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Article
Microfluidic Rheology of Soft Colloids above and below Jamming
Departmental Papers (MEAM)
  • Kerstin N. Nordstrom, University of Pennsylvania
  • Paulo E Arratia, University of Pennsylvania
  • E. Verneuil, University of Pennsylvania
  • Anindita Basu, University of Pennsylvania
  • Zheng Zhang, University of Pennsylvania
  • Arjun G. Yodh, University of Pennsylvania
  • Jerry P. Gollub, University of Pennsylvania
  • Douglas J. Durian, University of Pennsylvania
Document Type
Journal Article
Date of this Version
10-21-2010
Comments

Copyright American Physical Society. Reprinted from Physical Review Letters, Volume 105, Issue 17, Article 175701, October 2010, 4 pages.

Publisher URL: http://prl.aps.org/pdf/PRL/v105/i17/e175701

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.

Citation Information
Kerstin N. Nordstrom, Paulo E Arratia, E. Verneuil, Anindita Basu, et al.. "Microfluidic Rheology of Soft Colloids above and below Jamming" (2010)
Available at: http://works.bepress.com/douglas_durian/11/