期刊
INDIAN JOURNAL OF PHYSICS
卷 92, 期 4, 页码 461-478出版社
INDIAN ASSOC CULTIVATION SCIENCE
DOI: 10.1007/s12648-017-1122-z
关键词
Nanofluids; Thermophysical properties; Natural convection; Enhanced heat transfer; Two-phase lattice Boltzmann
资金
- National Natural Science Foundation of China [51606214]
- Fundamental Research Funds for the Central Universities [2015XKMS063]
TiO2-water nanofluids with different mass fractions (omega = 0.1 wt%, omega = 0.3 wt% and omega = 0.5 wt%) are prepared respectively, and the stabilities are studied by scanning electron microscope, transmission electron microscope, dynamic analysis method and settlement observation method. Additionally, thermophysical properties of nanofluids are discussed, and models of thermophysical properties are deduced. Then, an experimental installation and a two-phase lattice Boltzmann model for natural convection heat transfer are established in this paper and the effects of cavity ratio, heating power and nanoparticle mass fraction on heat transfer are discussed respectively. It can be obtained that the thermal conductivities of TiO2-water nanofluids can be improved by 5.23% to the utmost extent. However, the heat transfer can be enhanced by 34.2% in the maximum with the increase of nanoparticle mass fraction at the lowest heating power and the largest cavity ratio.
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