Numerical Simulation of Tracers Transport Process in Water Model of a Vacuum Refining Unit: Single Snorkel Refining Furnace

2020 ◽  
Vol 91 (8) ◽  
pp. 2000022 ◽  
Author(s):  
Yuxing Zhang ◽  
Chao Chen ◽  
Wanming Lin ◽  
Yanchong Yu ◽  
Dianyu E ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Transport Process ◽  
Water Model ◽  
Vacuum Refining ◽  
Refining Unit

scholarly journals Numerical Simulation of Phosphorus Removal from Silicon by Induction Vacuum Refining

2011 ◽  
Vol 42 (8) ◽  
pp. 2214-2225 ◽  
Author(s):  
Songsheng Zheng ◽  
Thorvald Abel Engh ◽  
Merete Tangstad ◽  
Xue-Tao Luo
Keyword(s):  
Numerical Simulation ◽  
Phosphorus Removal ◽  
Vacuum Refining

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.

DNS Study of Transitional Channel Flow Accompanied by Turbulent-Stripe Structures

2010 ◽  
Author(s):  
Shizuma Kaneko ◽  
Takahiro Tsukahara ◽  
Yasuo Kawaguchi
Keyword(s):  
Numerical Simulation ◽  
Reynolds Number ◽  
Transport Process ◽  
Energy Transport ◽  
Fluid Motion ◽  
Turbulent Energy ◽  
Regular Pattern ◽  
Plane Poiseuille Flow ◽  
Reynolds Stresses ◽  
Turbulent Region

A regular pattern of turbulent and quasi-laminar fluid motion is known to appear in plane Poiseuille flow near the lowest Reynolds number for which turbulence can be sustained. We focused on this transitional structure called the turbulent stripe and investigated its energy transport process, using a direct numerical simulation. We obtained the budget for Reynolds stresses including v′w′ and w′u′. The spatial outline of the energy transport with respect to the turbulent stripe is proposed. The turbulent energy is produced in both the turbulent region and the quasi-laminar region, and the energy transfer between these two regions is found to be small.

Numerical simulation of aerodynamic force and moored state in airship transport process

2021 ◽  
Author(s):  
Yuan Liu ◽  
Baogang Geng ◽  
Yongdong Zhang ◽  
Ziwei Wang ◽  
Du Lu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Transport Process ◽  
Aerodynamic Force

Water Model on Fine Inclusion Removal by Bubble Flotation in RH Refining Process

2014 ◽  
Vol 528 ◽  
pp. 107-111 ◽  
Author(s):  
Chun Jie Yang ◽  
Fu Ping Tang ◽  
Tao He ◽  
Qiang Fu
Keyword(s):  
Gas Flow ◽  
Influence Factor ◽  
Treatment Time ◽  
Similarity Theory ◽  
Removal Rate ◽  
Water Model ◽  
Gas Flow Rate ◽  
Inclusion Removal ◽  
Vacuum Refining ◽  
Optimal Values

With the development of socio-economic and science and technology, People are more strict to the requirement of steel quality. A physical model was established according to the “similarity theory” to simulate the real 180t RH-TB vacuum refining device. Liquid steel is simulated by Nacl solution, Fine inclusions is simulated by high density polypropylene less than 0.04mm in diameter. The influence regularity of treatment time, lift gas flow rate and method of addition, the amount and time of NaHCO3 addition on the inclusions removal rate have been discussed, the optimal values for each influence factor have been found and can be used in optimizing the refining technology.

scholarly journals A Shallow Water model for the numerical simulation of overland flow on surfaces with ridges and furrows

2012 ◽  
Vol 31 ◽  
pp. 44-52 ◽  
Author(s):  
Ulrich Razafison ◽  
Stéphane Cordier ◽  
Olivier Delestre ◽  
Frédéric Darboux ◽  
Carine Lucas ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Shallow Water ◽  
Overland Flow ◽  
Water Model ◽  
Shallow Water Model

scholarly journals Characterization of the Mixing Flow Structure of Molten Steel in a Single Snorkel Vacuum Refining Furnace

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 400 ◽  
Author(s):  
Fengsheng Qi ◽  
Jinxin Liu ◽  
Zhongqiu Liu ◽  
Sherman Cheung ◽  
Baokuan Li
Keyword(s):  
Free Surface ◽  
Flow Rate ◽  
Gas Flow ◽  
Structural Parameters ◽  
Three Dimensional ◽  
Steel Production ◽  
Experimental System ◽  
Water Model ◽  
Vacuum Refining ◽  
Refining Efficiency

With the demand of high-quality steel and miniaturization of the special steel production, single snorkel vacuum refining process has been widely concerned in China recently, because of its simple structure and good performance of degassing and decarburization. In this study, a water model experimental system and a three-dimensional mathematical model based on two-fluid multiphase flow model have been built to analyze the refining efficiency limitation of the single snorkel vacuum refining furnace from the flow pattern and gas distribution. The results showed that there is a limited gas flow rate, and beyond this flow rate the gas column deviates to the wall and the redundant bubbles escape from the free surface, which will not further improve the refining efficiency and will lead to the erosion of the snorkel. In this case, the limited flow rate is 900 NL/h. Furthermore, the fluctuation of the free surface and the different structural parameters have significant effects on the flow field in single-snorkel vacuum refining furnace (SSF).

scholarly journals Transient Fluid Flow Phenomena in a Gas Stirred Liquid Bath with Top Oil Layer—Approach by Numerical Simulation and Water Model Experiments

2001 ◽  
Vol 41 (10) ◽  
pp. 1165-1172 ◽  
Author(s):  
Jeong Whan Han ◽  
Seung Hwan Heo ◽  
Dong Heun Kam ◽  
Byung Don You ◽  
Jong Jin Pak ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Fluid Flow ◽  
Liquid Bath ◽  
Water Model ◽  
Model Experiments ◽  
Flow Phenomena
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