Centrifugal degassing of highly viscous Newtonian liquids

The movement of gas bubbles in a Newtonian liquid under centrifugal forces was considered. Taking into account wall effects and the increase of bubble diameter during the movement caused by pressure decrease, equations for th e bubble movement time in the case of entirely free and immobile bubble sur face were derived. Experiments on centrifuging air bubbles showed that in t he centrifuge the bubble retained a free surface even at much smaller diame ters than under gravity forces. A dimensionless bubble diameter was defined and its critical value above which bubbles behaved as free ones was evalua ted.