TRANSPORT CHARACTERISTICS OF SUSPENSIONS: PART IV. FRICTION LOSS OF CONCENTRATED-FLOCCULATED SUSPENSIONS IN TURBULENT FLOW

Journal Article · Tue May 01 04:00:00 EDT 1962 · A.I.Ch.E. Journal

DOI:https://doi.org/10.1002/aic.690080227· OSTI ID:4833849

Thomas, D G

Turbulent flow friction factors were determined for flocculated suspensions of thoria, kaolin, and titania in tubes 1/8- to 1-in. diameter. The non-Newtonian laminar flow data were arbitrarily fitted with the Bingham plastic model. With this model the range of yield stress values was 0.018 to 1.39 ft-lb/ ft/, with a maximum ratio of coefficient of rigidity to viscosity of suspending medium of 11.1. The volume fraction solids were varied from 0.042 to 0.23. Two types of behavior were observed depending on the value of the yield stress. For yield values less than 0.5 ft-lb/ft/ the turbulent fraction factors were always less than those for Newtonian fluids but tended to approach the Newtonian values as the Reynolds number was increased. For yield values greater than 0.5 ft-lb/ft/ sup 2/ the friction factors were again less than those for Newtonian fluids but tended to diverge from the Newtonian values as the Reynolds number was increased. Both sets of data were correlated with the Blasius relation with the coefficient and exponent given in terms of the laminar flow properties and the volume fraction solids. (auth)

• Research Organization: Cambridge Univ., Eng.
• NSA Number: NSA-16-017783
• OSTI ID: 4833849
• Journal Information: A.I.Ch.E. Journal, Journal Name: A.I.Ch.E. Journal Vol. Vol: 8
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM SILICATES
ENGINEERING AND EQUIPMENT
FLUID FLOW
FRICTION
STRESSES
SUSPENSIONS
THORIUM OXIDES
TITANIUM OXIDES
TRANSPORT
TURBULENCE
VISCOSITY