Factors Influencing the Measurement of the Yield Stress of Gels with a Sphere Rheometer.

Abstract

A forced vibration rheometer was developed to measure the viscoelastic properties of gelled hydrocarbons. In one form the instrument consists of a sphere which performs forced sinusoidal oscillations in the liquid to be investigated. The driving force is recorded as a function of amplitude and frequency. To evaluate the force on the sphere due to the viscous drag of the fluid, wall-, end-, and depth-effects as well as the nature of the surface of the sphere were studied. It was found that the observed force is particularly sensitive to the geometry of the instrument but relatively insensitive to the nature of the sphere. This work sheds light on the general applicability of existing sphere rheometers for the rheological characterization of non-Newtonian systems.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1970
Accession Number
AD0879722

Entities

People

  • Alan L. Woodman
  • Albert H. Lepie
  • Arnold Adicoff
  • Warren J. Murbach

Organizations

  • Naval Air Weapons Station China Lake

Tags

DTIC Thesaurus Topics

  • Amplitude
  • California
  • Chemical Compounds
  • Chemical Synthesis
  • Chemistry
  • Diameters
  • Export Controls
  • Frequency
  • Geometry
  • Government (Foreign)
  • Governments
  • Load Cells
  • Materials
  • Measurement
  • Rheology
  • Rheometers
  • Vibration

Readers

  • Fluid Dynamics.
  • Petroleum Engineering
  • Systems Analysis and Design