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Relevant bibliographies by topics / Non-Spherical shape

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Journal articles

Academic literature on the topic 'Non-Spherical shape'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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Journal articles on the topic "Non-Spherical shape"

1

Chand, R., R. Hadj Lajimi, S. Uddin, S. Meghwar, U. Farooq, and N. Rekik. "Numerical Simulations on Mixing Dynamics of Spherical and Non-Spherical Tablets in a Pan Coater." Engineering, Technology & Applied Science Research 9, no. 6 (2019): 5029–32. http://dx.doi.org/10.48084/etasr.3178.

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Discrete element simulations provide valuable insight into the mixing dynamics of granular materials in industry. In this paper, numerical work is conducted in order to find the influence of pan rotational velocity and particle shape on mixing behavior. Four types of particles of different shapes were chosen: spherical, non-spherical type 1 (disk shape), non-spherical type 2 (capsule shape), and non-spherical type 3 (triangular shape). The pan mixer was filled with ~ 30 % volume of the same shape with the particles and was rotated at 15 RPM, 30 RPM, 45 RPM, and 60 RPM. The particles were colored as bottom-particles, middle-particles, and top-particles in order to visualize mixing efficiency. The homogeneity of the mixtures was determined by using contact dynamics of particles. The results show that fast-rotating pan (30-60 RPM) provides good mixing for all shapes of particles. However, non-spherical particles do not show as good mixing as spherical particles.

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2

Santos, Elias Gomes, Luiz Carlos da Silva Carvalho, André Luiz Amarante Mesquita, Luiz Moreira Gomes, Kelvin Alves Pinheiro, and Alexandre Luiz Amarante Mesquita. "Discrete element modeling of non-spherical particles using a spherical shape." REM - International Engineering Journal 73, no. 3 (2020): 361–69. http://dx.doi.org/10.1590/0370-44672019730101.

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3

Watanabe, Chihiro, and Ryoichi Monzen. "Coarsening of Precipitated Particles with Non-spherical Shape." Materia Japan 52, no. 10 (2013): 475–83. http://dx.doi.org/10.2320/materia.52.475.

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4

Volgina, Liudmila, and Anastasiia Romanova. "Hydraulic size of non-spherical solid particles." E3S Web of Conferences 97 (2019): 05034. http://dx.doi.org/10.1051/e3sconf/20199705034.

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The paper studies impact of determining the diameter of solid particles on the calculation of the hydraulic particle size in the water flow. The relevance of the topic is also connected with the use of calculation of hydraulic size in hydraulic engineering in forecasting: downstream erosion, the formation of shoals, canals, bottom spillages, etc. Most of the empirical formulas for calculating the hydraulic particle size are applicable to spherical particles. However, the nature of the solid particles rarely has a spherical shape. The aim of this work is to investigate experimentally the dependence of the hydraulic size of the diameter of the solid particles. Different approaches to determining the diameter solid particles are analyzed, as for non-spherical particles finding the diameter is an independent and complex problem. For the experimental research solid particles of different shapes and sizes were used. The diameter is included in the empirical formulas for hydraulic size linearly, and to the power of 2 or 0.5. Therefore, the dependence of the experimental hydraulic size on the diameter was correlated with the corresponding functions. The shape of the particle significantly affects the value of the hydraulic size and depends on the diameter to the power of (0.5).

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5

Spârchez, Zeno. "The Separation of Spherical Shape Powder Particles from the Non-Spherical Ones." Advanced Materials Research 23 (October 2007): 87–90. http://dx.doi.org/10.4028/www.scientific.net/amr.23.87.

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The conditions needed for an efficient separation together with the most important factors influencing the accuracy of the separation are emphasized. Some relationships that allow the evaluation of the covering degree of the separation surface and the volume of the charge with single dimension particles corresponding to a unit separation surface are presented. The efficiency of spherical shape particles separation and the productivity of the separation process have been analysed. Some technical and practical considerations on the separation process are given.

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6

Andersen, Anders, and Julia Dölger. "Planktonic encounter rates with non-spherical encounter zones." Journal of The Royal Society Interface 16, no. 156 (2019): 20190398. http://dx.doi.org/10.1098/rsif.2019.0398.

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We present general formulae for planktonic predator–prey encounter rates with encounter zones of convex shape and randomly moving point-like prey with ballistic motion. When the predator is not moving, we show that the encounter rate is independent of the shape of the encounter zone around it and proportional to the product of the surface area of the encounter zone and the prey speed. By contrast, the shape of the encounter zone plays a role when both the predator and the prey are moving. Slow predator motion results in only a weak increase of the encounter rate relative to the non-motile predator situation, but it may lead to a significant shift in where prey impact the surface of the encounter zone. By analysing disc-like and rod-like encounter zones with lengthwise and sideways motion, respectively, we show that fast predator motion may significantly influence the encounter rate, depending on the shape and the direction of motion of the encounter zone.

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7

Ranjan, Shashi, Kerwin Kwek Zeming, Roland Jureen, Dale Fisher, and Yong Zhang. "DLD pillar shape design for efficient separation of spherical and non-spherical bioparticles." Lab Chip 14, no. 21 (2014): 4250–62. http://dx.doi.org/10.1039/c4lc00578c.

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8

Yang, Zhongqiang, Wilhelm T. S. Huck, Stuart M. Clarke, Ali R. Tajbakhsh, and Eugene M. Terentjev. "Shape-memory nanoparticles from inherently non-spherical polymer colloids." Nature Materials 4, no. 6 (2005): 486–90. http://dx.doi.org/10.1038/nmat1389.

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9

Spârchez, Zeno. "Fabrication of Metal Powders Having Spherical Shape Particles (an Overview)." Advanced Materials Research 23 (October 2007): 95–98. http://dx.doi.org/10.4028/www.scientific.net/amr.23.95.

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On the basis of a graphical classification devised by the author, the paper presents a brief analysis of the principal methods and procedures used for elaborating powders having spherical particles. The than discussion is focused on emphasizing and classifying the influence factors related to the material, processing method and equipment, which enables the obtaining of spherical particles. In the case of those methods which lead to both spherical and non-spherical particles, additional operations are needed the separation of the non-spherical particles, possibly followed by their conversion to spherical particles in a thermal field.

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10

Ji, W. M., F. Y. Jiang, and C. X. Chu. "CALCULATION AND ANALYSIS ON SCATTERING CHARACTERISTICS OF NON-SPHERICAL PARTICLES OF HAZE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W9 (October 25, 2019): 83–88. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w9-83-2019.

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Abstract. The light scattering characteristics of sulfate, one of the main pollutant particles in haze, are calculated by T-Matrix method at a target wavelength of 550 nm. The variation between shape factors (such as effective radius and aspect ratio) and scattering phase functions with different types and shapes are analysed in small scale range. The influence of shape factors on scattering cross section and depolarization ratio of particles are also discussed. Results show that the shape of particles has great effects on the spatial distribution of scattering energy, and the scattering properties of particles are sensitive to aspect ratio. The depolarization of spherical particles is close to zero, while the difference between ellipsoidal and cylindrical particles reaches several orders of magnitude. When the equivalent radius is larger than 1.0 μm, the mean depolarization ratio of the non-spherical particles is greater than 0.2. The mean depolarization ratio and scattering cross section of non-spherical particle change continuously with a certain aspect ratio and particle size range, and the shape of some particles can be therefore distinguished under certain conditions.

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