Observation of Droplet Size Oscillations in a Two-Phase Fluid under Shear Flow

Details Observation of Droplet Size Oscillations in a Two-Phase Fluid under Shear Flow Observation of Droplet Size Oscillations in a Two-Phase Fluid under Shear Flow

2003-03-12

arxiv.org/abs/cond-mat/0303225v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevLett.92.018305

Experimental observations of droplet size sustained oscillations are reported in a two-phase flow between a lamellar and a sponge phase. Under shear flow, this system presents two different steady states made of monodisperse multilamellar droplets, separated by a shear-thinning transition. At low and high shear rates, the droplet size results from a balance between surface tension and viscous stress whereas for intermediate shear rates, it becomes a periodic function of time. A possible mechanism for such kind of oscillations is discussed.

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