Importance of second-order wave generation for focused wave group run-up and overtopping
<br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Background: </strong>Focused wave groups offer a means for coastal engineers to determine extreme run-up and overtopping events.</br><br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextension...
| Main Authors: | , , , |
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| Format: | Journal article |
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Elsevier
2014
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| _version_ | 1797106332680060928 |
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| author | Orszaghova, J Taylor, P Borthwick, A Raby, A |
| author_facet | Orszaghova, J Taylor, P Borthwick, A Raby, A |
| author_sort | Orszaghova, J |
| collection | OXFORD |
| description | <br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Background: </strong>Focused wave groups offer a means for coastal engineers to determine extreme run-up and overtopping events.</br><br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Research purpose: </strong>This work examines numerically the importance of second-order accurate laboratory wave generation for New Wave-type focused wave groups generated by a piston-type paddle generator, and interacting with a plane beach and a seawall in a wave basin.</br><br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Methods: </strong>The numerical wave tank is based on the Boussinesq equations for non-breaking waves, and the non-linear shallow water equations for broken waves. During the model validation, good agreement is achieved between the numerical predictions and laboratory measurements of free surface elevation, run-up distances andovertopping volumes for the test cases driven by linear paddle signals. Errors in run-up distance and overtopping volume, arising from linear wave generation, are then assessed numerically by repeating the test cases using second-order accurate paddle signals.</br><br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Results: </strong>Focused wave groups generated using first-order wave-maker theory are found to be substantially contaminated by a preceding long error wave, resulting in erroneously enhanced run-up distances and overtoppingvolumes.</br><br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Conclusions: </strong>Thus, the use of second-order wave-maker theory for wave group run-up and overtopping experiments is instead recommended.</br> |
| first_indexed | 2024-03-07T07:00:16Z |
| format | Journal article |
| id | oxford-uuid:ff80e5c2-8708-433d-bbbb-a2908119f65a |
| institution | University of Oxford |
| last_indexed | 2024-03-07T07:00:16Z |
| publishDate | 2014 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:ff80e5c2-8708-433d-bbbb-a2908119f65a2022-03-27T13:45:26ZImportance of second-order wave generation for focused wave group run-up and overtoppingJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ff80e5c2-8708-433d-bbbb-a2908119f65aSymplectic Elements at OxfordElsevier2014Orszaghova, JTaylor, PBorthwick, ARaby, A<br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Background: </strong>Focused wave groups offer a means for coastal engineers to determine extreme run-up and overtopping events.</br><br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Research purpose: </strong>This work examines numerically the importance of second-order accurate laboratory wave generation for New Wave-type focused wave groups generated by a piston-type paddle generator, and interacting with a plane beach and a seawall in a wave basin.</br><br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Methods: </strong>The numerical wave tank is based on the Boussinesq equations for non-breaking waves, and the non-linear shallow water equations for broken waves. During the model validation, good agreement is achieved between the numerical predictions and laboratory measurements of free surface elevation, run-up distances andovertopping volumes for the test cases driven by linear paddle signals. Errors in run-up distance and overtopping volume, arising from linear wave generation, are then assessed numerically by repeating the test cases using second-order accurate paddle signals.</br><br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Results: </strong>Focused wave groups generated using first-order wave-maker theory are found to be substantially contaminated by a preceding long error wave, resulting in erroneously enhanced run-up distances and overtoppingvolumes.</br><br xmlns:etd="http://www.ouls.ox.ac.uk/ora/modsextensions"><strong>Conclusions: </strong>Thus, the use of second-order wave-maker theory for wave group run-up and overtopping experiments is instead recommended.</br> |
| spellingShingle | Orszaghova, J Taylor, P Borthwick, A Raby, A Importance of second-order wave generation for focused wave group run-up and overtopping |
| title | Importance of second-order wave generation for focused wave group run-up and overtopping |
| title_full | Importance of second-order wave generation for focused wave group run-up and overtopping |
| title_fullStr | Importance of second-order wave generation for focused wave group run-up and overtopping |
| title_full_unstemmed | Importance of second-order wave generation for focused wave group run-up and overtopping |
| title_short | Importance of second-order wave generation for focused wave group run-up and overtopping |
| title_sort | importance of second order wave generation for focused wave group run up and overtopping |
| work_keys_str_mv | AT orszaghovaj importanceofsecondorderwavegenerationforfocusedwavegrouprunupandovertopping AT taylorp importanceofsecondorderwavegenerationforfocusedwavegrouprunupandovertopping AT borthwicka importanceofsecondorderwavegenerationforfocusedwavegrouprunupandovertopping AT rabya importanceofsecondorderwavegenerationforfocusedwavegrouprunupandovertopping |