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2002 LAPCOD Meeting
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Material transport in the presence of wave-structures
Andy Reynolds
Silsoe Research Institute
andy.reynolds@bbsrc.ac.uk(Abstract received 09/25/2002 for session B)
ABSTRACT
A Lagrangian stochastic model for material transport in the presence of wave-structures is presented. Simulated particle trajectories tend to be cycloidal. Velocity fluctuations aligned with the axis of the wave-structures are shown to be characterized by a non-oscillatory Lagrangian velocity autocorrelation function having a 'knee'(secondary maxima). Orthogonal velocities are characterized by an oscillatory Lagrangian velocity autocorrelation function having pronounced negative lobes. The coexistence of such distinct Lagrangian velocity autocorrelation functions together with the occurrence of cycloidal trajectories is the hallmark of Lagrangian data obtained from floats in the Equatorial Pacific Ocean. The chirality of trajectories, which can be determined from Lagrangian data, is shown to be key parameter.
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2002 LAPCOD Meeting, Key Largo, Florida, December 12-16, 2000