Porosity and flow rate of moving aerated bed of fine granular material

1987 ◽  
Vol 23 (1) ◽  
pp. 20-24
Author(s):  
I. I. Mukhin
Keyword(s):  
Granular Material ◽  
Flow Rate ◽  
Fine Granular Material

On the Mass Flow Rate of Granular Material in Silos with Lateral Exit Holes

2012 ◽  
pp. 261-266
Author(s):  
Abraham Medina ◽  
G. Juliana Gutiérrez-Paredes ◽  
Satyan Chowdary ◽  
Anoop Kumar ◽  
K. Kesava Rao
Keyword(s):  
Granular Material ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate

scholarly journals Tubular lysosomes in ruffle-ended ameloblasts associated with enamel maturation in rat incisor.

1989 ◽  
Vol 37 (6) ◽  
pp. 801-811 ◽  
Author(s):  
A H Salama ◽  
A E Zaki ◽  
D R Eisenmann
Keyword(s):  
Granular Material ◽  
Multivesicular Bodies ◽  
Rat Incisor ◽  
Early Maturation ◽  
Membrane Bound ◽  
Lysosomal System ◽  
Endosomal System ◽  
Fine Granular Material

Trimetaphosphatase (TMPase) and cytidine-5'-monophosphatase (CMPase) were localized to investigate the lysosomal system, particularly tubular lysosomes, in ruffle-ended ameloblasts associated with maturation of enamel in rat incisor. Demineralized specimens were incubated for TMPase and for CMPase in a modified medium where cerium was used as the capture ion. Ruffle-ended ameloblasts showed distal invaginations and membrane-bound bodies filled with fine granular material, some of which displayed CMPase reaction product. Elongated tubular configurations 80-140 nm wide were distributed throughout the cytoplasm and were reactive with both TMPase and CMPase, thus characterizing these structures as lysosomes. They often contained fine granular material morphologically similar to that present in multivesicular bodies. During late enamel maturation, fewer tubular lysosomes were observed when compared to early maturation. These cytochemical results demonstrate the presence of tubular lysosomes in ruffle-ended ameloblasts, and it is suggested that they are elements of the endosomal system in these cells. These findings are also consistent with a resorptive function for ruffle-ended ameloblasts during enamel maturation.

scholarly journals The effect of cohesion on the discharge of a granular material through the orifice of a silo

2021 ◽  
Vol 249 ◽  
pp. 08014
Author(s):  
Adrien Gans ◽  
Pascale Aussillous ◽  
Blanche Dalloz ◽  
Maxime Nicolas
Keyword(s):  
Granular Material ◽  
Numerical Simulations ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Experimental Results ◽  
Numerical Investigations ◽  
Silo Discharge

We present the results of both experimental and numerical investigations of the silo discharge for a cohesive granular material. In our study, thanks to a cohesion-controlled granular material (CCGM) we propose to investigate the effect of the cohesive length lc, on the discharge of a silo for two different configurations, one axisymmetrical, and one quasi-2D rectangular silo. In both configurations, an adjustable bottom is used to control the size of the orifice. As observed for cohesionless granular material by previous studies, the mass flow rate and the density through an orifice are mostly controlled by the diameter of the orifice D. The experimental results of the quasi-2D silo are compared with continuum numerical simulations.

Screening of Fine Granular Material

2003 ◽  
Vol 23 (4) ◽  
pp. 183-211 ◽  
Author(s):  
P. Wodzinski
Keyword(s):  
Granular Material ◽  
Fine Granular Material

Air Pressure in the Bulk of Granular Solid Discharged From a Bin

1969 ◽  
Vol 91 (2) ◽  
pp. 382-384 ◽  
Author(s):  
A. Wlodarski ◽  
A. Pfeffer
Keyword(s):  
Granular Material ◽  
Flow Rate ◽  
Pressure Difference ◽  
Solid Particles ◽  
Air Pressure ◽  
Rate Equations ◽  
Small Laboratory ◽  
Laboratory Apparatus ◽  
Surrounding Atmosphere ◽  
Granular Solid

Air pressure different from that in the surrounding atmosphere develops in the bulk of granular material flowing out of an open bin through the bottom orifice. When measured on the axis of a small laboratory apparatus the differences have been found to oscillate about a mean changing along the bin and reaching its maximum/negative/well above the orifice. Pressure difference at a given point inside the bed depends upon the orifice size, and upon the size of solid particles. Equalization of the air pressure just above the orifice with that of the air outside the bin influences flow rate of the material. It is suggested that the overlooking of these effects is to some extent responsible for the great variety of flow rate equations so far proposed.

scholarly journals Gravity Flow of Granular Materials in Conical Hoppers

1979 ◽  
Vol 46 (3) ◽  
pp. 529-535 ◽  
Author(s):  
T. V. Nguyen ◽  
C. Brennen ◽  
R. H. Sabersky
Keyword(s):  
Experimental Data ◽  
Approximate Solution ◽  
Granular Material ◽  
Granular Materials ◽  
Flow Rate ◽  
Yield Condition ◽  
Wall Stress ◽  
Perfectly Plastic ◽  
Analytical Expressions ◽  
Conical Hopper

An approximate solution to the flow of a cohesionless granular material in a conical hopper is presented. The material is modeled as a perfectly plastic continuum which satisfies the Mohr-Coulomb yield condition. Analytical expressions of the mass flow rate and the wall stress are derived and compared to some experimental data and other analyses.

scholarly journals Granular flow through vertical slots: analysis of a general formula

2021 ◽  
Vol 249 ◽  
pp. 03027
Author(s):  
A. Medina ◽  
D.A. Serrano ◽  
A. López-Villa ◽  
M. Pliego
Keyword(s):  
Granular Material ◽  
Mass Flow Rate ◽  
General Formula ◽  
Mass Flow ◽  
Flow Rate ◽  
Granular Flow ◽  
Gravity Driven ◽  
Flow Through ◽  
Well Data

Currently, very little is known about reliable phenomelogical correlations to estimate the gravity-driven mass flow rate, of dry non-cohesive granular material, outflowing from thin thickness slots in vertical sidewalls of rectangular silos. Here, we validate a simple and general formula that fits pretty well data published elsewhere, including the cases of vertically and horizontally elongated slots.

Grinding of fine granular material with fluidization

1972 ◽  
Vol 8 (3) ◽  
pp. 210-213 ◽  
Author(s):  
T. A. Kutyavina ◽  
A. P. Baskakov
Keyword(s):  
Granular Material ◽  
Fine Granular Material
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