Microfluidic rheology of soft colloids above and below jamming

K. N. Nordstrom; E. Verneuil; P. E. Arratia; A. Basu; Z. Zhang; A. G. Yodh; J. P. Gollub; D. J. Durian

doi:10.1103/PhysRevLett.105.175701

Microfluidic rheology of soft colloids above and below jamming

K. N. Nordstrom, E. Verneuil, P. E. Arratia, A. Basu, Z. Zhang, A. G. Yodh, J. P. Gollub, D. J. Durian

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168 Citations (Scopus)

Abstract

The rheology near jamming of a suspension of soft colloidal spheres is studied using a custom microfluidic rheometer that provides the stress versus strain rate over many decades. We find non-Newtonian behavior below the jamming concentration and yield-stress behavior above it. The data may be collapsed onto two branches with critical scaling exponents that agree with expectations based on Hertzian contacts and viscous drag. These results support the conclusion that jamming is similar to a critical phase transition, but with interaction-dependent exponents.

Original language	English
Article number	175701
Journal	Physical Review Letters
Volume	105
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.105.175701
Publication status	Published - 21 Oct 2010
Externally published	Yes

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AU - Verneuil, E.

AU - Arratia, P. E.

AU - Basu, A.

AU - Zhang, Z.

AU - Yodh, A. G.

AU - Gollub, J. P.

AU - Durian, D. J.

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AB - The rheology near jamming of a suspension of soft colloidal spheres is studied using a custom microfluidic rheometer that provides the stress versus strain rate over many decades. We find non-Newtonian behavior below the jamming concentration and yield-stress behavior above it. The data may be collapsed onto two branches with critical scaling exponents that agree with expectations based on Hertzian contacts and viscous drag. These results support the conclusion that jamming is similar to a critical phase transition, but with interaction-dependent exponents.

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Microfluidic rheology of soft colloids above and below jamming

Abstract

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