Affiliation:
1. Synthesis and Solid State Pharmaceutical Centre (SSPC) University of Limerick Limerick Ireland
2. Bernal Institute and School of Engineering University of Limerick Limerick Ireland
3. Transport Phenomena Lab, Department of Chemical Engineering Delft University of Technology Delft The Netherlands
Abstract
AbstractWe carried out 3D simulations of monodisperse particle suspensions subjected to a constant shear rate with the view to investigate the effect of electrical double layers around the particles on apparent suspension viscosities. To this end, expressions for Debye length, zeta potential, and ionic strength (pH) of the liquid were incorporated into our in‐house lattice Boltzmann code that uses the immersed boundary method and includes subgrid lubrication models. We varied the solids concentration and particle radius, keeping the particle Reynolds number equal to 0.1. We report on results with respect to the effect of pH in the range 9 through 12 and of Debye length on apparent viscosity and spatial suspension structures, particularly at higher solids volume fractions, and on the effect of flow reversals.
Funder
Synthesis and Solid State Pharmaceutical Centre
Subject
General Chemical Engineering,Environmental Engineering,Biotechnology