bubble absorber, swirl generator, bubble dynamics, visualisation
Experimental investigations have been carried out on a glass bubble absorber with swirl entry of air to visualize air bubble characteristics. Experiments are carried out in still, co-current and counter-current flow direction of the water. In bubble visualization studies, it was observed that the bubbles forms at the swirl generator surface, grows and detaches the swirl generator surface and moves upwards in water. Effect of air and water flow rate on the bubble detachment diameter was studied. Bubble detachment diameter always increases with air flow rate irrespective of water flow direction. Bubble diameter increases in counter-current flow of water, whereas it decreases in co-current flow of water.