Separation in time-dependent flow
separationintime00butt.pdf (2.415Mb)Abstract
The angular motion of separation points on a smooth cylinder
immersed in a sinusoidally oscillating flow has been determined
experimentally through the use of a U-shaped water tunnel, a special
differential pressure probe, and a data acquisition system. The results
have been compared with those obtained previously by Grass and
Kemp for a single amplitude of oscillation through the use of flow visualization.
The results have shown that the separation points undergo
large angular excursions during a given cycle, the degree of excursion
depending on the Reynolds number and the Keulegan-Carpenter number.
The separation data obtained in this exploratory investigation will
form the basis of future numerical analysis of oscillating flow about
cylinders.
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