نتایج جستجو برای: size distribution psd

تعداد نتایج: 1109597  

In this paper, the effects of two different Particle Size Distributions (PSD) on packingbehavior of ideal rigid spherical nanoparticles using a novel packing model based on parallelalgorithms have been reported. A mersenne twister algorithm was used to generate pseudorandomnumbers for the particles initial coordinates. Also, for this purpose a nanosized tetragonal confinedcontainer with a squar...

2018
Hua Dong Hongzhi Zhang Yibing Zuo Peng Gao Guang Ye

Mercury intrusion porosimetry (MIP) measurements are widely used to determine pore throat size distribution (PSD) curves of porous materials. The pore throat size of porous materials has been used to estimate their compressive strength and air permeability. However, the effect of sample size on the determined PSD curves is often overlooked. In pursuit of a better understanding of the effect of ...

Journal: :Fractal and fractional 2021

In this study, a series of nuclear magnetic resonance (NMR) tests was conducted on calcareous sand, quartz and glass bead with wide range grain sizes, to understand the effect size micro-pore structure fractal characteristics carbonate-based sand silicate-based sand. The pore distribution (PSD) tested materials were obtained from NMR T2 spectra, theory introduced describe properties PSD. Result...

2006
B. Wan Y. Ji H. Y. Sohn H. D. Jang T. A. Ring

The process of synthesizing silica nanopowder by the gas phase thermal oxidation of tetraethylorthosilicate (TEOS) in a diffusion flame reactor was simulated using a commercial computational fluid dynamic (CFD) code. The fuel combustion process and silica particle formation and growth in the flame are modeled. The temperature, velocity and particle size distribution (PSD) fields inside the reac...

Journal: :Journal of animal science 2002
J L Noguera L Varona D Babot J Estany

A total of 66,620 records from the first six parities for number of piglets born alive (NBA) from 20,120 Landrace sows and 24,426 records for weight (WT) and backfat thickness (BT) at 175 d of age were analyzed to estimate genetic parameters. The pedigree consisted of 47,186 individuals, including 392 sires and 5,394 dams. Estimates were based on marginal posterior distribution of the genetic p...

2017
M Mahdi Roozbahani Rodrigo Borela J David Frost

Pore scale modeling plays a key role in fluid flow through porous media and associated macroscale constitutive relationships. The polyhedral shape and effective local pore size within granular material microstructure are computed in this study by means of the Euclidean Distance Transform (EDT), a local maxima search (non-maximum suppression), and a segmentation process. Various synthetic packed...

ژورنال: علوم آب و خاک 2017
فرومدی, مجید, واعظی, علی رضا,

Rill erosion is the first step in soil erosion process in the hillslopes, particularly in arid and semiarid regions. This study was conducted to investigate the role of rainfall intensity and raindrop impact on the physical properties of soils and particle detachment capacity (Dc) in a marl soil. Marl soil samples were filled into the flumes with 4 m long and 0.9 m wide and exposed to simulated...

2007
A. Maulud J. Romagnoli

A mid-course correction (MCC) policy has been shown as a practical approach to compensate the effects of the new disturbances on the final particle size distribution (PSD) in the emulsion polymerization process. However, the development of control model remains immature in the practical sense. In this paper, a control strategy to control the bi-modal particle size distribution in an emulsion co...

Journal: :Spanish Journal of Agricultural Research 2021

Particle-size distribution (PSD) is a key parameter affecting soil dynamic attributes and cutting forces of tillage tools in the discrete element model accordance with our preliminary simulations. To accurately determine PSD, significance mechanism for effect PSD under different nominal radii were investigated using method (DEM) validated laboratory soil-bin results. Soil disturbance characteri...

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