Comparison of Computational Fluid Dynamic Simulations with Experimental Jet Erosion Tests Results
Publication: Journal of Hydraulic Engineering
Volume 140, Issue 5
Abstract
The jet erosion test (JET) is an experimental device increasingly used to quantify the resistance of soils to erosion. This resistance is characterized by two geotechnical parameters: the critical shear stress and the erosion coefficient. A previously published JET interpretation model provides an estimation of these erosion parameters. But the existing model is simplified and semiempirical and several assumed hypotheses can be discussed. The aim of this study is to determine the relevance of the JET interpretation model. Therefore, a numerical model was developed that is able to predict the erosion of a cohesive soil by a turbulent flow. The numerical model was first validated on a benchmark: erosion of an erodible pipe by a laminar flow. The numerical results were satisfactorily compared with the theoretical solution. Then, three JETs were modeled numerically with values of erosion parameters obtained experimentally. A parametric study was also conducted to validate the accuracy of the numerical results and a good agreement was observed. The erosion parameters found experimentally permit the numerical prediction of the evolution of the erosion pattern within good accuracy. This result contributes to the validation of the JET’s semiempirical model. The numerical model also gives a complete description of the flow, including vortices which can be observed in the cavity created by erosion. The entire erosion pattern evolution was given by the numerical results. This numerical model gives information that is not available otherwise.
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Acknowledgments
This study benefited from the support of the Hydraulic Engineering Centre of EDF. The authors of this publication would like to express special thanks to Messrs Jean-Robert Courivaud (EDF) and Jean-Jacques Fry (EDF) for their support and confidence. This work was also funded by the French National Research Agency (ANR) through the COSINUS program (project CARPEINTER No. ANR-08-COSI-002).
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Published In
Journal of Hydraulic Engineering
Volume 140 • Issue 5 • May 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Sep 27, 2012
Accepted: Oct 3, 2013
Published online: Oct 5, 2013
Published in print: May 1, 2014
Discussion open until: Jul 14, 2014
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