Mathematical Modeling of Draining of Dual-Strand Caster Tundish With Unequal Throughputs at United States Steel Corporation

2013 ◽  
Author(s):  
Asish K. Sinha ◽  
Thomas J. Piccone ◽  
Paul D. Miller
Keyword(s):  
Mathematical Modeling ◽  
United States ◽  
Fluid Dynamics ◽  
Transient Flow ◽  
Slag Layer ◽  
The Other ◽  
Flow Modeling ◽  
Two Phase ◽  
United States Steel Corporation ◽  
Initial Slag

Mathematical modeling of the tundish draining process was undertaken in response to the pouring of slag into the caster mold during draining of the dual-strand caster tundish at one of United States Steel Corporation’s plants before a tundish change. It was observed upon dumping of the tundish that the tundish skull was mostly slag on one side (the strand with the slag in the mold) and nearly all steel on the other. The current study attempted to reproduce the tundish draining event via mathematical modeling using the PHOENICS computational fluid dynamics software. The tundish draining was modeled for the case where the throughput of one strand was double that of the other strand. Transient flow modeling of the draining process included solving for the pressure and velocities for the two-phase slag-steel flows for two cases, one with a 6-inch thick slag layer and one with a 2-inch slag layer. The results showed that the draining process was affected significantly by the thickness of the initial slag layer. The simulations also qualitatively predicted the tendency of the slag to accumulate on the side with the higher throughput during tundish draining for a dual-strand tundish containing dams on both sides of the pouring area in the center.

CFD Simulation of Hydraulics of Dividing Wall Sieve Trays

2012 ◽  
Vol 476-478 ◽  
pp. 1345-1350
Author(s):  
Yan Wang ◽  
Song Du ◽  
Huai Gong Zhu ◽  
He Xu Ma ◽  
Shao Qing Zuo
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Cfd Simulation ◽  
The Other ◽  
Phase Flow ◽  
Cfd Model ◽  
Two Phase ◽  
Sieve Tray ◽  
Commercial Scale ◽  
Computational Fluid Dynamics Cfd

A 3D two-phase flow computational fluid dynamics (CFD) model containing gas mal-distribution is developed in the Eulerian framework to predict the hydraulics of a dividing wall sieve tray. Variable and position dependent gas superficial velocity is used in the calculation. Using water-air system, simulations of flow patterns and hydraulics of a commercial- scale 1.2m diameter sieve tray are carried out using this model to testify its precision. Then, the same simulations of a dividing wall sieve tray with equal diameter are carried out. The results show that there are two backflow regions on a dividing wall tray, one is in the segmental area, and the other is in the region nearby junction of dividing wall and outlet weir. In the segmental area of trays with equal diameter, the area of backflow region of dividing wall trays is basically equal to that of conventional trays.

Two Phase Flow Modeling of the Interior Ballistics for a Naval Medium Caliber Gun with Guided Projectile

2013 ◽  
Vol 465-466 ◽  
pp. 531-535
Author(s):  
Hazem Elsadek ◽  
Xiao Bing Zhang ◽  
Mahmod M. Rashad ◽  
Cheng Cheny
Keyword(s):  
Fluid Dynamics ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Flow Modeling ◽  
Governing Equations ◽  
Ballistic Performance ◽  
Two Phase ◽  
Interior Ballistics ◽  
Simulation Results ◽  
Good Agreement

This paper discusses the two phase (gas/Particles) flow effect of interior ballistic performance in a 76 mm naval medium caliber gun with guided projectile, using granular seven-perforated propellant. The theoretical and numerical simulation of the two phase flow in the interior ballistic cycle is carried out by using MacCromack technique depending on the governing equations of the two phase flow. This simulation is considered to be helpful for the prediction of the interior ballistic parameters which are required for endurance of guided projectile. A good agreement between the simulation results compared to the experimental results is fulfilled. Keywords: Guided projectile, two phase flow modeling, Interior ballistic, Computational fluid dynamics.

Working With Interpreters to Support Students Who Are English Language Learners

2016 ◽  
Vol 1 (16) ◽  
pp. 15-27 ◽  
Author(s):  
Henriette W. Langdon ◽  
Terry Irvine Saenz
Keyword(s):  
United States ◽  
English Language Learners ◽  
Language Learners ◽  
English Language ◽  
First Language ◽  
The United States ◽  
The Other ◽  
Primary Language ◽  
Second Best ◽  
Support Students

The number of English Language Learners (ELL) is increasing in all regions of the United States. Although the majority (71%) speak Spanish as their first language, the other 29% may speak one of as many as 100 or more different languages. In spite of an increasing number of speech-language pathologists (SLPs) who can provide bilingual services, the likelihood of a match between a given student's primary language and an SLP's is rather minimal. The second best option is to work with a trained language interpreter in the student's language. However, very frequently, this interpreter may be bilingual but not trained to do the job.

FUNDAMENTALS OF TWO-PHASE FLOW MODELING

1994 ◽  
Vol 8 (1-4) ◽  
pp. 1-67 ◽  
Author(s):  
Graham B. Wallis ◽  
Donald A. Drew
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Flow Modeling ◽  
Two Phase

Armed Violence in the Ideology of Contemporary Islamic Fundamentalism - Study models

2019 ◽  
Vol 2 (4) ◽  
pp. 237
Author(s):  
Laith Mzahim Khudair Kazem
Keyword(s):  
United States ◽  
United States Of America ◽  
The United States ◽  
The Other ◽  
Islamic Fundamentalism ◽  
Islamic Movements ◽  
Important Means ◽  
Armed Violence ◽  
Goals And Objectives ◽  
At Home

The armed violence of many radical Islamic movements is one of the most important means to achieve the goals and objectives of these movements. These movements have legitimized and legitimized these violent practices and constructed justification ideologies in order to justify their use for them both at home against governments or against the other Religiously, intellectually and even culturally, or abroad against countries that call them the term "unbelievers", especially the United States of America.

USS AR 360

Alloy Digest ◽  
1977 ◽  
Vol 26 (5) ◽  
Keyword(s):  
United States ◽  
Corrosion Resistance ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Alloy Steel ◽  
Heat Treating ◽  
Low Alloy Steel ◽  
Materials Handling ◽  
United States Steel Corporation ◽  
Major Consideration

Abstract USS AR 360 is a quenched-and-tempered low-alloy steel designed to fit a broad range of applications where resistance to abrasion is a major consideration. It is used to produce components for mining and materials handling equipment and agricultural implements. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, joining, and surface treatment. Filing Code: SA-332. Producer or source: United States Steel Corporation.

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