Start
Jul 21, 2010 - 15:00
End
Jul 21, 2010 - 16:30
Venue
Creativity Hall (Room No. 118)
Event Type
Speaker
Dr. Anugrah Singh Department of Chemical Engineering Indian Institute of Technology Guwahati
Title
Dynamics of suspension of anisometric particles in bounded flow
Abstract: Suspensions of non-spherical particles such as fibers rods spheroids plates are commonly used in the material processing industries. The rheological properties of such suspension are influenced by the dynamics and orientation of the suspended particles which is affected by the hydrodynamic interactions. We present the Stokesian Dynamics simulation to study the dynamics of the suspension of anisometric particles by carrying out bounded simulation in homogeneous shear and pressure driven flow. The particles consisted of rigid spheres connected together by strong inter-particle forces. The simulation method was validated by comparing the period of rotation of a single rigid particle with that of the period of Jeffery’s orbit of a spheroid of equivalent aspect ratio. The boundary walls have significant effect on the orientation and dynamics of these particles. Besides determining the shear and normal stresses we have also studied the velocity and concentration profiles in simple shear as well as pressure driven flow in a channel.About the Speaker: Anugrah Singh is currently an Associate Professor in IIT Guwahati. He completed is PhD from IISc in 2000. He worked in Fluent Inc (Currently known as Ansys) for close to three years. He then spent an year at Technion University Israel before joining IITG. His main research interests are in Computational and Experimental Fluid Dynamics.