Milling force and surface morphology of 45 steel under different Al2O3 nanofluid concentrations

Duan, Zhenjing; Yin, Qingan; Li, Changhe; Dong, Lan; Bai, Xueshan; Zhang, Yanbin; Yang, Min; Jia, Dongzhou; Li, Runze; Liu, Zhanqiang

doi:10.1007/s00170-020-04969-9

Cited by 94 publications

(16 citation statements)

References 57 publications

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“…The properties of water-Al 2 O 3 nanofluid i.e., density [10,65], heat capacity [66], effective dynamic viscosity [67], and effective thermal conductivity [67] are given as:…”

Section: Nanofluid Thermo-physical Propertiesmentioning

confidence: 99%

“…Collectors are one of the solar energy technologies that have been widely employed to convert solar energy into useful thermal energy [5][6][7]. In the collector, the solar radiation is reelected to the absorber tube and provides an almost uniform heat flux around the tube's wall [8][9][10]. There are several techniques in the literature working on heat transfer enhancement into the heat transfer fluid (HTF) inside the tube, including the use of inserts and modifying the characteristics of the HTF [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Multiple Semi-Twisted Tape Inserts in a Heat Exchanger Pipe Using Al2O3 Nanofluid

Zhu

Mashayekhi

et al. 2021

Nanomaterials

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The hydrothermal performance of multiple semi-twisted tape inserts inside a heat exchanger pipe is numerically examined in three-dimensions. This study aims to find the optimum case for having the highest heat transfer enhancement with the lowest friction factor using nanofluid (Al2O3/water). A performance evaluation criterion (PEC) is defined to characterize the performance based on both friction factor and heat transfer. It was found that increasing the number of semi-twisted tapes increases the number of swirl flow streams and leads to an enhancement in the local Nusselt number as well as the friction factor. The average Nusselt number increases from 15.13 to 28.42 and the average friction factor enhances from 0.022 to 0.052 by increasing the number of the semi-twisted tapes from 0 to 4 for the Reynolds number of 1000 for the base fluid. By using four semi-twisted tapes, the average Nusselt number increases from 12.5 to 28.5, while the friction factor reduces from 0.155 to 0.052 when the Reynolds number increases from 250 to 1000 for the base fluid. For the Reynolds number of 1000, the increase in nanofluid concentration from 0 to 3% improves the average Nusselt number and friction factor by 6.41% and 2.29%, respectively. The highest PEC is equal to 1.66 and belongs to the Reynolds number of 750 using four semi-twisted tape inserts with 3% nanoparticles. This work offers instructions to model an advanced design of twisted tape integrated with tubes using multiple semi-twisted tapes, which helps to provide a higher amount of energy demand for solar applications.

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“…The properties of water-Al 2 O 3 nanofluid i.e., density [10,65], heat capacity [66], effective dynamic viscosity [67], and effective thermal conductivity [67] are given as:…”

Section: Nanofluid Thermo-physical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Multiple Semi-Twisted Tape Inserts in a Heat Exchanger Pipe Using Al2O3 Nanofluid

Zhu

Mashayekhi

et al. 2021

Nanomaterials

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“…Understanding some basic mechanical properties of nanoparticles, such as the hardness and the elastic modulus, will aid a lot in the proper design of particles in specific applications, as well as evaluating their roles and action mechanisms [144][145][146]. It has been pointed out that [147][148][149] many microstructural features like grain size and shape, their distribution, pores and their distribution, other flaws/defects and their distribution, surface condition, impurity level, second phases/dopants, stress, duration of its application and temperature affect the mechanical properties of nanocrystalline (n-) materials. For crystalline metal nanoparticles, dislocations inside the particles have been demonstrated as one of the factors contributing to the change in the mechanical behaviour of nanoparticles, which is in contrast to the traditional view that no dislocation is present in crystalline nanoparticles.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…For crystalline metal nanoparticles, dislocations inside the particles have been demonstrated as one of the factors contributing to the change in the mechanical behaviour of nanoparticles, which is in contrast to the traditional view that no dislocation is present in crystalline nanoparticles. Apart from dislocations or defects, the changes of the lattice strain and the bond energies of nanoparticles to the compressive stress are another cause for the strengthening and weakening of the mechanical properties of nanoparticles [147][148][149]. Very few studies have been carried out on mechanical properties of nanostructured glasses.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Recent innovations in properties of nanostructured glasses and composites

Deepika¹,

Dixit

Singh

et al. 2021

Journal of Experimental Nanoscience

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The thrust to invent new materials and technology has been ever increasing due to technological challenges in progressive world. Among new materials, nanomaterials possess superior optical, electrical, magnetic, mechanical, and thermal properties, which have made them suitable for a multitude of applications. The present review paper deals with recent advances in properties of nanostructured glasses and composites in terms optical, electrical, mechanical and thermal properties. A brief discussion has been done on fabrication method of nanostructured glasses. The review of optical properties shows that nanostructured glasses show both direct and indirect band gap and this tuning of band gap depends on extent of nano structuring of samples. The electrical properties also show enhancement in electrical conductivity on nano-structuring of glasses compared to their bulk counterparts. The changes in mechanical and thermal properties of nanostructured glasses and composites are attributed to many microstructural features like grain size and shape, their distribution, pores and their distribution, other flaws/defects and their distribution, surface condition, impurity level, second phases/dopants, stress, duration of its application and temperature effect on the samples. Literature reports that nano structuring leads to enhanced phonon boundary scattering which reduces the thermal conductivity.

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“…[ 26 , 27 , 28 , 29 , 30 ]. Controlling the size of nanomaterials contributes to the emergence of new microscopic properties [ 31 , 32 , 33 ]. For example, a nanofluid is a fluid containing nanometer-sized particles, called nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Application of Nanotechnology for Sensitive Detection of Low-Abundance Single-Nucleotide Variations in Genomic DNA: A Review

et al. 2021

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Single-nucleotide polymorphisms (SNPs) are the simplest and most common type of DNA variations in the human genome. This class of attractive genetic markers, along with point mutations, have been associated with the risk of developing a wide range of diseases, including cancer, cardiovascular diseases, autoimmune diseases, and neurodegenerative diseases. Several existing methods to detect SNPs and mutations in body fluids have faced limitations. Therefore, there is a need to focus on developing noninvasive future polymerase chain reaction (PCR)–free tools to detect low-abundant SNPs in such specimens. The detection of small concentrations of SNPs in the presence of a large background of wild-type genes is the biggest hurdle. Hence, the screening and detection of SNPs need efficient and straightforward strategies. Suitable amplification methods are being explored to avoid high-throughput settings and laborious efforts. Therefore, currently, DNA sensing methods are being explored for the ultrasensitive detection of SNPs based on the concept of nanotechnology. Owing to their small size and improved surface area, nanomaterials hold the extensive capacity to be used as biosensors in the genotyping and highly sensitive recognition of single-base mismatch in the presence of incomparable wild-type DNA fragments. Different nanomaterials have been combined with imaging and sensing techniques and amplification methods to facilitate the less time-consuming and easy detection of SNPs in different diseases. This review aims to highlight some of the most recent findings on the aspects of nanotechnology-based SNP sensing methods used for the specific and ultrasensitive detection of low-concentration SNPs and rare mutations.

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Milling force and surface morphology of 45 steel under different Al2O3 nanofluid concentrations

Cited by 94 publications

References 57 publications

Evaluation of Multiple Semi-Twisted Tape Inserts in a Heat Exchanger Pipe Using Al2O3 Nanofluid

Evaluation of Multiple Semi-Twisted Tape Inserts in a Heat Exchanger Pipe Using Al2O3 Nanofluid

Recent innovations in properties of nanostructured glasses and composites

Application of Nanotechnology for Sensitive Detection of Low-Abundance Single-Nucleotide Variations in Genomic DNA: A Review

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