Method and apparatus for measuring fluid viscosity
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United States of America Patent
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-
Jan 2, 1990
Grant Date -
N/A
app pub date -
Aug 22, 1988
filing date -
Aug 12, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transient flow capillary viscometer is provided for establishing a measure of the viscosity of a highly viscous test fluid. More particularly, a capillary tube filled with the test fluid is provided. The viscometer relies upon inducing a step change in the differential pressure across the ends of the capillary tube, which causes the fluid to flow therein. The resultant decrease in pressure drop as a function of time, i.e. the half-life of pressure decay, is monitored and provides an approximate measure indicative of the viscosity of the fluid.
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