Experimental and theoretical investigation of CO2 and air bubble rising velocity through kerosene and distilled water in bubble column

2018 ◽  
Vol 40 (1) ◽  
pp. 33-42 ◽  
Author(s):  
Sadra Mahmoudi ◽  
Bahram Hashemi Shahraki ◽  
Masoud Aghajani
Keyword(s):  
Theoretical Investigation ◽  
Bubble Column ◽  
Distilled Water ◽  
Air Bubble ◽  
Bubble Rising ◽  
Bubble Rising Velocity

Mixing of Matter by a Rising Bubble Near a Wall

2011 ◽  
Author(s):  
Toru Koso ◽  
Hiroyuki Iwashita ◽  
Fumihiko Usuki
Keyword(s):  
Large Scale ◽  
Uv Light ◽  
Fluid Motion ◽  
Turbulent Diffusion Coefficient ◽  
Air Bubble ◽  
Rising Bubble ◽  
Mass Dispersion ◽  
Mixing Patterns ◽  
Bubble Rising ◽  
Near Wall

The turbulent mixing of liquid mass caused by an air bubble rising near a wall in a still liquid in a pipe is investigated experimentally using a photochromic dye. A part of the liquid is activated by UV light and subjected to the fluid motion caused by a zigzag rising bubble of which Reynolds number is 214. The visualized mixing patterns showed that the dye is mixed by vortex motions in the bubble wake that is similar to the case of a bubble rising in the center of the pipe. The concentration distributions were deduced from the dye images using Lambert-Beer’s law and the turbulent diffusion coefficient (TDC) was evaluated from the temporal changes in the mass dispersion. The TDCs showed that a near-wall bubble generates stronger mixing than for a bubble in the center of the pipe. This stronger mixing can be attributed to the large-scale vortices observed for a near-wall bubble, which remains active for a longer time due to the lack of oppositely rotating vortices and mixes more fluids.

Effect of bed temperature on bubble size and bubble rising velocity in a semi-cylindrical slugging fluidized bed.

1990 ◽  
Vol 23 (6) ◽  
pp. 765-767 ◽  
Author(s):  
Yasuo Hatate ◽  
Kazuya Ijichi ◽  
Yoshimitsu Uemura ◽  
Mitsunobu Migita ◽  
Desmond F. King
Keyword(s):  
Fluidized Bed ◽  
Bubble Size ◽  
Bed Temperature ◽  
Bubble Rising ◽  
Bubble Rising Velocity

Investigation of single bubble rising velocity in LBE by transparent liquids similarity experiments

2018 ◽  
Vol 108 ◽  
pp. 204-213 ◽  
Author(s):  
Chaodong Zhang ◽  
Danna Zhou ◽  
Rongyuan Sa ◽  
Qingsheng Wu
Keyword(s):  
Single Bubble ◽  
Bubble Rising ◽  
Bubble Rising Velocity

Bubble Rising Velocity in Sodium Chloride Aqueous Solution under Horizontal DC High Magnetic Field

2008 ◽  
Author(s):  
Kazuhiko Iwai ◽  
Ippei Furuhashi ◽  
Michio Tokuyama ◽  
Irwin Oppenheim ◽  
Hideya Nishiyama
Keyword(s):  
Magnetic Field ◽  
Aqueous Solution ◽  
Sodium Chloride ◽  
High Magnetic Field ◽  
Bubble Rising ◽  
Bubble Rising Velocity

Simulation of Gas – Non-Newtonian Liquid Flow in a Rectangular Bubble Column by Considering Bubbles Interactions

2012 ◽  
Author(s):  
Erfan Niazi ◽  
Mehrzad Shams ◽  
Arash Elahi ◽  
Goodarz Ahmadi
Keyword(s):  
Liquid Flow ◽  
Bubble Column ◽  
Three Dimensional ◽  
Methyl Cellulose ◽  
Newtonian Liquid ◽  
Bubble Coalescence ◽  
Break Up ◽  
Bubble Rising ◽  
Momentum Coupling ◽  
Fluid Rheology

In this article a CFD model of a three-dimensional Eulerian-Lagrangian is developed for a gas - non-Newtonian liquid flow in a rectangular column. The model resolves the time-dependent, three-dimensional motion of gas bubbles in a liquid to simulate the trajectory of bubbles. Our model incorporates drag, gravity, buoyancy, lift, pressure gradient and virtual mass forces acting on a bubble rising in a liquid, and accounts for two-way momentum coupling between the phases. Population balance equation is solved to model bubble coalescence and break up. In bubble coalescence, Prince and Blanch model is used which can consider the effect of fluid rheology. Luo and Svendosen model was selected for bubble break up. The standard k-e turbulence model is selected for calculating turbulent flow properties. Power-law non-Newtonian liquid is selected for analysis of effect of different solutions of carboxy methyl cellulose in water. The effect of changing fluid to non-Newtonian is discussed in terms of velocity profile and gas hold up.

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