316r Particle Migration in Stokes Flow of Suspensions past a Cylinder

Anugrah Singh, Chemical Engineering, Indian Institute of Technology, Guwahati, North Guwahati, Guwahati, India, Anurag Verma, Chemical Engineeering, Indian Institute of Technology, Guwahati, North Guwahati, Guwahati, India, and Prabhu R. Nott, Chemical Engineering, Indian Institute of Science, Bangalore, India.

Stokes flow of monodispersed, neutrally buoyant non-Brownian suspension of spherical particles over a cylinder has been investigated using Stokesian Dynamics and Suspension Balance Model. Stokesian Dynamic simulation was employed on a computational cell comprising of initially homogeneous distribution of particles around the cylinder with cylinder moving at a constant velocity . The Suspension Balance Model was implemented on a similar geometry and boundary conditions and solved using finite volume method. Results obtained from the two simulations appear to be qualitatively similar and in compliance with the theory of shear-induced particle migration. The particle phase distribution about the cylinder shows a decrease from upstream to downstream side. The observed anisotropy is present even at low concentration at which the expected normal stress differences are small.


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