LONGSHORE CURRENT INSTABILITIES: GROWTH TO FINITE AMPLITUDE

Nicholas Dodd; Edward B. Thornton

doi:10.9753/icce.v23.%p

Núm. 23 (1992), Conference Proceedings

Núm. 23 (1992)

LONGSHORE CURRENT INSTABILITIES: GROWTH TO FINITE AMPLITUDE

Conference Proceedings

Publicado 1992-01-29

Nicholas Dodd⁺⁻
Edward B. Thornton⁺⁻

Nicholas Dodd

Institute for Marine and Atmospheric Research, Utrecht University

Edward B. Thornton

Oceanography Department, Naval Postgraduate School

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current instability
longshore current
current
finite amplitude

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LONGSHORE CURRENT INSTABILITIES: GROWTH TO FINITE AMPLITUDE. (1992). Coastal Engineering Proceedings, 1(23). https://doi.org/10.9753/icce.v23.%p

Resumen

The growth of shear instabilities in the longshore current to finite amplitude is studied. It is shown, by considering near-critical conditions and the selfinteraction of the fastest growing mode (FGM), that the basic flow is supercritical and that, therefore, the disturbance may be expected to evolve to a finite size, with frequency equal to that predicted by linear stability theory, and final amplitude proportional to the linear growth rate. This is consistent with observation. The mean flow may therefore also be expected to evolve to a new form.

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Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.

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LONGSHORE CURRENT INSTABILITIES: GROWTH TO FINITE AMPLITUDE

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