Rheology of Concentrated Suspensions of Fibers in Tube Flow: III. Suspensions with the Same Fiber Length Distribution
Abstract
Capillary viscometer measurements were made on a series of concentrated suspensions with the same fiber length distribution. Shear stress- shear rate data are reported for 0, 15, and 30 vol.% glass fiber suspensions in 100, 600, and 1000 P silicone oil. Yield stresses, wall effects, concentration defects, squeeze-through, and capillary entrance exclusion were not significant in the measurements. With other parameters held constant, the suspension viscosity increased with oil viscosity. The data were fit by a dimensionless plot of the form F(fRe,De) = 0 where f is the friction factor for tube flow and Re and De are the Reynolds and Deborah numbers of the system. The suspension viscosity increased with fiber concentration, but the magnitude of the increase was highly shear rate dependent. The data are compared with literature predictions for the dependence of suspension viscosity on fiber concentration and shear rate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1974
- Accession Number
- ADA005777
Entities
People
- Christopher T. Hill
- Richard O. Maschmeyer
Organizations
- Monsanto