The oscillatory motion of rising bubbles in wormlike micellar fluids with different microstructures was investigated. Two types of oscillations were observed in different concentration ranges, each with its own temperature dependence. Steady rheology experiments to identify the fluid microstate were performed and it was found that transitions in the equilibrium structure match transitions in the bubble dynamics. The results show that wormlike micellar fluids are the most generic complex fluids as far as rising bubbles are concerned, since all known material-dependent dynamics can occur at different temperatures and concentrations.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)