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A visual study of pulp floc dispersion mechanisms
Author(s) -
Lee C. W.,
Brodkey R. S.
Publication year - 1987
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.690330216
Subject(s) - turbulence , dispersion (optics) , mechanics , pulp (tooth) , softwood , materials science , composite material , petroleum engineering , optics , geology , physics , medicine , pathology
The dispersion of artificially produced softwood pulp flocs in controlled, plane, turbulent Couette flow was studied by using both monocular and stereoscopic film techniques. The mechanisms of controlled floc formation and of dispersion are proposed. For the latter, two mechanisms were observed, one global that involves deformation, breaking, and fragmentation, and one local that involves surfac erosion. The effect of the flow field stress level on the time and rate of dispersion is presented.