Method of measuring the interaction between walls and fluid
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United States of America Patent
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Feb 14, 1989
Grant Date -
N/A
app pub date -
Dec 5, 1986
filing date -
Dec 6, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of measuring the interaction of a fluid with a wall bounding the fluid which method includes placing tracer particles in the fluid, illuminating the particles, and measuring the movement of the particles by means of scattered light, the improvement wherein the step of illuminating comprises illuminating a region of the fluid adjacent the wall at a distance of less than about 1 micron from the wall with a light beam directed towards the interface of the fluid and the wall so that the light beam is completely reflected; and the step of measuring comprises recording the scattered light images resulting from the motion of the tracer particles in the region and evaluating the motion of the fluid adjacent the wall. The invention also describes an apparatus for practicing the novel method.
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