Wall effects for motion of spheres in power-law fluids

Clicks: 173
ID: 272354
2001
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Abstract
The steady motion of spheres representing particles inside tubes filled with different fluids has been investigated using both a finite-element and a finite-volume method. The rheology of the fluids has been modelled by the power-law able to describe the shear-thinning (pseudoplastic) behaviour of a series of polymer solutions. New results have been obtained for a series of tube/sphere diameter ratios in order to investigate the wall effects on the drag exerted by the fluid on the sphere. The results agree well with previous simulations for an unbounded medium (infinite diameter ratio). Experimental investigations have also been carried out and simulated, and the results compare favourably with the experiments. The present simulations revealed the convergence of the drag coefficient to a constant value independent of tube-to-sphere diameter ratio when the power-law index approaches zero.
Reference Key
chhabra2001journalwall Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors K.A Missirlis,D Assimacopoulos,E Mitsoulis,R.P Chhabra;K.A Missirlis;D Assimacopoulos;E Mitsoulis;R.P Chhabra;
Journal journal of non-newtonian fluid mechanics
Year 2001
DOI
10.1016/s0377-0257(00)00189-0
URL
https://sciprofiles.com/publication/view/0f1f6aa8f58d65af319d5f2c5921d0c5
Keywords
power-law model finite-volume method non-orthogonal grid flow around a sphere drag coefficient

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