Abstract :
In this paper, numerical simulations are employed to study the orientation
behavior of a dilute suspension of Brownian rigid disklike particles in a simple shear flow. Also,
the viscoelasticity of such a suspension is analyzed by considering the stress budget of the
two-phase material. A direct Monte-Carlo simulator as well as the moment approximation approaches
with two different closure models are used to produce the data. Results are compared by available
experimental and analytical data, and a very good agreement is established. After the validation of
the simulators, the results are presented and discussed. Different Pʹeclet numbers and shape
factors of particles are considered and their effects on various quantities are presented, e.g.
particle orientations in space, viscous
and elastic contributions to the non-Newtonian stress tensor, etc.
