Gerhard Nägele 2003 J. Phys.: Condens. Matter 15 S407 doi:10.1088/0953-8984/15/1/356
Gerhard Nägele
Show affiliationsWe examine linear viscoelastic, and translational and rotational diffusion properties of colloidal model dispersions. Theoretical results are discussed, in comparison with experiments, for monodisperse suspensions of charged and neutral colloidal spheres, and for binary dispersions of differently sized tracer and host particles. The theoretical methods employed comprise a mode-coupling scheme for Brownian particles, and a rooted cluster expansion scheme of tracer diffusion with two- and three-body hydrodynamic interactions included. We analyse in particular the validity of various empirical generalized Stokes–Einstein–Debye (SED) relations between the (dynamic) shear viscosity and translational/rotational diffusion coefficients. Some of these generalized SED relations are basic to microrheological measurements aimed at characterizing the viscoelasticity of complex fluids on the basis of the diffusional properties of immersed tracer particles.
83.60.Bc Linear viscoelasticity
82.70.Kj Emulsions and suspensions
83.60.Fg Shear rate dependent viscosity
Issue 1 (15 January 2003)
Received 11 October 2002
Published 16 December 2002
Gerhard Nägele 2003 J. Phys.: Condens. Matter 15 S407
Urs Schreiber JHEP05(2004)027
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