Motion of a Viscoelastic Micellar Fluid Around a Cylinder: Flow and Fracture

Details Motion of a Viscoelastic Micellar Fluid Around a Cylinder: Flow and Fracture Motion of a Viscoelastic Micellar Fluid Around a Cylinder: Flow and Fracture

2006-05-25

arxiv.org/abs/cond-mat/0605640v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages 6 figures

Scientific paper

10.1103/PhysRevLett.98.224501

We present an experimental study of the motion of a viscoelastic micellar material around a moving cylinder, which ranges in response from fluid-like flow to solid-like tearing and fracture, depending on the cylinder radius and velocity. The observation of viscoelastic crack propagation driven by the cylinder indicates an extremely low tear strength, approximately equal to the steady state surface tension of the fluid. At the highest speeds a driven crack is observed in front of the cylinder, propagating with a fluctuating speed equal on average to the cylinder speed, here as low as 5% of the elastic wave speed in the medium.

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