This work analyses the dynamic response of a sphere located close to the floor of an hydraulic channel within steady free-surface current flows. The sphere is free to move in transverse (y) and streamwise (x) directions and it is characterized by a mass ratio, m*, equal to 1.34. The oscillation amplitudes and the frequencies of the sphere have been measured by means of the image analysis of a Charge Coupled Device (CCD) camera. The experimental data show a significant influence of the free surface on the sphere movement and highlight a different behaviour of the dynamic response to the increasing of the water level on the upper part of the body.

Dynamic Response of a Sphere Immersed in a Shallow Water Flow

MIRAUDA, DOMENICA;
2014-01-01

Abstract

This work analyses the dynamic response of a sphere located close to the floor of an hydraulic channel within steady free-surface current flows. The sphere is free to move in transverse (y) and streamwise (x) directions and it is characterized by a mass ratio, m*, equal to 1.34. The oscillation amplitudes and the frequencies of the sphere have been measured by means of the image analysis of a Charge Coupled Device (CCD) camera. The experimental data show a significant influence of the free surface on the sphere movement and highlight a different behaviour of the dynamic response to the increasing of the water level on the upper part of the body.
2014
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/80491
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