Two models of the flow over and through an immersed, vegetated layer are examined to study the onset of instability waves across the layer and to assess the effect of mild variations in the mean flow and in the drag force exerted by the canopy onto the frequency and growth rate of the monami instability. One of the two models, based on the use of Darcy’s equation, with a tensorial permeability, within the canopy is more robust than the other (which uses a scalar drag coefficient), i.e., it is less sensitive to the inevitable imperfections or approximations in the input data.
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Research Article| December 16 2016
Drag-model sensitivity of Kelvin-Helmholtz waves in canopy flows
Nicola Luminari ;
Christophe Airiau ;
Nicola Luminari, Christophe Airiau, Alessandro Bottaro; Drag-model sensitivity of Kelvin-Helmholtz waves in canopy flows. Physics of Fluids 1 December 2016; 28 (12): 124103. https://doi.org/10.1063/1.4971789
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