Stress propagation in a concentrated colloidal suspension under shear

  • N. S. Martys
  • M. Khalil
  • W. L. George
  • D. Lootens
  • P. Hébraud
Regular Article

DOI: 10.1140/epje/i2012-12020-3

Cite this article as:
Martys, N.S., Khalil, M., George, W.L. et al. Eur. Phys. J. E (2012) 35: 20. doi:10.1140/epje/i2012-12020-3

Abstract

The stress propagation in a concentrated attractive colloidal suspension under shear is studied using numerical simulations. The spatial correlations of the intercolloidal stress field are studied and an inertia-like tensor is defined in order to characterize the anisotropic nature of the stress field. It is shown that the colloids remain in a liquid order, the intercolloidal stress is strongly anisotropic. A transition under flow is observed: during a transient regime at low deformation, the stress propagates along the compression direction of the shear, whereas at larger deformations, the stress is organized into layers parallel to the (flow, vorticity) plane.

Keywords

Soft Matter: Colloids and Nanoparticles

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • N. S. Martys
    • 1
  • M. Khalil
    • 2
  • W. L. George
    • 1
  • D. Lootens
    • 3
  • P. Hébraud
    • 2
  1. 1.National Institute of Standards and TechnologyGaithersburgUSA
  2. 2.CNRSIPCMSStrasbourg CedexFrance
  3. 3.Sika Technology A.G.ZürichSwitzerland