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Medientyp:
E-Artikel
Titel:
CIRCULATION KINEMATICS IN NONLINEAR LABORATORY WAVES
Beteiligte:
Kim, Tae-in;
Hudspeth, Robert T.;
Sulisz, W.
Erschienen:
Coastal Engineering Research Council, 1986
Erschienen in:
Coastal Engineering Proceedings (1986) 20, Seite 30
Sprache:
Ohne Angabe
DOI:
10.9753/icce.v20.30
ISSN:
2156-1028;
0589-087X
Entstehung:
Anmerkungen:
Beschreibung:
A weakly nonlinear solution is presented for the two-dimensional wave kinematics forced by a generic wavemaker of variable-draft. The solution is valid for both piston and hinged wavemakers of variable draft that may be double articulated. The second-order propagating waves generated by a planar wave board are composed of two components; viz., a Stokes second-order wave and a second-harmonic wave forced by the wavemaker which travels at a different speed. A previously neglected time-independent solution that is required to satisfy a kinematic boundary condition on the wavemaker as well as a mixed boundary condition on the free surface is included for the first time. A component of the time-independent solution is found to accurately estimate the mean return current (correct to second-order) in a closed wave flume. This mean return current is usually estimated from kinematic considerations by a conservation of mass principle.