Abstract
ACADEMIC and practical interest in the generation and motion of gas bubbles rising through liquid media have resulted in many theoretical and experimental investigations of the associated phenomena. Most experimental results concern time-displacement data of bubbles of various sizes and shapes rising through media of different physical characteristics. Since the bubble reaches a terminal velocity when the drag force is numerically equal to the buoyant force, greater elucidation, of the nature of the factors which determine the drag force has been the object of most of the data analyses. In an evaluation of the motion, it is expedient to consider the drag coefficient which is denned by: where CD is the drag coefficient, U the terminal velocity of the bubble and A the projected area of the equivalent sphere of radius re This expression reduces to :
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MAGARVEY, R., CORKUM, P. The Wake of a Rising Bubble. Nature 200, 354–355 (1963). https://doi.org/10.1038/200354a0
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DOI: https://doi.org/10.1038/200354a0
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