Velocity Field and Bubble Size Measurements of a Gas/liquid Flow Across a T-junction

2018 ◽  
Author(s):  
Y.S. Gavioli ◽  
V.Y. Aibe ◽  
Juliana Braga Rodrigues Loureiro
Keyword(s):  
Velocity Field ◽  
Liquid Flow ◽  
Bubble Size ◽  
Gas Liquid Flow

Velocity field in isothermal turbulent bubbly gas-liquid flow through a pipe

1996 ◽  
Vol 21 (5) ◽  
pp. 347-356 ◽  
Author(s):  
V. Velidandla ◽  
S. Putta ◽  
R. P. Roy
Keyword(s):  
Velocity Field ◽  
Liquid Flow ◽  
Flow Through ◽  
Gas Liquid Flow

Effects of Orifice Orientation and Gas-Liquid Flow Pattern on Initial Bubble Size

2013 ◽  
Vol 21 (11) ◽  
pp. 1206-1215 ◽  
Author(s):  
Changjun LIU ◽  
Bin LIANG ◽  
Shengwei TANG ◽  
Enze MIN
Keyword(s):  
Flow Pattern ◽  
Liquid Flow ◽  
Bubble Size ◽  
Gas Liquid Flow

scholarly journals Homogeneous and re-circulatory gas–liquid flow in a bubble column: A numerical investigation using OpenFOAM

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
Saroj K. Panda
Keyword(s):  
Liquid Flow ◽  
Bubble Size ◽  
Bubble Column ◽  
Cfd Model ◽  
Gas Velocity ◽  
Drag Forces ◽  
Circulatory Flow ◽  
Gas Liquid Flow ◽  
Lift And Drag ◽  
Superficial Gas Velocity

AbstractThis work presents the influence of the sparger opening area, gas velocity, and bubble size on hydrodynamics and transition of the flow regime from uniform to re-circulatory in a rectangular bubble column using OpenFOAM. In the course of development of the model, the effect of several drag closures and lift on the predictability of the CFD model was studied by comparing the predictions with published experimental results. Reynolds number-based drag closure was found to be suitable for uniform sparger whereas Tsuchiya drag (Tsuchiya et al. in Chem Eng Sci 52:3053–3066, 1997. https://doi.org/10.1016/S0009-2509(97)00127-9) was used to simulate gas–liquid flow for other spargers. Simulations were performed for seven different spargers with opening area 18–100% (superficial gas velocity of 2.9–5.8 cm/s) and bubble size of 2–8 mm. The smaller opening area and higher gas velocity promote the re-circulatory flow in the bubble column. Change in bubble size affects the hydrodynamics due to change in lift and drag forces.

scholarly journals Algorithms for determination of the vector velocity field in a two-phase gas-liquid flow

2020 ◽  
Vol 24 (6 Part A) ◽  
pp. 3569-3576
Author(s):  
Grzegorz Ligus ◽  
Maciej Masiukiewicz ◽  
Stanisław Anweiler ◽  
Marek Wasilewski
Keyword(s):  
Energy Efficiency ◽  
Velocity Field ◽  
Liquid Flow ◽  
Particle Image ◽  
Two Phase Flow ◽  
Qualitative Assessment ◽  
Phase Flow ◽  
Two Phase ◽  
Gas Liquid Flow

Energy efficiency is a key issue of sustainable development. During the design of industrial devices, it strives to achieve the highest possible energy efficiency. In the industrial systems, two-phase flow is a difficult task, especially the prediction, and maintenance of the two-phase flow regime. That is why this research proposes the evaluation and choice of an algorithm that will give a hint of the device design for which the hydrodynamic conditions of the two-phase mixture flow may be evalu-ated. The tests were carried out in a rectangular vertical narrow channel, as this type of device is in common use. The work aimed to show which algorithm is better for such evaluation. Parameters such as pressure drop, heat, mass, and momentum transfer are influenced by the phase velocity field. Still, various models are used for the determination of the velocity field. Therefore, there is a problem of choosing a model that will give the results closest to the real conditions. Flow visualization gives the non-invasive determination of the actual velocity field. An analysis of the velocity field was performed, which showed that for different two-phase flow regimes there are differences for given algorithms. The following algorithms were used to determine the velocity vector field: adaptive correlation method and adaptive particle image velocity method were used which are the parts of the general digital particle image velocimetry. The determination of the velocity fields in the quantitative and qualitative assessment of a given two-phase flow re-gime was obtained. The result of the research is the evaluation of algorithms for characterization two-phase gas-liquid flow.

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