Sedimentation of a sphere along the axis of a long square duet filled with non-Newtonian liquids

Balaramakrishna, P. V. ; Chhabra, R. P. (1992) Sedimentation of a sphere along the axis of a long square duet filled with non-Newtonian liquids The Canadian Journal of Chemical Engineering, 70 (4). pp. 803-807. ISSN 0008-4034

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/cjce.54...

Related URL: http://dx.doi.org/10.1002/cjce.5450700427

Abstract

Based on extensive experimental results, it is shown that the retardation effect caused by the confining walls on the free settling velocity of a sphere is smaller with square walls than that with cylindrical boundaries. This is true for both Newtonian and power law fluids, provided the particle Reynolds number is small (< about 5). The values of the wall factor for Newtonian liquids are in excellent agreement with theory (up to R / L ≤ 0.1) while those for power law fluids have been correlated empirically via a linear relationship. The results reported here encompass the following ranges of conditions: 1 ≥ n ≥ 0.7; Re < 15 and 0.024 < R/L < 0.238.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
Keywords:Drag; Sphere; Wall Effects; Square Channel
ID Code:78653
Deposited On:20 Jan 2012 11:57
Last Modified:20 Jan 2012 11:57

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