Simultaneous Analysis of Concentration and Flow Fields in A Stirred Tank Using Large Eddy Simulation

2003 ◽  
Vol 27 (9) ◽  
pp. 1282-1289
Author(s):  
Hyun-Sik Yoon ◽  
Ho-Hwan Chun ◽  
Man-Yeong Ha
Keyword(s):  
Large Eddy Simulation ◽  
Flow Fields ◽  
Simultaneous Analysis ◽  
Stirred Tank ◽  
Eddy Simulation ◽  
Large Eddy

Effect of grid discontinuities on large-eddy simulation statistics and flow fields

2008 ◽  
Vol 9 ◽  
pp. N32 ◽  
Author(s):  
M. Vanella ◽  
U. Piomelli ◽  
E. Balaras
Keyword(s):  
Large Eddy Simulation ◽  
Flow Fields ◽  
Eddy Simulation ◽  
Large Eddy

Numerical study of the instantaneous flow fields by large eddy simulation and stability analysis in a single aisle cabin model

2016 ◽  
Vol 96 ◽  
pp. 1-11 ◽  
Author(s):  
ChangWei Yang ◽  
XiWen Zhang ◽  
ZhaoHui Yao ◽  
Xiaodong Cao ◽  
Junjie Liu ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Large Eddy Simulation ◽  
Numerical Study ◽  
Flow Fields ◽  
Instantaneous Flow ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals The Process of the Intensification of Coal Fly Ash Flotation Using a Stirred Tank

Minerals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 597 ◽  
Author(s):  
Lu Yang ◽  
Zhenna Zhu ◽  
Xin Qi ◽  
Xiaokang Yan ◽  
Haijun Zhang
Keyword(s):  
Fly Ash ◽  
Kinetic Energy ◽  
Large Eddy Simulation ◽  
Rotation Speed ◽  
Coal Fly Ash ◽  
Stirred Tank ◽  
Turbulent Length Scale ◽  
Mineral Particles ◽  
Eddy Simulation ◽  
Large Eddy

Pulp preconditioning using a stirred tank as a pretreatment process is vital to the flotation system, which can be used to improve the flotation efficiency of mineral particles. The kinetic energy that is dissipated in the stirred tank could strengthen the interaction process between mineral particles and flotation reagents to improve the flotation efficiency in the presence of the preconditioning. In this paper, the effect of the conditioning speed on the coal fly ash flotation was investigated using numerical simulations and conditioning-flotation tests. The large eddy simulation coupled with the Smagorinsky-Lilly subgrid model was employed to simulate the turbulence flow field in the stirred tank, which was equipped with a six blade Rushton turbine. The impeller rotation was modelled using the sliding mesh. The simulation results showed that the large eddy simulation (LES) well matched the previous experimental data. The turbulence characteristics, such as the mean velocity, turbulent kinetic energy, power consumption and instantaneous structures of trailing vortices were analysed in detail. The turbulent length scale (η) decreased as the rotation speed increased, and the minimum value of η was almost unchanged when the rotation speed was more than 1200 rpm. The conditioning-flotation tests of coal fly ash were conducted using different conditioning speeds. The results showed that the removal of unburned carbon was greatly improved due to the strengthened turbulence in the stirred tank, and the optimal results were obtained with an LOI of 3.32%, a yield of 78.69% and an RUC of 80.89% when the conditioning speed was 1200 rpm.

Shear improved Smagorinsky model for large eddy simulation of flow in a stirred tank with a Rushton disk turbine

2016 ◽  
Vol 108 ◽  
pp. 69-80 ◽  
Author(s):  
Satish Malik ◽  
Emmanuel Lévêque ◽  
Mounir Bouaifi ◽  
Lionel Gamet ◽  
Eglantine Flottes ◽  
...  
Keyword(s):  
Large Eddy Simulation ◽  
Stirred Tank ◽  
Smagorinsky Model ◽  
Eddy Simulation ◽  
Large Eddy

Large-eddy simulation of turbulent flow in a stirred tank driven by a Rushton turbine

2010 ◽  
Vol 39 (7) ◽  
pp. 1183-1190 ◽  
Author(s):  
R. Zadghaffari ◽  
J.S. Moghaddas ◽  
J. Revstedt
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Flow ◽  
Stirred Tank ◽  
Rushton Turbine ◽  
Eddy Simulation ◽  
Large Eddy

Large-eddy simulation of turbulent flow in an unbaffled stirred tank driven by a Rushton turbine

2005 ◽  
Vol 60 (8-9) ◽  
pp. 2303-2316 ◽  
Author(s):  
Raul Alcamo ◽  
Giorgio Micale ◽  
Franco Grisafi ◽  
Alberto Brucato ◽  
Michele Ciofalo
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Flow ◽  
Stirred Tank ◽  
Rushton Turbine ◽  
Eddy Simulation ◽  
Large Eddy

Large-eddy simulation of the turbulent free-surface flow in an unbaffled stirred tank reactor

2010 ◽  
Vol 65 (15) ◽  
pp. 4307-4322 ◽  
Author(s):  
N. Lamarque ◽  
B. Zoppé ◽  
O. Lebaigue ◽  
Y. Dolias ◽  
M. Bertrand ◽  
...  
Keyword(s):  
Free Surface ◽  
Large Eddy Simulation ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Stirred Tank ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Eddy Simulation ◽  
Large Eddy
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