Numerical simulation on a dynamic mixing process in ducts of a rotary pressure exchanger for SWRO

2009 ◽  
pp. 107-113 ◽  
Author(s):  
. Yihui Zhou ◽  
Xinwei Ding ◽  
. Maowei Ju ◽  
Yuqing Chang
Keyword(s):  
Numerical Simulation ◽  
Mixing Process ◽  
Rotary Pressure Exchanger

Numerical simulation of reactive mixing process in a stirred reactor with the DQMOM-IEM model

2019 ◽  
Vol 360 ◽  
pp. 1177-1187 ◽  
Author(s):  
Xiaoxia Duan ◽  
Xin Feng ◽  
Zai-Sha Mao ◽  
Chao Yang
Keyword(s):  
Numerical Simulation ◽  
Mixing Process ◽  
Stirred Reactor ◽  
Reactive Mixing

Numerical simulation of the fluid flow and the mixing process in a static mixer

1995 ◽  
Vol 38 (12) ◽  
pp. 2239-2250 ◽  
Author(s):  
E. Lang ◽  
P. Drtina ◽  
F. Streiff ◽  
M. Fleischli
Keyword(s):  
Numerical Simulation ◽  
Fluid Flow ◽  
Static Mixer ◽  
Mixing Process

scholarly journals A Numerical simulation of mixing process of Two-phase Flow by MPS Method

2001 ◽  
Vol 4 ◽  
pp. 103-111
Author(s):  
Kensaku MATSUMOTO ◽  
Shigeki KOBATAKE ◽  
Yoshihiko SHIMIZU ◽  
Masahiro SUGIYAMA ◽  
Ioakim IOAKIM
Keyword(s):  
Numerical Simulation ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Mixing Process ◽  
Two Phase ◽  
Mps Method

Numerical Simulation of Turbulent Mixing for Dislocated Blades in a Stirred Tank

2011 ◽  
Vol 354-355 ◽  
pp. 559-563
Author(s):  
Lei Shi ◽  
Shen Jie Zhou ◽  
Feng Ling Yang ◽  
Fan Jin Hu
Keyword(s):  
Numerical Simulation ◽  
Turbulent Mixing ◽  
Stirred Tank ◽  
Industrial Processes ◽  
Mixing Efficiency ◽  
Mixing Process ◽  
Flow Number ◽  
Stirred Tanks ◽  
Calculation Results ◽  
Better Than

Mixing efficiency is an important parameter in the design of many industrial processes in stirred tanks. In this study, CFD technology was used to simulate the mixing process inside the stirred tank with dislocated blades and standard turbine. Calculations were performed to study the effects of agitator speed and the configuration of impellers on mixing efficiency. The results showed that the flow field in the stirred tank with the dislocated blades is better than the standard turbine, and the flow number of the dislocated blades had been improved while the power number had been reduced. According to calculation results of Wr, we found the mixing efficiency of the dislocated blades had been improved about 4 times than that of standard turbine.

scholarly journals A study of the flow-field evolution and mixing in a planar turbulent jet using direct numerical simulation

2002 ◽  
Vol 450 ◽  
pp. 377-407 ◽  
Author(s):  
S. A. STANLEY ◽  
S. SARKAR ◽  
J. P. MELLADO
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Direct Numerical Simulation ◽  
Large Scale ◽  
Computational Study ◽  
Practical Interest ◽  
Small Scale ◽  
Mixing Process ◽  
Mean Velocity ◽  
Small Scales

Turbulent plane jets are prototypical free shear flows of practical interest in propulsion, combustion and environmental flows. While considerable experimental research has been performed on planar jets, very few computational studies exist. To the authors' knowledge, this is the first computational study of spatially evolving three-dimensional planar turbulent jets utilizing direct numerical simulation. Jet growth rates as well as the mean velocity, mean scalar and Reynolds stress profiles compare well with experimental data. Coherency spectra, vorticity visualization and autospectra are obtained to identify inferred structures. The development of the initial shear layer instability, as well as the evolution into the jet column mode downstream is captured well.The large- and small-scale anisotropies in the jet are discussed in detail. It is shown that, while the large scales in the flow field adjust slowly to variations in the local mean velocity gradients, the small scales adjust rapidly. Near the centreline of the jet, the small scales of turbulence are more isotropic. The mixing process is studied through analysis of the probability density functions of a passive scalar. Immediately after the rollup of vortical structures in the shear layers, the mixing process is dominated by large-scale engulfing of fluid. However, small-scale mixing dominates further downstream in the turbulent core of the self-similar region of the jet and a change from non-marching to marching PDFs is observed. Near the jet edges, the effects of large-scale engulfing of coflow fluid continue to influence the PDFs and non-marching type behaviour is observed.

Numerical Simulation of Two-Phase Liquid–liquid Flow in a New Static Mixer Structure

2011 ◽  
Vol 368-373 ◽  
pp. 1604-1607
Author(s):  
Hong Yan Zhang ◽  
Hai Hong Dong
Keyword(s):  
Numerical Simulation ◽  
Liquid Flow ◽  
Transport Model ◽  
Simulation Method ◽  
Static Mixer ◽  
Mixing Process ◽  
Two Phase ◽  
Species Transport ◽  
Mixing Effect ◽  
Phase Liquid

In this article, Spiral belt static mixer with changing diameter was taken as the object. The numerical simulation method was used to investigate the mixing process of two-phase liquid–liquid flow in water treatment by a commercial CFD code,namely Fluent.The k-ε model and species transport model were established to research this project. Then the mixing effect was compared with that of HEV static mixer. The result showed that spiral belt static mixer with changing diameter promote the mixing effect greatly. The mixing effect relative to that of HEV static mixer increased 10 times and the the pressure loss only increased 3 times.

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