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| Titel |
Bore Soliton Splash |
| VerfasserIn |
Onno Bokhove, Elena Gagarina, Anthony Thornton, Jaap van der Vegt, Wout Zweers |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250050005
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| Zusammenfassung |
| We review the experiment of a bore soliton splash [1]. In a long water filled channel, two
solitons are generated by sudden opening of a sluice gate, which holds back a finite amount
of water at a higher level. At the far end the channel linearly converges from both sides,
forming a narrowing V-shape, when viewed from above. The first soliton quickly develops a
jump/bore, and crashes in this contracting part of the channel. This first wave reflects from
the convergence with a limited increase in the water level at the convergence, and then draws
a trough in which the unbroken second soliton crashes. That results into a 3-4m
high vertical jet, but only when initial water levels in the canal and sluice gate are
finely tuned: 0.41m versus 0.9m. The jet is absent when the canal level is raised to
0.43m.
The combination of dispersion and nonlinearity in experiments such as the above one led
to the development of a new water wave model [2], as well as conservative numerical
techniques [3]. Both the model and its numerical counterpart are based on variational
techniques. One key issue is the inclusion of dispersion as well as local wave breaking in
jumps into one single model. Another issue is the modeling of the vertical splash. We also
describe our preliminary (numerical) modeling attempts of the bore soliton splash to
date.
References
[1] Google Bore soliton splash YouTube.
[2] C. Cotter and O. Bokhove 2010: Water wave model with accurate dispersion and
vertical vorticity. Peregrine Commemorative Issue. J. Eng. Maths. 67, 33–54.
[3] V.R. Ambati 2008: Forecasting water waves and currents: a space-time approach.
Ph.D. Thesis, University of Twente, The Netherlands. |
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