Effective thermal conductivityThermal contact resistanceFigure of meritIn this paper, the experimental electrical conductivity and the thermal conductivity of PANI/Ag nanocomposites are firstly measured, both of
Because the solids often possess larger thermal conductivities than fluids, NFs are expected to exhibit considerably larger thermal conductivity than that of the base fluid. The thermal conductivities of Al, Al2O3, Cu, CuO, ZnO, Pd, Au, Ag, CNT, and MWCNT NPs are 204, 27–36, 383, 18...
We describe an optical beam deflection technique for measurements of the thermal diffusivity of fluid mixtures and suspensions of nanoparticles with a precision of better than 1%. Our approach is tested using the thermal conductivity of ethanol-water mixtures; in nearly pure ethanol, the increase in...
The high attention nanofluids have received in the first decade of the twenty-first century and all the research on these suspensions are due to the experimentally observed very high values of their thermal conductivity. The high conductivity values may
of the study. Hence to extend the application and statistical power of the trend analyses, system parameters such as nanoparticle material must be fixed. Thus, the scope of the present critical analysis was reduced to experimental thermal conductivity performance of alumina–water nanofluids. Thermal ...
3a, b. Even though the curved borosilicate surfaces induced light distortion, the highly bright metal surface could verify the integrity of the Zn nanowires (Supplementary Fig. 5). Furthermore, electrical conductivity was measured for multiple wire segments of 1.5 cm to validate the integrity of...
0.5 ml of 10 mM NaCl was added to obtain the ionic strength and dispersion conductivity needed for the measurement. A capillary green zeta potential cell for the Zetasizer Nano ZS (Malvern Instruments Ltd., UK) was used for all measurements. 3D-printing A Hyrel3D 30 M (Hyrel ...
In this article, we report an experimental correlation (Eq. 1-a, 1-b or 1-c) for the thermal conductivity of Al₂O₃nanofluids as a function of nanoparticle size (ranging from 11-㎚ to 150-㎚ nominal diameters) over a wide range of temperature (from 21℃ to 71℃). Following ...
We determined the thermal conductivity of silver nanoparticle ink during laser sintering by applying the Wiedemann–Franz law to two-dimensional heat conduction equations. Ink with 34 wt% silver (Ag) nanoparticles with an average size of approximately 50 nm was printed on Eagle-XG (Samsung–Corning...
Such a nanolayer, which has a higher thermal conductivity than that of the base fluid is considered to act as a thermal connector between the nanoparticle and the base fluid. The above mentioned mechanisims are widely discussed in the literatures and thus it is not necessary to further ele...