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Proceedings in flow modelling in the surroundings of the end part of a trawl ArchiMer
Pichot, Geraldine.
This paper is devoted to the presentation of modelling procedures and of numerical simulations of the flow in the surroundings of the end part of a trawl, where fish are caught. We present first the hydrodynamical data collected in November 2004 at the IFREMER tank of Boulogne-sur-Mer around and inside an axisymmetric rigid net model. Then we show the use of averaged Navier-Stokes/Brinkman equations with an eddy viscosity coupled with an equation for the turbulent kinetic energy (TKE) (RANS type model of order one) as for a turbulent fluid model. Finally, we test this last model by comparing the numerical results obtained with the code that we have written in Freefem++ and the experimental data available.
Tipo: Text Palavras-chave: Fluids mechanics; Turbulence models; Fishing nets.
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00479/59098/61736.pdf
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Numerical simulation of water flow around a rigid fishing net ArchiMer
Lewandowski, Roger; Pichot, Geraldine.
This paper is devoted to the simulation of the flow around and inside a rigid axisymmetric net. We describe first how experimental data have been obtained. We show in detail the modelization. The model is based on a Reynolds Averaged Navier-Stokes turbulence model penalized by a term based on the Brinkman law. At the out-boundary of the computational box, we have used a "ghost" boundary condition. We show that the corresponding variational problem has a solution. Then the numerical scheme is given and the paper finishes with numerical simulations compared with the experimental data. (c) 2007 Elsevier B.V. All rights reserved.
Tipo: Text Palavras-chave: Fishing nets; Sobolev spaces; Variational formulations; Elliptic equations; Turbulence models; Fluid mechanics.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3424.pdf
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