Study on stabilities, thermophysical properties and natural convective heat transfer characteristics of TiO2-water nanofluids

TiO 2 -water nanofluids with different mass fractions ( ω  = 0.1 wt%, ω  = 0.3 wt% and ω  = 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,...

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Published in:Indian journal of physics 2018-04, Vol.92 (4), p.461-478
Main Authors: Qi, Cong, Wan, Yong Liang, Wang, Gui Qing, Han, Dong Tai
Format: Article
Language:English
Subjects:
Astrophysics and Astroparticles
Convective heat transfer
Electron microscopes
Free convection
Heat transfer
Heating
Nanofluids
Nanoparticles
Original Paper
Physics
Physics and Astronomy
Properties (attributes)
Thermophysical models
Thermophysical properties
Titanium dioxide
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cited_by cdi_FETCH-LOGICAL-c316t-3aa87c47362d34dc1e1cf6ce41f9feae8655da123ec9c149bc96a3a877939d23
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container_title Indian journal of physics
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description TiO 2 -water nanofluids with different mass fractions ( ω  = 0.1 wt%, ω  = 0.3 wt% and ω  = 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 TiO 2 -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.
doi_str_mv 10.1007/s12648-017-1122-z
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subjects Astrophysics and Astroparticles
Convective heat transfer
Electron microscopes
Free convection
Heat transfer
Heating
Nanofluids
Nanoparticles
Original Paper
Physics
Physics and Astronomy
Properties (attributes)
Thermophysical models
Thermophysical properties
Titanium dioxide
title Study on stabilities, thermophysical properties and natural convective heat transfer characteristics of TiO2-water nanofluids
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