2021 Volume 35 Issue 3 Pages 76-82
This study reports the results of comparative evaluation of the measured and theoretical values of the thermal conductivity of a carbon nanotube-dispersed fluid in which multi-walled carbon nanotubes, MWCNT, with extremely high thermal conductivity are dispersed in distilled water. The thermal conductivity of MWCNT dispersed water was measured by the wire heating method with the mass composition ratio and temperature as parameters. The ratio of thermal conductivity of the dispersoid to the continuous phase of this test sample is unprecedentedly large, which is a range that has never been evaluated in other study. The test MWCNT has a very thin and long shape, and is considered to be dispersed in the continuous phase in a deformed and interlaced state. Therefore, a model suitable for estimating the thermal conductivity of MWCNT dispersed water was examined by comparing the experimentally measured values with the theoretically calculated values. The thermal conductivity of the MWCNT dispersed water was measured to be higher than that of the single-phase water, and the results were in good agreement with the values estimated by the Rayleigh model with a cylindrical arrangement or Hamilton model equation.
