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http://dx.doi.org/10.3795/KSME-B.2010.34.2.153

A Study on the High Temperature Thermal Conductivity Measurement of Nanofluid Using a Two-Phase Model  

Park, Sang-Il (Industrial Energy Efficiency Research Center, Korea Institute of Energy Research)
Lee, Wook-Hyun (Industrial Energy Efficiency Research Center, Korea Institute of Energy Research)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.34, no.2, 2010 , pp. 153-156 More about this Journal
Abstract
The effective thermal conductivity of two-phase materials such as unbonded silica sands saturated with a nanofluid was measured at high temperature using the transient thermal probe method. The nanofluid used in this study was a water-based mixture of 0.1 vol% $Al_2O_3$ nanoparticles with a diameter of 45 nm. The convection problem for fluids was prevented with this measurement method because the fluid was confined to within very small pore spaces. Based on the prediction model for unbonded sands, the thermal conductivities of the saturating nanofluid at high temperatures could be determined with the measured effective thermal conductivities for the two-phase material. In the results, increases in the thermal conductivity ratios of the nanofluid to pure water when temperatures were varied from $30^{\circ}$ to $80^{\circ}C$ were within the range of 4.87%~5.48%.
Keywords
Nanofluid; $Al_2O_3$; Thermal Conductivity; High Temperature; Thermal Probe; Prediction Model;
Citations & Related Records

Times Cited By SCOPUS : 1
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