Topic
Nanofluid
About: Nanofluid is a research topic. Over the lifetime, 23986 publications have been published within this topic receiving 677384 citations.
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TL;DR: In this paper, the enhancement of the thermal conductivity of ethylene glycol in the presence of copper oxide (CuO) was investigated by using a modified transient hot wire method.
Abstract: The enhancement of the thermal conductivity of ethylene glycol in the presence of copper oxide (CuO) is investigated. CuO nanofluids are prepared in a two-step method. No surfactant is employed as a dispersant. The volume fraction of CuO nanoparticles suspended in ethylene glycol liquid is below 5 vol.-%. The crystalline phases of the CuO powders are measured with x-ray diffraction patterns (XRD). CuO nanoparticles are examined using scanning electron microscopy (SEM) to determine their microstructure. The thermal conductivities of the CuO suspensions are measured by a modified transient hot wire method. The viscosity was measured with a viscosity instrument. The results show that CuO nanofluids with low concentrations of nanoparticles have considerably higher thermal conductivities than the identical ethylene glycol base liquids without solid nanoparticles. The thermal conductivity ratio improvement for CuO nanofluids is approximately linear with the volume fraction of nanoparticles. For CuO nanoparticles at a volume fraction of 0.05 (5 vol-.%) thermal conductivity was enhanced by up to 22.4 %. CuO nanofluids thus have good potential for effective heat transfer applications.
263 citations
TL;DR: In this paper, the effect of nanofluid minimum quantity lubrication (MQL) on the temperatures in surface grinding is presented and discussed, and a mathematical model for convective heat transfer coefficient is then developed based on the boundary layer theories.
262 citations
TL;DR: In this paper, a co-precipitation method at different pH values was used to synthesize magnetite Fe 3 O 4 nanoparticles and the results showed that the shape of the particles is cubic and they are superparamagnetic at room temperature.
262 citations
TL;DR: In this paper, the viscosity of the stable nanofluids, prepared by dispersing 40-nm diameter spherical CuO nanoparticles in gear oil, was investigated.
262 citations
TL;DR: In this paper, the authors present empirical and numerical analyses of thermal performance development in flat plate solar collectors (FPSCs) and provide a complete overview of the up-to-date developments, methods, critical economic factors, the significance of solar water heating, and the challenges faced by the implementations of such solar energy heating systems.
262 citations