Claude Basdevant - Academia.edu (original) (raw)

Papers by Claude Basdevant

Research paper thumbnail of Une méthode multiniveau pour la simulation des grandes échelles des écoulements turbulents compressibles

Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy, 2000

ABSTRACT

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Research paper thumbnail of Méthode des ondelettes mobiles. (Travelling wavelets method)

Comptes Rendus de l Académie des Sciences - Series I - Mathematics

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Research paper thumbnail of Simulation and Modelling of a Laminar Separation Bubble on Airfoils

IUTAM Bookseries, 2009

A high-resolved Large Eddy Simulation (LES) of the flow around an airfoil near stall has been ach... more A high-resolved Large Eddy Simulation (LES) of the flow around an airfoil near stall has been achieved. We have observed that the laminar boundary layer undergoes a quick transition to turbulence in a Laminar Separation Bubble (LSB) close to the leading edge of the airfoil profile. The flow structures in this transitional flow region have been analysed and the transition

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Research paper thumbnail of Numerical resolution of the burgers equation using the wavelet transform

Lecture Notes in Physics, 1990

Without Abstract

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Research paper thumbnail of A Study of Barotropic Model Flows: Intermittency, Waves and Predictability

Journal of The Atmospheric Sciences, 1981

The régime flows corresponding to the barotropic nondivergent equation with forcing, drag and sub... more The régime flows corresponding to the barotropic nondivergent equation with forcing, drag and subgrid-scale dissipation are studied using spectral model on the plane and on the sphere. The flow régimes obtained exhibit clear evidence of the existence of an enstrophy-cascading inertial range, together with a reverse energy cascade toward small wavenumbers. It is shown, however, that the enstrophy cascade is

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Research paper thumbnail of Stratéole: A project to study antarctic polar vortex dynamics and its impact on ozone chemistry

Physics and Chemistry of the Earth, 1995

The STRATÉOLE experiment is designed to study the wintertime Antarctic lower stratosphere polar v... more The STRATÉOLE experiment is designed to study the wintertime Antarctic lower stratosphere polar vortex and its springtime breakdown. To this end, it is planned to fly a large number (around 200) of long-lived (3 months), small isopycnic drifting balloons instrumented with temperature and pressure sensors, GPS and transmitters. The main goal of STRATÉOLE experiment is to provide an unprecedented documentation

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Research paper thumbnail of Dynamics of the Antarctic lower stratosphere observed during the Vorcore campaign

In September and October 2005 27 superpressure balloons SPB were launched from McMurdo 167 E 78 S... more In September and October 2005 27 superpressure balloons SPB were launched from McMurdo 167 E 78 S a station in Antarctica SPBs are able to drift for months in the lower stratosphere at a constant density level The mean flight duration is greater than 2 months and the longest flight lasted 109 days More than 150000 meteorological measurements were made

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Research paper thumbnail of Zonal RANS/LES coupling simulation of a transitional and separated flow around an airfoil near stall

Theoretical and Computational Fluid Dynamics, 2008

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Research paper thumbnail of Nonlinear galerkin method and subgrid-scale model for two-dimensional turbulent flows

Theoretical and Computational Fluid Dynamics, 1992

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Research paper thumbnail of Reconstructing balloon trajectories in the tropical stratosphere with a hybrid model using analysed fields

Quarterly Journal of the Royal Meteorological Society, 2001

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Research paper thumbnail of Large eddy simulations of aero-optical effects in a turbulent boundary layer

Journal of Turbulence, 2003

Curved flows observed in aeronautical reversing systemsare studied using large eddy simulation(LE... more Curved flows observed in aeronautical reversing systemsare studied using large eddy simulation(LES).To estimate the prediction capabilities of LES, acurved mixing layer is first simulated. The major effect of curvature is to decrease the level of turbulent fluctuations, a decrease that is followed by an overshoot of fluctuations whenthe flow relaxes further downstream. These observations agree well with previous experimental investigations

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Research paper thumbnail of Subgrid-Scale Modeling of Enstrophy Transfer in Two-Dimensional Turbulence

Journal of the Atmospheric Sciences, 1978

A method of parameterization of the energy and enstropy transfers involving subgrid scales is pro... more A method of parameterization of the energy and enstropy transfers involving subgrid scales is proposed in order to predict the time evolution of the energy spectrum at larger scales. The method is based on the strong non-localness of enstrophy transfer within the enstrophy inertial range of turbulence in two dimensions. It is applied first to a master equation derived from

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Research paper thumbnail of Air mass motion, temperature, and humidity over the Arabian Sea and western Indian Ocean during the INDOEX intensive phase, as obtained from a set of superpressure drifting balloons

Journal of Geophysical Research, 2002

During the Indian Ocean Experiment (INDOEX) Intensive Field Phase, 17 superpressure balloons drif... more During the Indian Ocean Experiment (INDOEX) Intensive Field Phase, 17 superpressure balloons drifting at lower tropospheric levels were launched from Goa to sample the motion and meteorological characteristics of polluted air masses originating from the Indian subcontinent. The mass flow, as expected, is attracted to the Intertropical Convergence Zone (ITCZ), which is reached in about 7 days. Successive trajectories show

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Research paper thumbnail of A study of the dynamics of the equatorial lower stratosphere by use of ultra-long-duration balloons: 1. Planetary scales

Journal of Geophysical Research, 2001

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Research paper thumbnail of A Lagrangian study of the Antarctic polar vortex

Journal of Geophysical Research, 1997

We study the dynamics of passively advected tracers in the Antarctic polar vortex, using the wind... more We study the dynamics of passively advected tracers in the Antarctic polar vortex, using the wind fields provided by the European Centre for Medium-Range Weather Forecasts' (ECMWF) analysis from August to October 1993. Advection on both isopycnal (0.0938kg/m3) and isentropic surfaces (470°K) is considered. A new definition of the vortex edge, identified as the maximum of kinetic energy, is compared

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Research paper thumbnail of Intermodal energy transfers in a proper orthogonal decomposition–Galerkin representation of a turbulent separated flow

Journal of Fluid Mechanics, 2003

Energy transfers between modes obtained from the proper orthogonal decomposition (POD) of a turbu... more Energy transfers between modes obtained from the proper orthogonal decomposition (POD) of a turbulent flow past a backward-facing step are analysed with the aim of providing guidelines for modelling unresolved modes in truncated POD Galerkin models. It is observed that energy transfers are local in the POD basis, and that the Fourier-decomposition-based concepts of forward and backward energy cascades are

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Research paper thumbnail of A Multilevel Algorithm for Large-Eddy Simulation of Turbulent Compressible Flows

Journal of Computational Physics, 2001

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Research paper thumbnail of Calibrated reduced-order POD-Galerkin system for fluid flow modelling

Journal of Computational Physics, 2005

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Research paper thumbnail of Stratéole/Vorcore—Long-duration, Superpressure Balloons to Study the Antarctic Lower Stratosphere during the 2005 Winter

Journal of Atmospheric and Oceanic Technology, 2007

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Research paper thumbnail of Quasi-Lagrangian measurements in the lower stratosphere reveal an energy peak associated with near-inertial waves

Geophysical Research Letters, 2002

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Research paper thumbnail of Une méthode multiniveau pour la simulation des grandes échelles des écoulements turbulents compressibles

Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy, 2000

ABSTRACT

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Research paper thumbnail of Méthode des ondelettes mobiles. (Travelling wavelets method)

Comptes Rendus de l Académie des Sciences - Series I - Mathematics

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Simulation and Modelling of a Laminar Separation Bubble on Airfoils

IUTAM Bookseries, 2009

A high-resolved Large Eddy Simulation (LES) of the flow around an airfoil near stall has been ach... more A high-resolved Large Eddy Simulation (LES) of the flow around an airfoil near stall has been achieved. We have observed that the laminar boundary layer undergoes a quick transition to turbulence in a Laminar Separation Bubble (LSB) close to the leading edge of the airfoil profile. The flow structures in this transitional flow region have been analysed and the transition

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Numerical resolution of the burgers equation using the wavelet transform

Lecture Notes in Physics, 1990

Without Abstract

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Research paper thumbnail of A Study of Barotropic Model Flows: Intermittency, Waves and Predictability

Journal of The Atmospheric Sciences, 1981

The régime flows corresponding to the barotropic nondivergent equation with forcing, drag and sub... more The régime flows corresponding to the barotropic nondivergent equation with forcing, drag and subgrid-scale dissipation are studied using spectral model on the plane and on the sphere. The flow régimes obtained exhibit clear evidence of the existence of an enstrophy-cascading inertial range, together with a reverse energy cascade toward small wavenumbers. It is shown, however, that the enstrophy cascade is

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Stratéole: A project to study antarctic polar vortex dynamics and its impact on ozone chemistry

Physics and Chemistry of the Earth, 1995

The STRATÉOLE experiment is designed to study the wintertime Antarctic lower stratosphere polar v... more The STRATÉOLE experiment is designed to study the wintertime Antarctic lower stratosphere polar vortex and its springtime breakdown. To this end, it is planned to fly a large number (around 200) of long-lived (3 months), small isopycnic drifting balloons instrumented with temperature and pressure sensors, GPS and transmitters. The main goal of STRATÉOLE experiment is to provide an unprecedented documentation

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Research paper thumbnail of Dynamics of the Antarctic lower stratosphere observed during the Vorcore campaign

In September and October 2005 27 superpressure balloons SPB were launched from McMurdo 167 E 78 S... more In September and October 2005 27 superpressure balloons SPB were launched from McMurdo 167 E 78 S a station in Antarctica SPBs are able to drift for months in the lower stratosphere at a constant density level The mean flight duration is greater than 2 months and the longest flight lasted 109 days More than 150000 meteorological measurements were made

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Research paper thumbnail of Zonal RANS/LES coupling simulation of a transitional and separated flow around an airfoil near stall

Theoretical and Computational Fluid Dynamics, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Nonlinear galerkin method and subgrid-scale model for two-dimensional turbulent flows

Theoretical and Computational Fluid Dynamics, 1992

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Research paper thumbnail of Reconstructing balloon trajectories in the tropical stratosphere with a hybrid model using analysed fields

Quarterly Journal of the Royal Meteorological Society, 2001

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Large eddy simulations of aero-optical effects in a turbulent boundary layer

Journal of Turbulence, 2003

Curved flows observed in aeronautical reversing systemsare studied using large eddy simulation(LE... more Curved flows observed in aeronautical reversing systemsare studied using large eddy simulation(LES).To estimate the prediction capabilities of LES, acurved mixing layer is first simulated. The major effect of curvature is to decrease the level of turbulent fluctuations, a decrease that is followed by an overshoot of fluctuations whenthe flow relaxes further downstream. These observations agree well with previous experimental investigations

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Subgrid-Scale Modeling of Enstrophy Transfer in Two-Dimensional Turbulence

Journal of the Atmospheric Sciences, 1978

A method of parameterization of the energy and enstropy transfers involving subgrid scales is pro... more A method of parameterization of the energy and enstropy transfers involving subgrid scales is proposed in order to predict the time evolution of the energy spectrum at larger scales. The method is based on the strong non-localness of enstrophy transfer within the enstrophy inertial range of turbulence in two dimensions. It is applied first to a master equation derived from

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Air mass motion, temperature, and humidity over the Arabian Sea and western Indian Ocean during the INDOEX intensive phase, as obtained from a set of superpressure drifting balloons

Journal of Geophysical Research, 2002

During the Indian Ocean Experiment (INDOEX) Intensive Field Phase, 17 superpressure balloons drif... more During the Indian Ocean Experiment (INDOEX) Intensive Field Phase, 17 superpressure balloons drifting at lower tropospheric levels were launched from Goa to sample the motion and meteorological characteristics of polluted air masses originating from the Indian subcontinent. The mass flow, as expected, is attracted to the Intertropical Convergence Zone (ITCZ), which is reached in about 7 days. Successive trajectories show

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A study of the dynamics of the equatorial lower stratosphere by use of ultra-long-duration balloons: 1. Planetary scales

Journal of Geophysical Research, 2001

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Lagrangian study of the Antarctic polar vortex

Journal of Geophysical Research, 1997

We study the dynamics of passively advected tracers in the Antarctic polar vortex, using the wind... more We study the dynamics of passively advected tracers in the Antarctic polar vortex, using the wind fields provided by the European Centre for Medium-Range Weather Forecasts' (ECMWF) analysis from August to October 1993. Advection on both isopycnal (0.0938kg/m3) and isentropic surfaces (470°K) is considered. A new definition of the vortex edge, identified as the maximum of kinetic energy, is compared

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Intermodal energy transfers in a proper orthogonal decomposition–Galerkin representation of a turbulent separated flow

Journal of Fluid Mechanics, 2003

Energy transfers between modes obtained from the proper orthogonal decomposition (POD) of a turbu... more Energy transfers between modes obtained from the proper orthogonal decomposition (POD) of a turbulent flow past a backward-facing step are analysed with the aim of providing guidelines for modelling unresolved modes in truncated POD Galerkin models. It is observed that energy transfers are local in the POD basis, and that the Fourier-decomposition-based concepts of forward and backward energy cascades are

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Multilevel Algorithm for Large-Eddy Simulation of Turbulent Compressible Flows

Journal of Computational Physics, 2001

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Research paper thumbnail of Calibrated reduced-order POD-Galerkin system for fluid flow modelling

Journal of Computational Physics, 2005

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Research paper thumbnail of Stratéole/Vorcore—Long-duration, Superpressure Balloons to Study the Antarctic Lower Stratosphere during the 2005 Winter

Journal of Atmospheric and Oceanic Technology, 2007

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Research paper thumbnail of Quasi-Lagrangian measurements in the lower stratosphere reveal an energy peak associated with near-inertial waves

Geophysical Research Letters, 2002

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