This experiment outlined an investigation into heat transfer of two water-based nanofluids; H2O-Al2O3 and H2O-Cu. The absorbency and thermal conductivity of both nanofluids was measured under various pH values and sodium dodecylbenzene sulfonate (SDBS) concentrations, to determine whether an effect on heat transfer is present. The results concluded that the stability and thermal conductivity of the nanofluids are greatly dependent on the pH values and SDBS concentrations ...
Author(s): Shuo Yang, Xian-Ju Wang, Xin-Fang Li, Xinfang Li
The thermal conductivity of heat transfer nanofluids has been determined to increase by 10%, when containing metal oxide nanoparticles and carbon nanotubes. The fluid viscosity of the nanofluids is relatively the same as water, and therefore cannot not account for the increase in thermal conductivity. However, the fashion in which the metal oxide particles conglomerate within the fluid could be a potential explanation for the spike. Results show that under the ...
Author(s): B. Mannhalter, B. Wright, D. Thomas, H. Hong, J. Kellar, J. Wensel, P. Smith, W. Cross, W. Douglas, W. Roy
This study primarily focuses on the electrical and thermal conductivity of nanoparticle filled epoxy resins. Modification of polymers on a nanstructure level has revealed a new world of possibilities for multi-functional materials. Research has found that carbon nanotubes may have the potential to improve mechanical performance of conductive polymers. This research studies the thermal performance of the resins with respect to various types of carbon nanotubes, various concentrations of filler ...
Author(s): B. Fiedler, F. H. Gojny, H. Windle, I. A. Kinloch, K. Schulte, M. H. G. Wichmann, W. Bauhofer
In this study, soft sphere surfactants, with varying head group charges and alkyl chain lengths, were investigated for their effects on the thermal conductivity, rheology, density, contact angle and refractive index of nanofluids. It was noted that the thermal conductivity of the ionic surfactant micelles follows the effective medium theory of poor thermal conductance, with interfacial resistance towards infinity. It was also determined that the longer the alkyl chains on ...
Author(s): John Philip, S. A. Angayarkanni
The field of nanofluids is relatively new, however researchers in this article aimed to research their thermal conductivity and dispersion behaviours. A nanofluid consists of free-floating, solid nanoparticles suspended in a base fluid. Specifically, Al2O3-H2O nanofluids were investigated in this study. Using a thermal constants analyzer, the thermal conductivities of various modifications of nanofluids were measured. Research concluded that pH and concentrations of SDBS dispersants have a ...
Author(s): D. Zhu, H. Li, J. Gao, N. Wang, X. Li, X. Wang
