BROWNIAN DYNAMICS SIMULATION FOR SUSPENSIONS OF OBLONG-PARTICLES UNDER SHEAR-FLOW

Computer simulations of the shear flow for the suspensions of oblong-p articles were performed using nonequilibrium Brownian Dynamics (BD). T he model particle is a rigid body made up of linearly connected sphere s with the interparticle potential of a repulsive Lennard-Jones potent ial. The length-over-width ratios of the oblong-particles used in the present calculations are 5/3 and 3. In the concentrated suspensions hi gh orientation is easily induced by shear at low shear rates. The syst ems of the oblong-particles exhibit the structural transition that cau ses the significant change in the rheological properties at high shear rates. Furthermore, the dependence of the length-over-width ratio of the particle is examined.