Turbulent structures in cylindrical density currents in a rotating frame of reference
| Autor: | Enzo A. Dari, Jorge Salinas, Thomas Bonometti, Mariano Ignacio Cantero |
|---|---|
| Přispěvatelé: | Comisión Nacional de Energía Atómica - CNEA (ARGENTINA), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Consejo Nacional de Investigaciones Científicas y Técnicas - CONICET (ARGENTINA), Institut de Mécanique des Fluides de Toulouse - IMFT (Toulouse, France), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Gravity (chemistry)
010504 meteorology & atmospheric sciences Mécanique des fluides Ciencias Físicas Computational Mechanics Direct numerical simulation General Physics and Astronomy 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics High Energy Physics::Theory General Relativity and Quantum Cosmology 0103 physical sciences DIRECT NUMERICAL SIMULATION TURBULENT FLOWS 0105 earth and related environmental sciences Physics Física de los Fluidos y Plasma Turbulence Mechanics Condensed Matter Physics Rotating reference frame Action (physics) Mechanics of Materials GRAVITY CURRENTS CIENCIAS NATURALES Y EXACTAS ROTATION EFFECTS |
| Popis: | Gravity currents are flows generated by the action of gravity on fluids with different densities. In some geophysical applications, modeling such flows makes it necessary to account for rotating effects, modifying the dynamics of the flow. While previous works on rotating stratified flows focused on currents of large Coriolis number, the present work focuses on flows with small Coriolis numbers (i.e. moderate-to-large Rossby numbers). In this work, cylindrical rotating gravity currents are investigated by means of highly resolved simulations. A brief analysis of the mean flow evolution to the final state is presented to provide a complete picture of the flow dynamics. The numerical results, showing the well-known oscillatory behavior of the flow (inertial waves) and a final state lens shape (geostrophic adjustment), are in good agreement with experimental observations and theoretical models. The turbulent structures in the flow are visualized and described using, among others, a stereoscopic visualization and videos as supplementary material. In particular, the structure of the lobes and clefts at the front of the current is presented in association to local turbulent structures. In rotating gravity currents, the vortices observed at the lobes front are not of hairpin type but are rather of Kelvin-Helmholtz type. Fil: Salinas, Jorge Sebastián. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina Fil: Cantero, Mariano Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina Fil: Dari, Enzo Alberto. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina Fil: Bonometti, Thomas. Universite de Toulose - Le Mirail; Francia. Centre National de la Recherche Scientifique; Francia |
| Databáze: | OpenAIRE |
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