A spatio-temporal study of rheo-oscillations in a sheared lamellar phase using ultrasound.

@article{Manneville2004ASS,
  title={A spatio-temporal study of rheo-oscillations in a sheared lamellar phase using ultrasound.},
  author={S{\'e}bastien Manneville and J. B. Salmon and A Colin},
  journal={The European physical journal. E, Soft matter},
  year={2004},
  volume={13 2},
  pages={197-212}
}
We present an experimental study of the flow dynamics of a lamellar phase sheared in the Couette geometry. High-frequency ultrasonic pulses at 36 MHz are used to measure time-resolved velocity profiles. Oscillations of the viscosity occur in the vicinity of a shear-induced transition between a high-viscosity disordered fluid and a low-viscosity ordered fluid. The phase coexistence shows up as shear bands on the velocity profiles. We show that the dynamics of the rheological data result from two… CONTINUE READING