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Drag on chains and agglomerates of spheres in viscous newtonian and power law fluids
Author(s) -
Chhabra R. P.,
Singh Tushar,
Nandrajog S.
Publication year - 1995
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450730417
Subject(s) - spheres , drag , settling , power law , newtonian fluid , non newtonian fluid , planar , mechanics , drag coefficient , physics , agglomerate , classical mechanics , materials science , law , thermodynamics , mathematics , composite material , computer science , statistics , computer graphics (images) , astronomy , political science
Abstract New experimental data on the free settling velocity of straight chains (up to twenty spheres) and planar clusters of touching spheres in Newionian and power law media are reported. The results embrace the following ranges of conditions: 0.65 ≤ n ≤ 1; Re < ‐ 2.5 and 1.22 < m < 48.87 Pa·s n . The straight chain drag measurements are in line with theoretical predictions for Newtonian fluids. The present results in power law fluids seem to suggest that it is possible to express the drag on a straight chain of spheres in terms of that on a single sphere of equal volume. Limited results with planar clusters are satisfactorily correlated using a volume equivalent sphere diameter.