ]
机构
[1] Int Islamic Univ Malaysia, Kuala Lumpur 50728, Malaysia
来源
PROCEEDINGS OF THE ASME FLUIDS ENGINEERING DIVISION SUMMER CONFERENCE -2008, VOL 1, PT A AND B | 2009年
关键词
Nanofluids; Al2O3-water; CFD; thermal conductivity; THERMAL-CONDUCTIVITY; FLUIDS;
D O I
暂无
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
Natural convection heat transfer in nanofluids has been investigated numerically using computational fluid dynamics (CFD) approach. Analytical models that describe molecular viscosity, density, specific heat, thermal conductivity and coefficient of thermal expansion have been considered in terms of volume fraction and size of nanoparticles, size of base fluid molecule and temperature. The uniform suspensions of different concentrations of Al2O3 in base fluid (water) are considered as nanofluids. Thermal conductivity of the nanofluids has been obtained by solving the governing equations in conjunction with Kinetic model and interfacial layer model using FLUNET 6.3. Numerical simulations have been carried out in a closed pipe for L/D=1.0. The numerical values of k have also been compared with the experimental values available in the literature. Both the models gave similar predictions with experimentally compared values of k.
引用
收藏
页码:269 / 273
页数:5
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