(601d) Cfd Simulations of Low Concentration Particle Distribution in a Viscometer Cup Conference: AIChE Annual MeetingYear: 2006Proceeding: 2006 AIChE Annual MeetingGroup: North American Mixing ForumSession: Multiphase Mixing II: Solid-Liquid & Liquid-Liquid Mixing Time: Thursday, November 16, 2006 - 4:30pm-4:54pm Authors: Dasari, R. K., University of Louisville Berson, R. E., University of Louisville The rheological data of a two phase suspension shows a transition from shear thinning fluid to shear thickening fluid at a given shear rate when viscosity is measured using a rheometer with a vane geometry impeller. This phenomenon is observed to occur only for low solids concentration suspensions. We postulate that the settling of the solid particles at low shear could be a reason for this rheological behavior. Computational fluid dynamics (CFD) is used to investigate the distribution of solid particles in the suspension. Sawdust particles classified for a controlled size range is the material used in viscosity measurements. Eularian two-phase model is adopted with the k-e turbulence model to simulate the agitation of the particle suspension in the rheometer cup. Examination of particle suspension simulations over a range of rheometer vane shear rates is used to explain the rheological behavior of the suspension.