الفهرس 
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Abstract
Bubbly flow is involved in many branches of engineering processes connected with mass transfer and heat transfer operations. The present work deals with the movement of gas bubbles in both quiescent and disturbed liquids.
Analysis f the effects of geometric parameters of the air bubble and the bubble terminal properties on its upward movement in liquids is considered for two physical frames. The first is presented in the study of forces acting on the bubble during its formation and the other frame concerns the forces influencing the bubble free movement in quiescent liquids. The oscillating and deformed single gas bubble is found to experience two fashions of motion, the periodic movement and the random rocking. The theoretical analysis for forces is carried out based exclusively upon this supposition which is experimentally confirmed.
Photographing technique, using single He-Ne laser beam to determine the bubble size, and Phase/Doppler Particle Analyzer (P/DPA) are utilized in order to perform the experimental investigations. The study is concerned with the range of bubble Reynolds number between 300.