Plane Impulse Waves in Reservoirs
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 132, Issue 5
Abstract
The characteristics of impulse waves generated in reservoirs by the impact of variable density mass flows were assessed using two-dimensional model experimentation. Particle image velocimetry (PIV) was applied within the wave generation area at the slide impact location and the water wave profiles were measured by seven successive capacitance wave gages. The maximum relative wave amplitude and the normalized wave amplitude of the propagating wave train were correlated with the dimensionless slide quantities and the relative propagation distance, respectively. The impact Froude number was identified as the dominant parameter for slow impacting slides, whereas the water depth and the slide thickness governed the maximum possible wave amplitude for large impact Froude numbers. Four wave types were distinguished due to three different levels of wave nonlinearity associated with variable impact Froude numbers, relative slide densities, and characteristic slide geometries: nonlinear transient bore, transition wave, oscillatory wave, and nonbreaking solitary wave. Moreover, the density effect on the wave generation process was investigated with small impact Froude numbers using sequential PIV velocity vector fields.
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Acknowledgments
This research was supported by the Swiss National Science Foundation, Grant No. NSF-CH2100-059285.99. Acknowledgments go to Dr. H.M. Fritz, presently Georgia Institute of Technology, United States, for generously providing original research material developed during his stay at VAW.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 132 • Issue 5 • September 2006
Pages: 358 - 368
Copyright
© 2006 ASCE.
History
Received: Jul 16, 2004
Accepted: Nov 8, 2005
Published online: Sep 1, 2006
Published in print: Sep 2006
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