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Updated: Jul 30, 2025

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
Published on: August 26, 2019
The behavior of standing waves near the end of an open pipe with low mean flow
Thomas R Moore1, Makayle S Kellison1, Whitney L Coyle1
1Department of Physics, Rollins College, Winter Park, Florida 32789, USAtmoore@rollins.edu, mkellison@rollins.edu, wcoyle@rollins.edu.
Abstract:
The acoustic standing wave near the end of an open pipe is investigated using spectrally analyzed high-speed transmission electronic speckle pattern interferometry. It is shown that the standing wave extends beyond the open end of the pipe and the amplitude decays exponentially with distance from the end. Additionally, a pressure node is observed near the end of the pipe in a position that is not spatially periodic with the other nodes in the standing wave. A sinusoidal fit to the amplitude of the standing wave inside the pipe indicates that the end correction is well predicted by current theory.
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