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Compressive yield stress of flocculated suspensions: Determination via experiment
Author(s) -
Green Matthew D.,
Eberl Maria,
Landman Kerry A.
Publication year - 1996
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.690420820
Subject(s) - suspension (topology) , yield (engineering) , dewatering , compressive strength , centrifuge , work (physics) , measure (data warehouse) , particle (ecology) , colloid , materials science , stress (linguistics) , flocculation , biological system , process engineering , mathematics , computer science , composite material , mechanical engineering , engineering , chemical engineering , physics , geotechnical engineering , geology , linguistics , oceanography , philosophy , database , homotopy , nuclear physics , pure mathematics , biology
The compressive yield stress P y (ϕ) is an extremely useful parameter for the characterization of concentrated flocculated suspensions. It is a measure of the strength of inter‐particle bonds in a networked suspension structure and is used in process design and control of mineral colloidal suspension dewatering. Previous work developed a method for determining this compressive yield stress via the equilibrium sediment height technique using a centrifuge. Here justification for a simple approximate technique to obtain P y (ϕ) is discussed. A new more accurate iterative algorithm is also described. By generating synthetic data, where the exact P y (ϕ) is known, the accuracy of the two techniques can be evaluated properly for the first time. The relative merits and failings of the techniques are discussed. An example is given to show how these techniques work on real experimental data.