The stability of dispersed nanoparticles in the base fluid has always been one of the most important challenges in using nanofluids as a coolant in heat transfer applications in different industries such as modern ele...
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The stability of dispersed nanoparticles in the base fluid has always been one of the most important challenges in using nanofluids as a coolant in heat transfer applications in different industries such as modern electronic equipment, heat exchangers, solar technologies, etc. In the present study, the dynamic light scattering (DLS) method is used to obtain the particle size distribution of Al2O3-ZnO dispersed in DI water. After adjusting the optical arrangement and designing the DLS setup, the correlation curves are plotted by analyzing the detected signals of the experiments. Then, a decay rate is derived by fitting an exponential function to the correlation curve to get the particle size distribution by using the Stoke-Einstein equation. In order to investigate the stability of Al2O3-ZnO water-based nanofluid, the particle size distribution profiles are studied several times. In addition, the stability of Al2O3-ZnO-CNT hybrid nanofluid is followed by absorbance measurements using a UV-Vis spectrophotometer. Moreover, the thermal conductivity coefficient and electrical conductivity of the Al2O3-ZnO hybrid nanofluid with and without CNT particles are determined by utilizing KD2 Pro and PCT-407 devices, respectively. The results showed that the peak in the particle size distribution curve for Al2O3-ZnO hybrid nanofluid shifted from 476 nm to 128 nm after 5 days. Furthermore, the inclusion of carbon nanotubes increased the stability of zinc oxide particles in the nanofluid. In addition, by adding carbon nanotubes in a ratio of 1:1:0.5 to Al2O3ZnO nanofluid and forming 0.05 wt.% hybrid nanofluid, the thermal conductivity coefficient was enhanced by 30% in comparison with deionized water, while a 0.05 wt.% hybrid nanofluid without CNT particles improved the thermal conductivity by 19%. Although the electrical conductivity increased by adding nanoparticles to the base fluid, it didn’t change significantly for nanofluids containing CNTs compared to nanofluids without CNT
An open problem in industrial automation is to reliably perform tasks requiring in-contact movements with complex workpieces, as current solutions lack the ability to seamlessly adapt to the workpiece geometry. In thi...
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Parabolic trough solar collectors have been introduced as a suitable alternative to fossil fuels. This paper investigates the performance of the EuroTrogh-150 collector for six absorber tubes where the absorber tubes ...
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Silicon-on-Insulator (SOI) technology has been the center of attraction with the advancement in RF technology and the advent of Internet-of-Things due to its low-power operation with reduced parasitic and short-channe...
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In-space flight demonstration of a rotating detonation engine system using liquid nitrous oxygen and liquid ethanol as the propellant (DES-2) is planned in FY2024 by a collaborative research group of Nagoya University...
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The exceptional corrosion resistance and mechanical properties of high-entropy metallic glasses(HE-MGs)are highly desirable for diverse critical ***,a long-standing problem of these alloys is that their alloy design a...
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The exceptional corrosion resistance and mechanical properties of high-entropy metallic glasses(HE-MGs)are highly desirable for diverse critical ***,a long-standing problem of these alloys is that their alloy design approaches are based on limited equiatomic or near-equiatomic *** this study,a novel senary alloy(non-equiatomic Fe3 Cr2 Al2 CuNi4 Si5)with amorphous structure was *** alloy exhibited exceptional corrosion resistance and Vickers hardness as high as^1150 Hv at room *** processing route involved amorphous powder molding via a mechanical alloying and ultrahigh pressure consolidation technique,resulting in an optimal microstructure of amorphous structure with nanoparticles uniformly distributed in the matrix *** approach can effectively inhibit the crystallization of amorphous structure,thus providing a general pathway for manufacturing next-generation non-equiatomic HE-MGs with both exceptional corrosion resistance and strength.
The failure of interfaces between polymers and inorganic substrates often leads to deteriorated performance, as is the case for polymer matrix composites. Interfacial mechanophores (iMPs) have the potential to fluores...
The failure of interfaces between polymers and inorganic substrates often leads to deteriorated performance, as is the case for polymer matrix composites. Interfacial mechanophores (iMPs) have the potential to fluorescently measure interfacial failures. Spirolactam-based mechanophores are of interest due to their readily available synthetic precursors and compatibility with epoxy matrices. In this work, spirolactam is covalently bound at the interface of silica surfaces and epoxy, chosen due to the industrial relevance of glass fiber composites. The iMPs are mechanically activated through uniaxial tension applied to the composite while the resulting fluorescent response is observed in situ with a confocal microscope. Due to their real time sensing capabilities, iMPs are a promising technique to measure interfacial failures in composite materials more easily than with traditional optical microscopy techniques.
A physics-informed neural network (PINN) is used to evaluate the fast ion distribution in the hot spot of an inertial confinement fusion target. The use of tailored input and output layers to the neural network is sho...
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Zinc metal has aroused increasing interest as anode material of Zn-based batteries for their energy storage ***,the uneven Zn stripping/plating processes induce severe dendrite growth,leading to low Coulombic efficien...
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Zinc metal has aroused increasing interest as anode material of Zn-based batteries for their energy storage ***,the uneven Zn stripping/plating processes induce severe dendrite growth,leading to low Coulombic efficiency and safety ***,a surface-tuned two-dimensional(2D)MXene Ti_(3)C_(2)Tx scaffold as a robust skeleton is developed to facilitate the uniform Zn stripping/*** Ti_(3)C_(2)Tx with high electrical conductivity and unique structure provides fast ionic-transport paths,promising even Zn2+stripping/plating *** suppressed Zn dendrite growth and uniform nucleation,the proposed 2D Ti_(3)C_(2)Tx scaffold for Zn metal anode delivers a low voltage hysteresis of 63 m V and long lifespan over 280 *** surface-tuned engineering strategy demonstrates the potential application of Zn anode with MXene skeleton for next-generation Zn-based batteries.
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