In the present study, we conducted experimental observations on the CO2 bubble plume behaviors in the homogeneous and two-layer density stratified waters in the water tank. In the observational experiments, runs for different source discharging strengths and ambient water with homogeneous density and two layers density stratifications were executed and analyzed. The images of CO2 bubble plume were illuminated by two sets of halogen lamps. And the CCD (Charged- Coupled Detector) digital camera was used to grab the images. The digitized images of CO2 bubble plume were processed with the MPIV (Matlab Particle Image Velocimetry) software to yield the results of CO2 bubble plume velocity. The width and the intrusion length of bubble plume were also obtained by employing the digital image processing technique. Influences of the source strength and density stratification on the plume characteristics are investigated and presented.


The fossil power plants discharged into the atmosphere a huge of carbon dioxide waste air. As it is known, the carbon dioxide is the major of the cause of global warming. To reduce the green house effect of the earth, it is necessary to decrease the carbon dioxide in the atmosphere. Since our country, Taiwan, all of the fossil power plants are located beside the coastal region. It is a feasible way to collect the discharged carbon dioxide, and sequestrate it in the ocean water column. Study results of the behaviors of carbon dioxide discharge into the ocean will be helpful for conducting the carbon dioxide sequestration in the ocean. As a continuous stream of gas is injected into the interior of a liquid, the gas takes the form of bubbles which rises up owing to buoyancy and which impart an upward velocity to the surrounding liquid.

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