Experiments on gas entrainment phenomena due to free surface vortex induced by flow passing beside stagnation region

2019 ◽  
Vol 350 ◽  
pp. 90-97 ◽  
Author(s):  
Toshiki Ezure ◽  
Kei Ito ◽  
Masaaki Tanaka ◽  
Hiroyuki Ohshima ◽  
Y. Kameyama
Keyword(s):  
Free Surface ◽  
Stagnation Region ◽  
Gas Entrainment ◽  
Free Surface Vortex ◽  
Surface Vortex

scholarly journals Modeling of the Free-Surface Vortex-Driven Bubble Entrainment into Water

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 709
Author(s):  
Ryan Anugrah Putra ◽  
Dirk Lucas
Keyword(s):  
Free Surface ◽  
Bubble Size ◽  
Dynamics Simulation ◽  
Entrainment Rate ◽  
Modeling Framework ◽  
Two Phase ◽  
Gas Entrainment ◽  
Free Surface Vortex ◽  
Bubble Entrainment ◽  
Surface Vortex

The recently developed GENTOP (Generalized Two Phase Flow) concept, which is based on the multifield Euler‒Euler approach, was applied to model a free-surface vortex—a flow situation that is relevant for hydraulic intake. A new bubble entrainment model has been developed and implemented in the concept. In general, satisfactory agreement with the experimental data can be achieved. However, the gas entrainment can be significantly affected by several parameters or models used in the CFD (Computational Fluid Dynamics) simulation. The scale of curvature correction C s c a l e in the turbulence model, the coefficient in the entrainment model C e n t , and the assigned bubble size to be entrained have a significant influence on the gas entrainment rate. The gas entrainment increases with higher C s c a l e values, which can be attributed to the stronger rotation captured by the simulation. A smaller bubble size gives higher gas entrainment, while a larger bubble size leads to a smaller entrainment. The results also show that the gas entrainment can be controlled by adjusting the entrainment coefficient C e n t . Based on the modeling framework presented in this paper, further improvement of the physical modeling of the entrainment process should be done.

scholarly journals Mechanism Investigation on a Novel Oil Recovery Skimmer Coupling Free Surface Vortex and Cyclone Separation

ACS Omega ◽  
2021 ◽  
Author(s):  
Wei An ◽  
Qingfan Zhang ◽  
Jianping Zhao ◽  
Liang Qu ◽  
Shuo Liu ◽  
...  
Keyword(s):  
Free Surface ◽  
Oil Recovery ◽  
Free Surface Vortex ◽  
Surface Vortex

Similitude in Free-Surface Vortex Formations

1974 ◽  
Vol 100 (11) ◽  
pp. 1565-1581 ◽  
Author(s):  
Larry L. Daggett ◽  
Garbis H. Keulegan
Keyword(s):  
Free Surface ◽  
Free Surface Vortex ◽  
Surface Vortex

Discussion of “Similitude in Free-Surface Vortex Formations”

1975 ◽  
Vol 101 (11) ◽  
pp. 1449-1453
Author(s):  
James A. Weller ◽  
Akalank K. Jain ◽  
Kittur G. RangaRaju
Keyword(s):  
Free Surface ◽  
Free Surface Vortex ◽  
Surface Vortex

Numerical Understanding of Free Surface Vortex Driven by Rotational Field Inside Viscous Liquid

2019 ◽  
Vol 41 (15-16) ◽  
pp. 1382-1396
Author(s):  
Mihir Prajapati ◽  
Parmod Kumar ◽  
Arup K. Das ◽  
Sushanta K. Mitra
Keyword(s):  
Free Surface ◽  
Viscous Liquid ◽  
Free Surface Vortex ◽  
Rotational Field ◽  
Surface Vortex

New idea of suppressing free surface vortex during tapping liquid steel from converter

2016 ◽  
Vol 22 (1) ◽  
pp. 136-142 ◽  
Author(s):  
Seung-Jin Lee ◽  
Sang-Joon Kim ◽  
Hae-Geon Lee
Keyword(s):  
Free Surface ◽  
Liquid Steel ◽  
Free Surface Vortex ◽  
Surface Vortex
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