Coagulation cascade of surface plumes in viscoelastic rimming flow
Department of Physics of Complex Systems, The Weizmann Institute of Science - Rehovot 76100, Israel
Accepted: 29 August 2011
We report the experimental observation of Kolmogorov-type steady coagulation cascade in an elastically driven instability occurring at the liquid front of a dilute polymer solution partially filling a rotating horizontal drum. Surface plumes are found to dominate the flow in the vicinity of the front at low Reynolds numbers. Plume merging leads to an area cascade with a time-independent mass flux. The coalescence process results in a power-law decay of the stationary plume area distribution, with an exponent which agrees with that of the Smoluchowski coagulation model.
PACS: 89.75.Da – Systems obeying scaling laws / 89.75.Fb – Structures and organization in complex systems
© EPLA, 2011