Incorporation of fragmentation into a volume average solidification model

In this article, the authors demonstrate a tendency among consumers to use the arithmetic mode as a heuristic basis when drawing inferences from graphical displays of online rating distributions in such a way that service evaluations inferred from rating distributions systematically vary by the location of the mode. The rationale underlying this phenomenon is that the mode (i.e., the most frequent rating which is represented by the tallest bar in a graphical display) attracts consumers’ attention because of its visual salience and is thus disproportionately weighted when they draw conclusions. Across a series of eight studies, the authors provide strong empirical evidence for the existence of the mode heuristic, shed light on this phenomenon at the process level, and demonstrate how consumers’ inferences based on the mode heuristic depend on the visual salience of the mode. Together, the findings of these studies contribute to a better understanding of how service customers process and interpret graphical illustrations of online rating distributions and provide companies with a new key figure that—aside from rating volume, average ratings, and rating dispersion—should be incorporated in the monitoring, analyzing, and evaluating of review data.

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Heat Transfer and Solidification Model of Slab Continuous Casting Based on Nail-Shooting Experiments

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1088.153 ◽

2015 ◽

Vol 1088 ◽

pp. 153-158 ◽

Cited By ~ 1

Author(s):

An Gui Hou ◽

Yi Min ◽

Cheng Jun Liu ◽

Mao Fa Jiang

Keyword(s):

Heat Transfer ◽

Continuous Casting ◽

Liquid Core ◽

Casting Process ◽

Soft Reduction ◽

Slab Continuous Casting ◽

Solidification Model ◽

Core Length ◽

Measurement Results ◽

Heat Transfer And Solidification

A heat transfer and solidification model of slab continuous casting process was developed, and the nail-shooting experiments were carried out to verify and improve the prediction accuracy. The comparison between the simulation and the measurements results showed that, there exists difference between the model predicted liquid core length and the calculated liquid core length according to the measurement results of the solidification shell thickness. In the present study, the value of constant a in the heat transfer coefficient calculation formula was corrected through back-calculation, results showed that, the suitable value of a is 31.650, 33.468 and 35.126 when the casting speed is 0.8m·min-1, 0.9m·min-1 and 1.0m·min-1 respectively, which can meet the liquid core length of the measurement results. The developed model built a foundation for the application of dynamic secondary cooling, and dynamic soft reduction.

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On the Accelerated Settling of Fine Particles in a Bidisperse Slurry

Mathematical Problems in Engineering ◽

10.1155/2015/169125 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Leonid L. Minkov ◽

Yuliya O. Stepanova ◽

Johann Dueck ◽

Elizaveta V. Pikushchak

Keyword(s):

Fine Particles ◽

Stokes Equations ◽

Fine Fraction ◽

Particle Diameter ◽

Sedimentation Velocity ◽

Navier Stokes ◽

Circulation Zone ◽

Navier Stokes Equations ◽

Volume Average ◽

Bidisperse Suspension

An estimation of increasing the volume average sedimentation velocity of fine particles in bidisperse suspension due to their capturing in the circulation zone formed in the laminar flow of incompressible viscous fluid around the spherical coarse particle is proposed. The estimation is important for an explanation of the nonmonotonic shape of the separation curve observed for hydrocyclones. The volume average sedimentation velocity is evaluated on the basis of a cellular model. The characteristic dimensions of the circulation zone are obtained on the basis of a numerical solution of Navier-Stokes equations. Furthermore, these calculations are used for modelling the fast sedimentation of fine particles during their cosedimentation in bidisperse suspension. It was found that the acceleration of sedimentation of fine particles is determined by the concentration of coarse particles in bidisperse suspension, and the sedimentation velocity of fine fraction is proportional to the square of the coarse and fine particle diameter ratio. The limitations of the proposed model are ascertained.

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