Three dimensional CFD simulations of gas–liquid flow in milli torus reactor without agitation

2011 ◽  
Vol 50 (4) ◽  
pp. 369-376 ◽  
Author(s):  
R. Rihani ◽  
O. Guerri ◽  
J. Legrand
Keyword(s):  
Liquid Flow ◽  
Three Dimensional ◽  
Cfd Simulations ◽  
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).

Numerical Simulation of the Transient Three-Dimensional Gas-Liquid Flow in a Cylindrical Bubble Column

2006 ◽  
Author(s):  
Santiago Lai´n Beatove ◽  
Martin Sommerfeld
Keyword(s):  
Liquid Flow ◽  
Bubble Column ◽  
Three Dimensional ◽  
Dynamic Structure ◽  
Point Of View ◽  
Pressure Drag ◽  
Eddy Simulation ◽  
Discrete Phase ◽  
Quantitative Results ◽  
Gas Liquid Flow

In this paper the transient three-dimensional flow developing in a cylindrical laboratory bubble column is addressed from a numerical point of view. The simulation scheme combines a Large Eddy Simulation (LES) for describing the liquid phase and a Lagragian approach for the gas (discrete) phase. The bubble equation of motion considers all the relevant forces, i.e., buoyancy, pressure, drag, added mass and transverse lift. From the calculations, the transverse lift in combination with the drag is identified as the main mechanism allowing the bubbles to spread over the column cross-section. The liquid and gas velocity profiles obtained are compared with the experimental data and k–ε results presented in Lai´n et al. (2001). As a matter of fact, the dynamic structure of the liquid flow induced by the rising bubbles is well reproduced and also good quantitative results for all measured variables of both phases, gas and liquid, are obtained.

Modeling the Onset of Gas Entrainment in a Reduced T-Junction With Co-Current Stratified Gas-Liquid Flow

2012 ◽  
Vol 134 (8) ◽  
Author(s):  
Robert C. Bowden ◽  
Ibrahim G. Hassan
Keyword(s):  
Liquid Flow ◽  
Three Dimensional ◽  
Flow Distribution ◽  
Critical Height ◽  
Cross Sectional ◽  
Gas Entrainment ◽  
Mass Fluxes ◽  
Height Prediction ◽  
Dip Angle ◽  
Gas Liquid Flow

A model was developed to predict the onset of gas entrainment in a single downward oriented branch. The branch was installed on a horizontal square cross-sectional channel having a smooth stratified co-currently flowing gas-liquid regime in the inlet region. The branch flow was simulated as a three-dimensional point-sink while the run flow was treated as a uniform velocity at the critical dip. Experiments were performed to determine the critical liquid flow distribution between the run and the branch. A correlation was developed relating the branch Froude number to the ratio of the superficial liquid mass fluxes in the run and the branch. The correlation was used as a boundary condition in the model. A methodology was developed using digital imaging to record the coordinates of the critical dip at the onset of as entrainment. The dip angle was found to range between 40 to 60 degrees and constant dip angles of 40, 50 and 60 degrees were selected as boundary conditions. The critical height was predicted to within 50% of experiments with the error attributed to differences in the modeled and experimental geometries. A semi-empirical analysis using the experimental geometry yielded a critical height prediction to within 20% of experimental results.

Gas–liquid flow generated by a Rushton turbine in stirred vessel: CARPT/CT measurements and CFD simulations

2005 ◽  
Vol 60 (8-9) ◽  
pp. 2215-2229 ◽  
Author(s):  
A.R. Khopkar ◽  
A.R. Rammohan ◽  
V.V. Ranade ◽  
M.P. Dudukovic
Keyword(s):  
Liquid Flow ◽  
Cfd Simulations ◽  
Stirred Vessel ◽  
Rushton Turbine ◽  
Ct Measurements ◽  
Gas Liquid Flow

Application of a high-speed laser-induced fluorescence technique for studying the three-dimensional structure of annular gas–liquid flow

2011 ◽  
Vol 53 (1) ◽  
pp. 77-89 ◽  
Author(s):  
Sergey Alekseenko ◽  
Andrey Cherdantsev ◽  
Mikhail Cherdantsev ◽  
Sergey Isaenkov ◽  
Sergey Kharlamov ◽  
...  
Keyword(s):  
Liquid Flow ◽  
High Speed ◽  
Three Dimensional ◽  
Laser Induced Fluorescence ◽  
Dimensional Structure ◽  
Fluorescence Technique ◽  
Three Dimensional Structure ◽  
Gas Liquid Flow
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