On the molecular mechanism behind the bubble rise velocity jump discontinuity in viscoelastic liquids
Dieter Bothe,
Matthias Niethammer,
Christian Pilz
et al.
Abstract:Bubbles rising in viscoelastic liquids may exhibit a jump discontinuity of the rise velocity as a critical bubble volume is exceeded. The phenomenon has been extensively investigated in the literature, both by means of experiments as well as via numerical simulations. The occurrence of the velocity jump has been associated with a change of the bubble shape under the formation of a pointed tip at the rear end and to the appearance of a so-called negative wake with the liquid velocity behind the bubble, pointing… Show more
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