Our aim is to obtain a simple, efficient model to describe the temporal evolution of the probability (PDF) to measure a given concentration of a passive tracer advected by a turbulent flow. This is of wide interest for environmental, industrial and geophysical applications. We present a phenomenological model based on a self-convolution process that mimic the effect of turbulent cascades. The model, as well as the underlying hypothesis are discussed and tested by laboratory experiments.
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Séminaire d’équipe
Un modèle pour le mélange
Antoine Venaille 03/2008
