TRANSPORT CHARACTERISTICS OF SUSPENSIONS: III. LAMINAR-FLOW PROPERTIES OF FLOCCULATED SUSPENSIONS

Journal Article · Fri Sep 01 04:00:00 EDT 1961 · A.I.Ch.E. Journal

OSTI ID:4837504

Thomas, D G

The principal factors affecting the magnitude of the laminar-flow properties of flocculated suspensions were the concentration and particle diameter of the solid phase. The range of variables included concentrations from 0.02 to 0.23 volume fraction solids and particle sizes from 0.35 to 13 mu . Materials tested included thorium oxide, kaolin, titanium oxide, aluminum oxide, graphite, magnesium oxide, and uranium dioxide. At high rates of shear the data were fitted satisfactorily with the Bingham plastic model. The yield stress was directly proportional to the cube of the volume fraction solids and inversely proportional to the first or second power of the particle diameter, depending on the particle shape. The logarithm of the ratio of the coefficient of rigidity of the suspension to the viscosity of the suspending medium was directly proportional to the volume fraction solids over the complete range of concentrations studied. Although specific electrolytes (such as oxalate or pyrophosphate) deflocculated the suspensions even at low concentrations, the suspensions remained flocculated both in the presence of up to 0.1 M of 1: 1 electrolyte and over a pH range of 4 to 12. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• NSA Number: NSA-15-029368
• OSTI ID: 4837504
• Journal Information: A.I.Ch.E. Journal, Journal Name: A.I.Ch.E. Journal Vol. Vol: 7
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ALUMINUM OXIDES
ALUMINUM SILICATES
BINGHAM MATERIAL
CHEMICAL REACTIONS
CLAYS
COMPLEXES
CONFIGURATION
ELECTROLYTES
ENGINEERING AND EQUIPMENT
FLUID FLOW
GRAPHITE
KAOLIN
MAGNESIUM OXIDES
MATHEMATICS
OXALATES
PARTICLES
PHOSPHATES
QUANTITY RATIO
STANDARDS
STRESSES
SUSPENSIONS
THORIUM OXIDES
TITANIUM OXIDES
TURBULENCE
URANIUM OXIDES
UTAH
VELOCITY
VISCOSITY
VOLUME