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
As technology advances, the need for inexpensive polymer-based composites possessing high thermal conductive properties has become more and more important. Previously, the addition of thermal conductive particles, such as alumina, boron nitride and alumina nitride, has caused an increase in the thermal conductivity of the composite. Although an increase in thermal conductivity is present, an increase in fabrication costs is also experienced as a higher quantity of particles is required, ...
Author(s): Chen-Chi M. Ma, Chih-Chun Teng, Chu-Hua Lu, Kuo-Chan Chiou, Min-Chien Hsiao, Ming-Yu Yen, Shie-Heng Lee, Shin-Yi Yang, Tzong-Ming Lee
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
In mold fluxes, fluorine is generally added to reduce viscosity and solidification. The fluorine however, tends to cause corrosion of the casting machine and leads to environmental pollution. To potentially rid this design of these issues, researchers in this study examined the Fluorine-free mold flux, in a specific glass system. Properties such as viscosity, thermal conductivity and crystallization behaviour were all analyzed and compared to the values for the commercial ...
Author(s): Dong-Han Lee, Dong-Won Shin, Jong-Min Park, Jung-Wook Cho, Se-Young Choi, Soon-Yong Choi
Polystyrene (PS)/graphite thermal conductive nano-composites were prepared to verify the high thermal conductivity values with the addition of graphite, as well as the layered structure. The thermal conductivity of PS improved greatly in the presence of the graphite. Researchers used the Maxwell-Eucken model and the Agari model to evaluate thermal conductivity. For the purpose of improving the interfacial compatibility of PS/graphite, three PS fabrication methods were introduced to ...
Author(s): H. Tu, L. Ye
