On the Pinhead Shadow Inversion Phenomenon

1944 ◽  
Vol 12 (3) ◽  
pp. 164-165 ◽  
Author(s):  
F. R. Hirsh ◽  
E. M. Thorndike
Keyword(s):  
Inversion Phenomenon

scholarly journals Systematic Experimental Investigation of Segregation Direction and Layer Inversion in Binary Liquid-Fluidized Bed

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 177
Author(s):  
Alberto Di Renzo ◽  
Giacomo Rito ◽  
Francesco P. Di Maio
Keyword(s):  
Experimental Investigation ◽  
Operating Conditions ◽  
Industrial Processes ◽  
Process Unit ◽  
Separation Processes ◽  
Solids Concentration ◽  
Expansion Range ◽  
Surface Expansion ◽  
Density Ratios ◽  
Inversion Phenomenon

Multi-component liquid-fluidized beds are encountered in a variety of industrial processes. Often, segregation severely affects the performance of the process unit. Unfortunately, size-driven and density-driven separation processes may occur with a complex interplay, showing prevailing mechanisms that change with the operating conditions. For example, when the solids exhibit contrasting differences in size and density, even the direction of segregation can turn out hard to predict, giving rise for some systems to the so-called “layer inversion phenomenon”. A systematic experimental investigation is presented on 14 different binary beds composed of glass beads and ABS spheres with different size and density ratios and different bed composition. The analysis allows assessing the reliability of a model for predicting the segregation direction of fluidized binary beds (the Particle Segregation Model, PSM). By measurements of the solids’ concentration at the surface, expansion/segregation properties and the inversion voidage are compared with the PSM predictions, offering a direct means of model validation. Both the segregation direction throughout the expansion range and the value of the inversion voidage are compared. Extensive qualitative agreement is obtained for 12 out of 14 fluidized mixtures. Quantitatively, the average discrepancy between predicted and measured inversion voidage is below 5%, with a maximum of 17%.

Unusual Inversion Phenomenon of β-Cyclodextrin Dimers in Water

2011 ◽  
Vol 17 (14) ◽  
pp. 3949-3955 ◽  
Author(s):  
Stéphane Menuel ◽  
Nathalie Azaroual ◽  
David Landy ◽  
Natacha Six ◽  
Frédéric Hapiot ◽  
...  
Keyword(s):  
Inversion Phenomenon

Layer inversion phenomenon in binary-solid liquid-fluidized beds: Prediction of the inversion velocity

2006 ◽  
Vol 61 (20) ◽  
pp. 6667-6690 ◽  
Author(s):  
R. Escudié ◽  
N. Epstein ◽  
J.R. Grace ◽  
H.T. Bi
Keyword(s):  
Fluidized Beds ◽  
Solid Liquid ◽  
Inversion Phenomenon

Electrically Induced Phase Inversion in Polyurethane/Dimethylsiloxane Blend

1999 ◽  
Vol 13 (14n16) ◽  
pp. 2011-2017 ◽  
Author(s):  
Hiroshi Kimura ◽  
Koichiro Aikawa ◽  
Yuichi Masubuchi ◽  
Jun-Ichi Takimoto ◽  
Kiyohito Koyama ◽  
...  
Keyword(s):  
Electric Field ◽  
Domain Structure ◽  
Phase Inversion ◽  
Original Structure ◽  
Polypropylene Glycol ◽  
Inversion Phenomenon ◽  
Shear Fields

Recently, we have reported on an electrically induced "phase inversion" phenomenon which was discovered in a urethane-modified polypropylene glycol (UPPG)/dimethylsiloxane (DMS) blend. The phenomenon occurs when the fraction of UPPG is high but UPPG forms droplets dispersed in DMS matrix. When the electric field is applied, UPPG becomes the continuous matrix and DMS breaks into droplets. The domain morphology does not return to the original structure (DMS = matrix, UPPG = droplets) even after turning off the field. To clarify the relation between the phase inversion and the resulting ER effect, we observed the domain structure in UPPG/DMS blends under both the electric and shear fields.

scholarly journals The Power Of The Mysterious Inversion In Literary Books

2020 ◽  
Vol 02 (11) ◽  
pp. 592-598
Author(s):  
Tilavova Malika Mamaraimovna ◽  
Keyword(s):  
Translation Studies ◽  
Literary Device ◽  
Literary Devices ◽  
Inversion Phenomenon

Language is a great blessing given to humanity, literary devices that make the language shiny, colorful, meaningful, an inversion literary device that enhances clarity with formality and emphasis, its importance and important functions, types, uses and the Uzbek writer Tahir Malik skillfully used inversion in "Samum" and skillfully interpreted the words of the inversion phenomenon in the work and skillfully conveyed it to the reader, and words in literary books the features of magic enhancement, translation studies on inversion, and their importance are covered in detail in this article.

THE TRAFFIC BOTTLENECK EFFECTS CAUSED BY THE LANE CLOSING IN THE CELLULAR AUTOMATA MODEL

2003 ◽  
Vol 14 (10) ◽  
pp. 1295-1303 ◽  
Author(s):  
BIN JIA ◽  
RUI JIANG ◽  
QING-SONG WU
Keyword(s):  
Cellular Automata ◽  
Traffic Flow ◽  
Flow Rate ◽  
Flow Model ◽  
Maximum Flow ◽  
Density Inversion ◽  
Cellular Automata Model ◽  
Traffic Flow Model ◽  
Density Distributions ◽  
Inversion Phenomenon

As a kind of bottleneck, the lane closing has seldomly been investigated with cellular automata model. In this paper, we study this issue using the cellular automata traffic flow model. The capacity and the density distribution of this kind of bottleneck are discussed in details. We find that (i) the capacity of the bottleneck is a little smaller than the maximum flow rate of single-lane road; (ii) different regulations may lead to different density distributions of the vehicles upstream of the lane closing. Moreover, the density inversion phenomenon is reported under certain conditions. This enlightens us to propose that the phenomenon of density inversion reported in many publications may be caused by the bottlenecks on the highway.

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