A review and analysis on influence of temperature and concentration of nanofluids on thermophysical properties, heat transfer and pumping power

The Prandtl number, Reynolds number and Nusselt number are functions of thermophysical properties of nanofluids and these numbers strongly influence the convective heat transfer coefficient. The pressure loss and the required pumping power for a given amount of heat transfer depend on the Reynolds n...

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Bibliographic Details
Published in:International journal of heat and mass transfer 2012-07, Vol.55 (15-16), p.4063-4078
Main Authors: Vajjha, Ravikanth S., Das, Debendra K.
Format: Article
Language:English
Subjects:
ALUMINUM OXIDE
Applied sciences
Chemistry
Colloidal state and disperse state
COMPOSITES
Condensed matter: structure, mechanical and thermal properties
Convective heat transfer
Energy
Energy. Thermal use of fuels
Euler number
Exact sciences and technology
Fluid dynamics
FLUID FLOW
FLUIDITY
Friction factor
General and physical chemistry
Heat transfer
MICROSTRUCTURES
Mouromtseff number
Nanocomposites
Nanofluids
Nanomaterials
Nanostructure
Nusselt number
Physical and chemical studies. Granulometry. Electrokinetic phenomena
PHYSICAL PROPERTIES
Physics
Prandtl number
PROPERTIES
Reynolds number
SPECIFIC HEAT
Theoretical studies. Data and constants. Metering
Thermal diffusivity
Thermal properties of condensed matter
Thermal properties of small particles, nanocrystals, nanotubes
Thermophysical properties
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Description
Summary:The Prandtl number, Reynolds number and Nusselt number are functions of thermophysical properties of nanofluids and these numbers strongly influence the convective heat transfer coefficient. The pressure loss and the required pumping power for a given amount of heat transfer depend on the Reynolds number of flow. The thermophysical properties vary with temperature and volumetric concentration of nanofluids. Therefore, a comprehensive analysis has been performed to evaluate the effects on the performance of nanofluids due to variations of density, specific heat, thermal conductivity and viscosity, which are functions of nanoparticle volume concentration and temperature. Two metallic oxides, aluminum oxide (Al2O3), copper oxide (CuO) and one nonmetallic oxide silicon dioxide (SiO2), dispersed in an ethylene glycol and water mixture (60:40 by weight) as the base fluid have been studied.
ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2012.03.048