LONGSHORE CURRENT INSTABILITIES: GROWTH TO FINITE AMPLITUDE

Proceedings of the International Conference on Coastal Engineering

Edward B. Thornton²  Nicholas Dodd¹ 

[1] Institute for Marine and Atmospheric Research, Utrecht University;Oceanography Department, Naval Postgraduate School

关键词: current instability;    longshore current;    current;    finite amplitude;   

DOI  :  10.9753/icce.v23.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

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.

【 授权许可】

Unknown