Experimental investigation and artificial intelligent estimation of thermal conductivity of nanofluids with different nanoparticles shapes

Cui, Wei; Cao, Zehan; Lü, Lin; Ma, Ting; Wang, Qiuwang

doi:10.1016/j.powtec.2021.117078

Cited by 35 publications

(8 citation statements)

References 41 publications

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“…This type of nanoparticle can perfectly adapt to the "rolling effect" and act as a "bearing" structure for the -tool-workpiece interface, reducing interface friction and cutting force to improve surface integrity as well as reducing the tool lifespan [98]. In contrast, spherical nanoparticles often exhibit relatively low thermal conductivity, and improving the thermal conductivity of spherical nanoparticles is the key goal of breakthroughs in the current research field [99].…”

Section: Shape Of Nanoparticlesmentioning

confidence: 99%

Nanofluids Minimal Quantity Lubrication Machining: From Mechanisms to Application

Chu,

Li,

Zhou

et al. 2023

Lubricants

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Minimizing the negative effects of the manufacturing process on the environment, employees, and costs while maintaining machining accuracy has long been a pursuit of the manufacturing industry. Currently, the nanofluid minimum quantity lubrication (NMQL) used in cutting and grinding has been studied as a useful technique for enhancing machinability and empowering sustainability. Previous reviews have concluded the beneficial effects of NMQL on the machining process and the factors affecting them, including nanofluid volume fraction and nanoparticle species. Nevertheless, the summary of the machining mechanism and performance evaluation of NMQL in processing different materials is deficient, which limits preparation of process specifications and popularity in factories. To fill this gap, this paper concentrates on the comprehensive assessment of processability based on tribological, thermal, and machined surface quality aspects for nanofluids. The present work attempts to reveal the mechanism of nanofluids in processing different materials from the viewpoint of nanofluids’ physicochemical properties and atomization performance. Firstly, the present study contrasts the distinctions in structure and functional mechanisms between different types of base fluids and nanoparticle molecules, providing a comprehensive and quantitative comparative assessment for the preparation of nanofluids. Secondly, this paper reviews the factors and theoretical models that affect the stability and various thermophysical properties of nanofluids, revealing that nanoparticles endow nanofluids with unique lubrication and heat transfer mechanisms. Finally, the mapping relationship between the parameters of nanofluids and material cutting performance has been analyzed, providing theoretical guidance and technical support for the industrial application and scientific research of nanofluids.

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Section: Shape Of Nanoparticlesmentioning

confidence: 99%

Nanofluids Minimal Quantity Lubrication Machining: From Mechanisms to Application

Chu,

Li,

Zhou

et al. 2023

Lubricants

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show abstract

“…The results showed that the relative thermal conductivity (RTC) of TiO 2 /water nanofluids with clubbed and sheet-shaped nanoparticles is higher than other shapes, and TiO 2 nanofluids with sheet nanoparticles showed the highest RTC for a temperature of 60 °C and a nanoparticle concentration of 4%. A transmission electron microscope (TEM, JEM-1200EX, Jeol Ltd., Tokyo, Japan) and an ultrasonic bath were used to prepare the nanofluids [ 58 ].…”

Section: Impact Of Morphology and Concentration Of Nanoparticles On N...mentioning

confidence: 99%

“… TEM images and morphology descriptions for TiO 2 nanoparticles with different shapes: ( a ) spherical, ( b ) ellipsoidal, ( c ) clubbed, and ( d ) sheet [ 58 ]. …”

Section: Figurementioning

confidence: 99%

Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

et al. 2022

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Nanofluids can be employed as one of the two fluids needed to improve heat exchanger performance due to their improved thermal and rheological properties. In this review, the impact of nanoparticles on nanofluid properties is discussed by analyzing factors such as the concentration, size, and shape of nanoparticles. Nanofluid thermophysical properties and flow rate directly influence the heat transfer coefficient and pressure drop. High thermal conductivity nanoparticles improve the heat transfer coefficient; in particular, metallic oxide (such as MgO, TiO2, and ZnO) nanoparticles show greater enhancement of this property by up to 30% compared to the base fluid. Nanoparticle size and shape are other factors to consider as well, e.g., a significant difference in thermal conductivity enhancement from 6.41% to 9.73% could be achieved by decreasing the Al2O3 nanoparticle size from 90 to 10 nm, affecting nanofluid viscosity and density. In addition, equations to determine the heat transfer rate and the pressure drop in a double-pipe heat exchanger are presented. It was established that the main factor that directly influences the heat transfer coefficient is the nanofluid thermal conductivity, and nanofluid viscosity affects the pressure drop.

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“…It was confirmed that the nuclear magnetic resonance is eligible for tracking the fluid movement before and after CO 2 exposure in shales, and the most important impact factor is the adsorption outweighing the molecular diffusion, which may determine the CO 2 injection rate. With the development of artificial intelligence techniques, bioenergy systems can be optimized automatically, revealing more effective progress based on existing experimental and numerical data [50].…”

Section: Hybrid Bio-energy Systemsmentioning

confidence: 99%

Recent Advances in Technologies, Methods, and Economic Analysis for Sustainable Development of Energy, Water, and Environment Systems

et al. 2022

Self Cite

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Sustainability has become a broad societal goal, aiming to ensure that human beings coexist safely and harmoniously with nature over a longer time. The influence of the COVID-19 pandemic on the global economy is coming to an end. The development and merits of sustainable energy supply, advanced technology, and economic features have received significant attention over the last few decades. However, significant gaps still exist with respect to how to design, construct, and implement hybrid and optimal energy systems with the lowest investment and cost. Since 2002, the Sustainable Development of Energy, Water, and Environment Systems (SDEWES) conferences have become a significant meeting venue for researchers to introduce, discuss, share, and disseminate novel concepts and ideas. This paper presents an overview of published articles in the Special Issues (SIs) dedicated by the series SDEWES conferences, especially those published in Energies recommended by the 16th SDEWES Conference, which was held on 10–15 October 2021 in Dubrovnik, Croatia. This SI in Energies focused on four main topics, including the application of renewable bioenergy, component enhancement in renewable systems, sustainable development for buildings and economic analysis and evaluation for sustainability. The collected papers provide insight into the topics related to recent advances in improving sustainable efficiency, including studies on waste-to-wealth techniques, utilization of hybrid bioenergy systems, heat exchangers and other components for performance enhancement, energy supply and demand analysis, low-temperature DHC systems, techno-economic assessment, and environmental evaluation.

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Experimental investigation and artificial intelligent estimation of thermal conductivity of nanofluids with different nanoparticles shapes

Cited by 35 publications

References 41 publications

Nanofluids Minimal Quantity Lubrication Machining: From Mechanisms to Application

Nanofluids Minimal Quantity Lubrication Machining: From Mechanisms to Application

Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

Recent Advances in Technologies, Methods, and Economic Analysis for Sustainable Development of Energy, Water, and Environment Systems

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