Please use this identifier to cite or link to this item:

Bottom-Discontinuous Riemann Solver for Modeling of Wave Overtopping

File Description Size Format  
2015-08-ms-wesley_r.pdf Version for non-UH users. Copying/Printing is not permitted 1.99 MB Adobe PDF View/Open
2015-08-ms-wesley_uh.pdf For UH users only 2.05 MB Adobe PDF View/Open

Item Summary

Title:Bottom-Discontinuous Riemann Solver for Modeling of Wave Overtopping
Authors:Wesley, Matthew
Date Issued:Aug 2015
Publisher:[Honolulu] : [University of Hawaii at Manoa], [August 2015]
Abstract:Depth-integrated numerical models represent an adequate and efficient method to describe near-shore processes including wave breaking. A limitation to these models is encountered as a wave overtops a vertical breakwater. The vertical flow structure cannot be recreated, leading to inaccurate results or numerical instabilities. The Riemann solver containing a bottom discontinuity presented by Murillo and Garcia-Navarro (2010; 2012, Journal of Computational Physics) may alleviate this limitation. In this study, a review of the Riemann solver and its incorporation into a one-dimensional second-order MUSCL-Hancock scheme are presented. The first series of validation tests mimics the Riemann problem with an emphasis on overtopping over a bottom discontinuity. The model results give good overall agreement to those from OpenFOAM (an open-source computational fluid dynamics code), but show underestimation of the downstream propagation speed when free fall of water is involved. A laboratory experiment was conducted in a 9.14 m long flume to provide validation data for solitary wave overtopping of a vertical breakwater. The numerical model shows slightly more reflection from the breakwater and underestimates the overtopping volume. Despite the discrepancies, the bottom-discontinuous Riemann solver performs reasonably well in approximating the overall processes given the simplicity of its formulation.
Description:M.S. University of Hawaii at Manoa 2015.
Includes bibliographical references.
Appears in Collections: M.S. - Ocean and Resources Engineering

Please email if you need this content in ADA-compliant format.

Items in ScholarSpace are protected by copyright, with all rights reserved, unless otherwise indicated.