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Motion of spherical particles in a Bingham plastic
Author(s) -
Ansley Ralph W.,
Smith Terence N.
Publication year - 1967
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690130629
Subject(s) - settling , laminar flow , reynolds number , mechanics , drag coefficient , turbulence , drag , bingham plastic , range (aeronautics) , spheres , classical mechanics , thermodynamics , materials science , physics , mathematics , rheology , composite material , astronomy
This paper describes an investigation of the settling characteristics of spherical particles in Bingham plastic fluids. A stress analysis is used to derive a nondimensional parameter which describes the laminar settling regime. The terminal velocities of spheres in the Reynolds number range of 2 to 130 have been determined. These, together with published data at higher Reynolds numbers, are shown to substantiate the theoretical argument. A correlation of drag coefficient as a function of the settling parameter indicates the transition from laminar to turbulent settling.