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Lagrangian or not Lagrangian?
Jean-Olivier Irisson, Serge Planes, Michel de Lara
University of Perpignan
irisson@normalesup.org(Abstract received 04/28/2005 for session A)
ABSTRACT
Tracking passive or active biological particules does not have the same requirements. Lagragian tracking is an efficient way of representing the complex mouvement of passive particules (planctonic organisms for example) advected in a changing current regime. When dealing with active organisms, such as fishes larvae, the problem is made even more complex by the behaviour of the animal. Indeed this very behaviour can be sufficiently important on a spatial scale to entrain the particule away from the passive trajectory. We elaborated a model of the pelagic phase of coral reef fishes which accounts for the behaviour of the larvae. The current advection scheme is outragiously simple but the first results obtained seem promissing. In this talk I will present this model with special focus on the differences with a Lagrangian model of the same kind of process in order to underline the avantages and the drawbacks of each method.
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2005 LAPCOD Meeting, Lerici, Italy, June 13-17, 2005