Method and apparatus for measuring fluid-fluid interfacial rheol

Details Method and apparatus for measuring fluid-fluid interfacial rheol Method and apparatus for measuring fluid-fluid interfacial rheol

1988-08-08

1989-12-05

Levy, Stewart J.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

G01N 1100

Patent

active

048844373

ABSTRACT:
This invention is a new, novel method and apparatus for the measurement of fluid-fluid interfacial shear viscosities. The method and apparatus are simple in design and conducive to routine measurements. The viscosities are measured by observation of the unsteady state deformation of the interface after a slowly rotating cylindrical cell containing the sample is abruptly halted. The deformation is established with tracer particles located at the interface between the two fluids in the sample. Correlations show the relationship of the traversed angle of the particles to the interfacial shear viscosity, the viscosities and densities of the bulk phases, and the sample dimensions. The method is sufficiently sensitive to allow measurements of interfacial shear viscosities ranging from 0.001 to 5.0 surface poise depending on cell geometry and liquid viscosity.

REFERENCES:
patent: 4425810 (1984-01-01), Simon et al.

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