TABLE OF CONTENTS 



ABSTRACT • 1 



INTRODUCTION 1 



THEORETICAL SOLUTIONS 2 



DIMENSIONAL ANALYSIS 4 



PREVIOUS EXPERIMENTAL WORK 



Rate of Rise of Bubbles 6 



Wall Effect 7 



Cylindrical Bubbles 8 



SCOPE OF THE PRESENT INVESTIGATION 8 



EXPERIMENTATION 



Test Tanks 10 



Test Liquids 10 



Bubble Generation 12 



Determination of Bubble Size 12 



Other Experimental Techniques 13 



Motion Pictures and Their Evaluation 14 



RESULTS 



Terminal Velocity of Air Bubbles •• 17 



Wall- and Proximity Effects 17 



Nondimensional Presentation of Bubble Data 24 



Spherical Bubbles 24 



Ellipsoidal Bubbles 28 



Spherical Cap Bubbles 32 



Path of Bubbles , 32 



Bubbles in Filtered and Tap Water 37 



Effect of Surface-Active Substances 39 



Bubbles as Rigid Bodies • 41 



SUMMARY 42 



ACKNOWLEDGMENTS : 43 



REFERENCES 43 



APPENDIX - RATE OF RISE OF GAS BUBBLES IN DISTILLED WATER 47 



