Particulate flow simulation using Lattice Boltzmann Method: A Theological study

摘要

This work deals with calculating Theological properties of a suspension of particles in a fluid. A suspension of mono- and poly-disperse circular particles in shear flow is studied using two different methods for application of shear force: (a) by placing parallel walls at the top and bottom of the domain which are moving in opposite directions with the same velocity, and (b) using the Lees-Edwards boundary condition. The system which starts moving from rest, is allowed to reach a statistically steady state. Rheolog-ical properties namely, bulks shear stress, effective viscosity and normal stress difference of the suspension at different particle-based Reynolds numbers and different mean particle area fractions are calculated. Furthermore, the effect of size distribution on the relative effective viscosity of the suspension is investigated. Comparison of the present results with empirical formulations found in the literature shows reasonable agreement.