Rheological behavior of a suspension of randomly oriented rods
Falling-ball rheometry is used to study a suspension (volume fraction solids = 0.05) of large, neutrally buoyant rods (length = 3.175 cm, diameter = 0.154 cm) in a viscous Newtonian liquid. We find that all sizes of balls studied (0.65 cm less than or equal to diameter less than or equal to 1.90 cm) experience the same continuum that is characterized by a single viscosity which we have measured to be 2.41 times greater than that of the pure suspending liquid. The viscosity increase due to the presence of the rods is over 12 times greater than that observed for a suspension of uniform spheres having the same volume fraction. The results are free of any flow induced clustering and orientation effects and are in reasonable agreement with theoretical predictions for randomly oriented rods.
- Research Organization:
- Los Alamos National Laboratory, WX-4, Los Alamos, New Mexico 87545
- DOE Contract Number:
- W-7405-ENG-36; AC04-76DP00789
- OSTI ID:
- 6813097
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 50:3; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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