Two series of nanofluids were prepared by the researchers, using water as the carrier fluid, and Al2O3 and TiO2 as the nanoparticles; up to 6% particle volume fraction was used. The thermal conductivity and thermal diffusivity of the nanofluids were measured using the transient plane source (TPS) technique, and dynamic viscosity was also measured. The amount of nanoparticle volume fraction affected the value of thermal conductivity, but the nanoparticle cluster ...
Nanofluids and nanorefrigerants are relatively new materials used for a variety of purposes. Specifically, nanorefrigerants are investigated in this study and the authors wanted to devise a theoretical model that could be used to predict the thermal conductivity of nanorefrigerants and nanofluids both. By using the TPS technique the researchers were able to obtain experimental data for the thermal conductivities of a series of nanorefrigerants and through the use of ...
The analysis of a pultruded E-glass reinforced polyester (GFRP) composite is performed by TGA, DSC and DMA methods. The data obtained from these analysis methods agreed well with theoretical models applied to the GFRP. The specific heat capacity of the composite was found to decrease over heating and the decomposition process....
In this paper silica aerogels were synthesized using solvent exchange and surface modification of wet gels from waterglass using IPA/TMCS/n-Hexane solution. The densities, porosities, and specific surface areas were measured. Three different mixing methods were employed to determine their effect on the thermal and mechanical properties of the aerogel. Thermal conductivity testing revealed thermal conductivity readings ranging from 0.03–0.12 W/m·K....
In this article, researchers studied the effect of particle shape on the thermal conductivity of copper reinforced polymer composites. Short-fiber shaped polyamide composites with filler content ranging from 0 to 30 % were measured, alongside of polyamides containing 0 to 60 % filler, shaped as spheres and plates. When the filler content is low, particles are not interacting with each other, and therefore the thermal conductivity is low. As the filler percentage increases to 10%, an immediate ...
