The structure of colloidal suspensions under shear flow: Light scattering experiments

  • C. Mathis
  • G. Bossis
  • J. F. Brasy
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 76)


The structure of a colloidal suspension under shear flow is investigated by light diffusion. The suspension, made of latex spheres (2a=750 Å) dispersed in a water and glycerol mixture, is in a liquid like state. We record the structure factor S(k) in the plane of shear for Peclet numbers (Pe=ya 2/D) lower than 10−1. The structure factor presents an asymetrical deformation when increasing the shear rate: we observe both angular and amplitude shifts of the maximum of S(k); moreover, it depends on the side (compression side or dilatation side of S(k). These results are compared with a linear approximation and numerical results. This comparison shows that the relevant parameter is Pe*=Pe.r*, where r* is an effective radius derived from the interparticle potential.

Key words

Colloidal suspension shear flow structure light scattering interacting particles 


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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1988

Authors and Affiliations

  • C. Mathis
    • 1
  • G. Bossis
    • 1
  • J. F. Brasy
    • 2
  1. 1.Laboratoire de Physique de la Matière CondenséeUniversité de NiceNice CedexFrance
  2. 2.Department of Chemical EngineeringCalifornia Institute of TechnologyPasadenaU.S.A.

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