Abstract
We have studied the free rise of small air bubbles in aqueous solutions of xanthan gum and carboxymethylcellulose. The rheological behavior of the biopolymer solutions used in our experiments was thoroughly characterized. The terminal rise velocity of the bubbles was measured by imaging their motion with a high-speed video camera. The rise velocity increased as a power law in bubble volume for the smallest bubbles studied, as expected in the Stokes flow regime, but became approximately constant for larger bubbles. We observed no discontinuity in the rise velocity over the range of bubble volumes studied, from 1μl to 4000μl. The shape of the bubbles changed from spherical to cusped to spherical cap as the volume increased. While the smaller bubbles rose vertically through the polymer solutions, the larger bubbles rose in a spiral or zig-zag path.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
