Visualization and quantitative analysis of dispersive mixing by a helical static mixer in upward co-current gas–liquid flow

2015 ◽  
Vol 262 ◽  
pp. 527-540 ◽  
Author(s):  
Swapna Rabha ◽  
Markus Schubert ◽  
Fanny Grugel ◽  
Manuel Banowski ◽  
Uwe Hampel
Keyword(s):  
Quantitative Analysis ◽  
Liquid Flow ◽  
Static Mixer ◽  
Gas Liquid Flow ◽  
Dispersive Mixing

Liquid phase residence time distribution for gas–liquid flow in Kenics static mixer

2008 ◽  
Vol 47 (12) ◽  
pp. 2275-2280 ◽  
Author(s):  
Tirupati Reddy Keshav ◽  
P. Somaraju ◽  
K. Kalyan ◽  
A.K. Saroha ◽  
K.D.P. Nigam
Keyword(s):  
Liquid Phase ◽  
Residence Time ◽  
Liquid Flow ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Static Mixer ◽  
Gas Liquid Flow

scholarly journals Numerical simulation of the gas-liquid flow inside a horizontal static mixer

2020 ◽  
Vol 5 (2) ◽  
pp. 1-7
Author(s):  
Ryan Anugrah Putra ◽  
Akhlisa Nadiantya Aji Nugroho
Keyword(s):  
Liquid Flow ◽  
Liquid Velocity ◽  
Superficial Velocity ◽  
Static Mixer ◽  
Cfd Simulations ◽  
Mixing Behavior ◽  
Computational Fluid Dynamics Cfd ◽  
Gas Liquid Flow ◽  
Gas Layer ◽  
Superficial Liquid Velocity

The gas-liquid flow inside a horizontal static mixer was numerically investigated by using Euler-Euler Computational Fluid Dynamics (CFD) simulations. The results confirm that the liquid superficial velocity plays a significant role on the mixing behavior of the gas and liquid. The mixing behavior in this present study at a liquid superficial velocity of 0.2 m/s was the worst both axially and radially. Increasing the liquid superficial velocity significantly improve the mixing between gas and liquid. However, the unwanted gas layer still can be found at the superficial liquid velocity less than 0.8 m/s. A good mixing behavior in this study was achieved at a relatively high velocity (i.e. larger than 0.8 m/s).

scholarly journals The flow and mass transfer characteristics of concentric gas-liquid flow in an advanced static mixer

2020 ◽  
pp. 24-24
Author(s):  
Huibo Meng ◽  
Zhonggen Li ◽  
Yanfang Yu ◽  
Mengqi Han ◽  
Shuning Song ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Liquid Flow ◽  
Operating Conditions ◽  
Static Mixer ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients ◽  
Local Mass ◽  
Transfer Characteristics ◽  
Local Mass Transfer ◽  
Gas Liquid Flow

The fluid dynamic and mass transfer characteristics of concentric upward gas-liquid flow were studied in the industrial static mixer with four equally spaced helical inserts (FKSM). The numerical simulations of gas volume fraction in Kenics mixer had a good agreement with the numerical and experimental results provided by Rabha et al. The characteristics of radial gas void fraction and local mass transfer coefficients in the FKSM were evaluated under different operating conditions. The velocity profiles of concentric air phase accelerated by the bubble forces firstly became sharp and narrow until z/l=-3.27 and then slowly decreased and stabilized at z/l=-1.5 before entering the first mixing element. Some extra unimodal profile of radial gas holdup gradually generated near the rectangle cross sections of mixing elements. The ?G gradually enlarged from r/R=0.2 to r/R=0.55 and then weakened from r/R=0.65 to r/R=0.874. The air void fractions in the bulk flow region decreased with the increasing initial uniform bubble diameter. The inlet effect of first leading edge enhanced the air phase dispersion and local mass transfer coefficients sharply increased from 2.04 to 3.69 times of that in the inlet. The local mass transfer coefficients in each mixing group had unimodal profiles.

Simulation of gas–liquid flow in a helical static mixer

2015 ◽  
Vol 137 ◽  
pp. 476-486 ◽  
Author(s):  
F. Zidouni ◽  
E. Krepper ◽  
R. Rzehak ◽  
S. Rabha ◽  
M. Schubert ◽  
...  
Keyword(s):  
Liquid Flow ◽  
Static Mixer ◽  
Gas Liquid Flow

Vortex Precession in a Gas-Liquid Flow

2010 ◽  
Vol 41 (4) ◽  
pp. 465-478 ◽  
Author(s):  
S. I. Shtork ◽  
Sergei Alekseenko ◽  
V. L. Okulov ◽  
P. A. Kuibin
Keyword(s):  
Liquid Flow ◽  
Vortex Precession ◽  
Gas Liquid Flow
Sign in / Sign up

Export Citation Format

Share Document