This article outlines the effect of adding Al2O3 and Cu nanoparticles to water and measuring the thermal conductivities and viscosities of the mixtures. The effect of pH was taken into account and it was found that there are optimal pH values for each of the nanoparticle mixtures that give the highest thermal conductivities and lowest viscosities. Research shows that thermal conductivity and viscosity are closely related to each other. ...
Author(s): Xian-Ju Wang, Xin-Fang Li
This study looks at the effects of pH on heat transfer, among other things, of nanofluids. Over 20% enhancement of thermal conductivity was noted with nanofluids containing 3wt% zirconium dioxide and titanium dioxide. Also noted, was the influence of pH on the stability of the nanofluids. The Derjaguin-Landau-Verwey-Overbeek theory states that nanoparticles become unstable, form clusters and precipitate, when their pH is near the isoelectric point. This leads to large clusters ...
Author(s): Carine Tchamakam Wamkam, Haiping Hong, Michael Kwabena Opoku, Pauline Smith
This study aims to use Boron Nitride (BN) materials as thermo-conductive fillers to enhance the heat transfer in fluids. For this study, BN nanotubes, and nanospheres were added to fluids, to test for individual thermal enhancements. With the addition of BN nanotubes to water, the thermal conductivity of the fluid was enhanced by 2.6 times. Also noted, was the increase in conductivity of the fluid with the addition of BN nanospheres. ...
Author(s): Chunyi Zhi, Dmitri Golberg, Yibin Xu, Yoshio Bando
The Transient Plane Source method was used in this research article to measure the thermal conductivity of an Ionanofluid, highly stable graphene (GE)-based nanofluid, at various temperatures. Researchers took special note of the effects of temperature, GE loading, presence of multi-walled carbon nanotubes (MWCNTs), on the thermal conductivity of the nanofluid. Through experimental testing, it was determined that the nanofluid elicited a higher thermal conductivity, as compared to its ...
Author(s): F. Wang, J. Shi, L. Han, W. Ma, X. Fang, Z. Zhang
Many limitations exist within the development of energy efficient heat transfer fluids; however, low thermal conductivity of these fluids is the main issue. In order to improve the thermal conductivity of these heat transfer fluids, researchers in this study performed strenuous research and ultimately created a new and improved fluid. In this newly designed material, nanoparticles and carbon-nanotubes (CNTs) were suspended within the fluid, aiming to increase the fluids thermal ...
Author(s): F. D. S. Marquis, L. P. F. Chibante
