Apparatus for determining the flow shear stress of suspensions i

Details Apparatus for determining the flow shear stress of suspensions i Apparatus for determining the flow shear stress of suspensions i

1983-05-11

1985-05-28

Ciarlante, Anthony V.

Measuring and testing

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

Viscosity

73 56, G01N 1104

Patent

active

045192391

ABSTRACT:
The invention concerns a measuring apparatus for checking and determining the flow shear stress of certain suspensions, principally blood, by a static or dynamic method and to thereby plot the viscosity of the suspension. The apparatus employs an internal measuring chamber comprised of a passage arrangement to simulate the natural microcirculation area wherein a network of capillary passages diverge from a main passage, with at least two of the capillary passages of different lengths, with a length ratio that can range from 3:1 to 15:1, with those capillaries connected to a source of variable pressure and extending past a detector unit.

REFERENCES:
patent: 3559464 (1971-02-01), Foust et al.
patent: 3908442 (1975-09-01), Chmiel
patent: 4143541 (1979-03-01), Ito et al.
J. J. Mills et al, A High Shear Rate, High Temperature Rheometer for Molten Glass. (Aug. 1970).
Neville, U.S. Defensive Publication, (Jul. 5, 1977).
Jean L. Leblance, Polymer Melt Flow Properties and Stress Relaxation Measurement with Slit Die Rheometer (1976).

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