Coherent vorticity extraction in resistive drift-wave turbulence: Comparison of orthogonal wavelets versus proper orthogonal decomposition
نویسندگان
چکیده
منابع مشابه
Coherent vorticity extraction in turbulent boundary layers using orthogonal wavelets
High-resolution data obtained by direct numerical simulation of turbulent boundary layers are analysed by means of orthogonal wavelets. The data, originally given on a Chebychev grid, are first interpolated onto an adapted dyadic grid. Then, they are decomposed using a wavelet basis, which accounts for the anisotropy of the flow by using different scales in the wall-normal direction and in the ...
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Two-dimensional resistive drift-wave turbulence is studied by high-resolution numerical simulations in the Iimit of small viscosity. Density and potential fluctuations are cross-coupled by resistive dissipation, proportional to the adiabaticity parameter, F, which determines the character of the system: adiabatic (ml) or hydrodynamic (Z% 1). Various cases are computed for 0. I ~%<5. Energy spec...
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We introduce improved reduced-order models for turbulent flows. These models are inspired from successful methodologies used in large eddy simulation, such as artificial viscosity, applied to standardmodels created by proper orthogonal decomposition of flows coupled with Galerkin projection. As a first step in the analysis and testing of our new methodology, we use the Burgers equation with a s...
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†Laboratoire de Météorologie Dynamique, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris cedex 05, France ‡Institut für Technische Chemie und Polymerchemie, Universität Karlsruhe (TH), Kaiserstr. 12, 76128 Karlsruhe, Germany §Laboratoire de Modélisation et Simulation Numérique en Mécanique, CNRS et Universités d’Aix-Marseille & CMI, Université de Provence, 39 rue Frédéric Joliot-Curie, 134...
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ژورنال
عنوان ژورنال: Comptes Rendus Physique
سال: 2011
ISSN: 1631-0705
DOI: 10.1016/j.crhy.2010.12.004