Water Modelling on the Effect of Trapezoidal Nozzle on Vortex during Teeming in Ladle

2011 ◽  
Vol 295-297 ◽  
pp. 716-719
Author(s):  
Rui Lin ◽  
Zheng Guo Yan ◽  
Tao Liu ◽  
Jing Kun Yu
Keyword(s):  
Cross Section ◽  
Late Stage ◽  
Model Experiment ◽  
Critical Level ◽  
Research Work ◽  
Water Model ◽  
Steel Ladle ◽  
Critical Height ◽  
Slag Entrapment

Based on approximation principle, water model experiment was carried out during teeming in a 60t steel ladle. Based on the previous research work, trapezoidal nozzlein with lager upper cross section was used to decrease the critical level of vortex in order to reduce the slag entrapment to the tundish. Different shape and height of upper part of the nozzle was investigated mainly to inhibit the vortex at the late stage of ladle teeming. When upper shape of trapezoidal nozzle is square, upper height is 20mm and 17mm, and eccentricity of nozzle is 3/4, critical height of vortex is about 34mm and 31mm. In this case, slag entrapment is controlled effectively and metal utilization is optimized more completely.

scholarly journals Physical Simulation of Molten Steel Homogenization and Slag Entrapment in Argon Blown Ladle

Processes ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 479 ◽  
Author(s):  
Yang ◽  
Jin ◽  
Zhu ◽  
Dong ◽  
Lin ◽  
...  
Keyword(s):  
Flow Rate ◽  
Molten Steel ◽  
Physical Simulation ◽  
Mixing Time ◽  
Water Model ◽  
Steel Ladle ◽  
Argon Flow Rate ◽  
Argon Flow ◽  
Slag Thickness ◽  
Slag Entrapment

Argon stirring is one of the most widely used metallurgical methods in the secondary refining process as it is economical and easy, and also an important refining method in clean steel production. Aiming at the issue of poor homogeneity of composition and temperature of a bottom argon blowing ladle molten steel in a Chinese steel mill, a 1:5 water model for 110 t ladle was established, and the mixing time and interface slag entrainment under the different conditions of injection modes, flow rates and top slag thicknesses were investigated. The flow dynamics of argon plume in steel ladle was also discussed. The results show that, as the bottom blowing argon flow rate increases, the mixing time of ladle decreases; the depth of slag entrapment increases with the argon flow rate and slag thickness; the area of slag eyes decreases with the decrease of the argon flow rate and increase of slag thickness. The optimum argon flow rate is between 36–42 m3/h, and the double porous plugs injection mode should be adopted at this time.

Finite element simulation on the relationship between pressure and displacement for the waist of elastic pantyhose

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Rui Dan ◽  
Zhen Shi
Keyword(s):  
Finite Element ◽  
Cross Section ◽  
Research Work ◽  
Lumbar Vertebrae ◽  
Objective Evaluation ◽  
Quadratic Equation ◽  
New Method ◽  
Content Type ◽  
Displacement Distribution ◽  
The Relationship

PurposeObjective appraisal of pressure comfort is the key point of optimal designing of clothing. The purpose of this paper is to study a new method to provide pressure comfort for the waist of elastic pantyhose through the relationship between pressure and displacement using the finite element method (FEM).Design/methodology/approachThis paper presented a simulation model of the waist cross section consisting of three parts, namely skin, soft tissue and lumbar vertebrae, respectively, according to CT scan. The finite element the model of waist cross-section was established using Mimics software. The pressure–displacement quadratic equation can be obtained using ANSYS software and fitting curves. Meanwhile, we divide the waist cross-section into 12 equal regions according to angle, and then the area shrinkage mass of the waist cross-section can be calculated, respectively.FindingsIn this research work, we got the displacement distribution trend of elastic pantyhose at the waist cross section according to the area shrinkage mass of 12 regions, and this displacement could be used as an objective evaluation index for pressure comfort. All these solutions supply a theoretical reference for optimal design of the women's elastic pantyhose.Originality/valueThe paper analyzed the relationship between pressure and displacement for the waist of elastic pantyhose using FEM, and then got the displacement distribution trend of elastic pantyhose at the waist cross section according to the area shrinkage mass of different regions. It can supply a new method to appraise pressure comfort.

Effect of Slag Layer on Flow Patterns in a Gas Stirred Ladle

2006 ◽  
Vol 510-511 ◽  
pp. 490-493 ◽  
Author(s):  
Sung-Ho Cho ◽  
Sung Hwan Hong ◽  
Jeong Whan Han ◽  
Byung Don You
Keyword(s):  
Numerical Simulation ◽  
Flow Pattern ◽  
Model Experiment ◽  
Central Area ◽  
Side Wall ◽  
Slag Layer ◽  
Flow Patterns ◽  
Water Model ◽  
Slag Viscosity ◽  
Mixing Behavior

Flow patterns and mixing behaviors in a gas stirred steelmaking ladle with a slag layer were discussed using a water model experiment as well as a numerical simulation. While the water model experiment was performed to investigate the effect of slag on the mixing behavior in ladle, the numerical simulation was carried out to figure out the flow pattern in ladle with a slag layer. Slag viscosity and its thickness in ladle were considered as major variables. It was found that a slag layer made a great change in the flow pattern in ladle, which, in turn, affected on the mixing behavior in ladle. A flow pattern without a slag layer showed that rising bubbles eventually made a recirculation loop at the central area of the ladle and this flow pattern was regarded as a favorable flow pattern for the better mixing behavior. However, a flow pattern with a slag layer showed distorted and localized recirculating loop near side wall below slag layer. This eventually gave a longer mixing time in ladle with a slag layer. Moreover, as the gas flow rate increases, slag existing on top of the ladle was found to be entrained into the melt. Slag viscosity and its thickness were found to be major variables affecting the behavior of slag entrainment. Lower the slag viscosity and thicker the slag layer, much more slag on top of the melt was entrained into the melt.

Water model experiment of removal of inclusions in liquid steel by bubble flotation

2008 ◽  
Vol 105 (6) ◽  
pp. 309-316
Author(s):  
H. Arai ◽  
R. Otake ◽  
K. Matsumoto ◽  
S. Taniguchi
Keyword(s):  
Liquid Steel ◽  
Model Experiment ◽  
Water Model

scholarly journals A STUDY OF RESEARCH NOTIONS IN WIRELESS BODY SENSOR NETWORK (WBSN)

2019 ◽  
Vol 01 (02) ◽  
pp. 77-86
Author(s):  
Dinesh Kumar ◽  
Kalaipriyan T ◽  
Raghav R.S.
Keyword(s):  
Human Body ◽  
Critical Level ◽  
Research Work ◽  
Cooperative Networks ◽  
The Body ◽  
Body Sensor Networks ◽  
Health Issues ◽  
Communication Module ◽  
Body Sensors ◽  
Different Levels

The Body Sensor Networks is captivated in gathering the communication module in a more reliable manner along with efficiency in terms of energy, more secure than earlier schema’s, ands enhanced utilization of resources. Wireless BAN (WBAN) has the tendency to be placed even inside the human body. The significance of BSN has the tendency to go through all aspects such as fitness of a person, his/her health issues, caring in critical level, and so on. In 2014 [1] the elevation of body sensors has been grown upto 420 millions from 11 million units in 2009. In this research work, we addressed BAN from On-Body to Body-to-Body cooperative networks at different levels: propagation, protocols and localization applications.

scholarly journals Dynamic Behavior of Cavity Formed by a Top-blown Jet on Liquid Surface: Water Model Experiment

2015 ◽  
Vol 101 (2) ◽  
pp. 74-81 ◽  
Author(s):  
Kazuyuki Ueno ◽  
Kouji Takatani ◽  
Toshio Ishii ◽  
Shin-Ichi Shimasaki ◽  
Osamu Nakamura ◽  
...  
Keyword(s):  
Surface Water ◽  
Dynamic Behavior ◽  
Model Experiment ◽  
Liquid Surface ◽  
Water Model

scholarly journals Water Model Experiment on Mixing Time in a Cylindrical Bath Agitated by Swirling Molten Steel Jet

2004 ◽  
Vol 90 (6) ◽  
pp. 371-378 ◽  
Author(s):  
Jin YOSHIDA ◽  
Daisuke IGUCHI ◽  
Manabu IGUCHI
Keyword(s):  
Molten Steel ◽  
Model Experiment ◽  
Mixing Time ◽  
Water Model

Numerical Simulation of Acoustic Resonance in Closed Side Branch With Different Cross-Section Shapes

2018 ◽  
Author(s):  
Jiang LiuYi ◽  
Zhang Hong ◽  
Duan QingQuan
Keyword(s):  
Cross Section ◽  
Research Work ◽  
Branch Pipe ◽  
Acoustic Resonance ◽  
Side Branch ◽  
Pipeline System ◽  
Detached Eddy Simulation ◽  
Cross Section Shape ◽  
Section Shape ◽  
The Cross

There are many closed side branches in the gas conveying pipeline system. When the gas passes through the closed side branch, the shear layer will arouse the acoustic resonance in the closed side branch, which is harmful to the safe operation of the pipeline. The research work is insufficient about the influence of the cross-section shape of the closed side branch on acoustic resonance. Using the Detached-Eddy Simulation (DES) model, the acoustic resonance characteristics caused by the side branch pipe with different square cross-sections are simulated at the inlet boundary conditions of 25 m/s, 30 m/s and 35 m/s. The results show that in the center axis of the side branch, a 1/4 wavelength standing wave was formed, and the acoustic resonance occurs at a higher Strouhal number in circular branch. The cross-section shape of the side branch does not affect the acoustic resonance frequency, but it has a certain influence on the amplitude of pressure fluctuation and has a significant influence on the high-order frequency components.

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