SPH Simulation of Sediment Flushing Induced by a Rapid Water Flow
Publication: Journal of Hydraulic Engineering
Volume 138, Issue 3
Abstract
This paper shows an advanced application of the smoothed particle hydrodynamics (SPH) method to the numerical modeling of noncohesive sediment flushing aiming at the setup of a reliable engineering tool for the prediction of the coupled water-sediment dynamics at the bottom of an artificial reservoir. Both liquid and granular materials are modeled as weakly compressible viscous fluids, whose motion results from the numerical solution of the continuity and momentum equations discretized according to standard SPH formulation. The effect of two alternative erosion criteria on the description of the failure mechanism of bottom sediments is analyzed. These criteria are based, respectively, on Mohr-Coulomb yielding criterion and Shields theory. A sensitivity analysis is performed in order to assess, for both criteria, the influence of the model parameters on the simulation of the erosion process; the method is eventually validated by comparing numerical results with the experimental data obtained in a two-dimensional (2D) laboratory test.
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Acknowledgments
This work has been financed by the Research Fund for the Italian Electrical System under the Contract Agreement between RSE (formerly known as ERSE) and the Ministry of Economic Development—General Directorate for Nuclear Energy, Renewable Energy, and Energy Efficiency stipulated on July 29, 2009, in compliance with the decree of March 19, 2009.
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Information
Published In
Journal of Hydraulic Engineering
Volume 138 • Issue 3 • March 2012
Pages: 272 - 284
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jan 25, 2011
Accepted: Sep 26, 2011
Published online: Sep 28, 2011
Published in print: Mar 1, 2012
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