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Hélène Politano
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Directeur de Recherche du CNRS
Contact
| Adresse : Laboratoire J.A.Dieudonné UMR CNRS-UNS N°7351 Université de Nice Sophia-Antipolis Parc Valrose 06108 NICE Cedex 2 |
Téléphone :
+33 (0)4 89 15 05 28 Fax : + 33 (0)4 93 51 79 74 Mail : helene.politano [at] unice [dot] fr |
Recherche
Domaines de Recherches (Research Interests)
- Mécanique des fluides (Fluid mechanics): turbulence hydrodynamique et magnétohydrodynamique (MHD) (hydro- and magneto-hydrodynamic turbulence), génération des champs magnétiques par effet dynamo (magnetic field generation by dynamo effect), écoulements anisotropes et transition à la turbulence d'ondes d'Alfvèn (anisotropic flows and transition to Alfvén wave turbulence), applications aux écoulements astrophysiques et géophysiques (applications to astrophysical and geophysical flows).
- Méthodes (Methods) : physique théorique (theoretical physics), phénoménologie (phenomenology), lois exactes (exact laws), modélisation mathématique (mathematical modelling), analyse asymptotique (asymptotic analysis), méthodes statistiques (statistical methods), méthodes spectrales (spectral methods), modélisation des écoulements (flow modelling), simulations numériques directes (DNS), simulation des grandes échelle (LES), comparaison avec des données observationnelles et expérimentales (comparison with observational and experimental data).
Curriculum Vitae
CV Enseignement (Teaching)
- Master 2 : Introduction à la turbulence (An introduction to turbulence) (Masters Omega, IMAG2E, MCS), UNS, (cours manuscrit en français)
- Ecole thématique "Processus physiques dans l’héliosphère et contraintes observationnelles", Cagèse 2008, Cours : Turbulence Hydro et MHD
- Ecole thématique "Advances in Geophysical and Astrophysical Turbulence", Cargèse 2016, Cours : Hydro & MagnetoHydroDynamics
- Master 2 : Introduction to MHD Turbulence (Master MCS), UNS
- Workshop GL 2017, S. Margherita di Pula (Sardinia), October 2017, Mini-cours : Anisotropic MHD & Alfvén Wave Turbulence
Production scientifique (Scientific output)
Publications
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Quelques publications (Some papers)
- Sturm-Liouville
description of the sine-Gordon soliton dynamics
- The
Dynamics of Freely Decaying Two-Dimensional Turbulence
- Inertial
Ranges and Resistive Instabilities in Two-Dimensional MHD
Turbulence
- Comparative
Study of Dissipation Modelling in Two-Dimensional MHD Turbulence
- Dynamical
isoperimeter pattern in the square sine-Gordon system
- Numerical
evidence of smooth self-similar dynamics for three-dimensional
ideal flows
- Instability
of strained vortex layers and vortex tube formation in
homogeneous turbulence
- Current
and vorticity dynamics in three-dimensional turbulence
- Model
of intermittency in Magnetohydrodynamic turbulence
- A
Sparse Mode Spectral Method for the Simulation of Turbulent
Flows
- Energy
release in a turbulent corona
- Dynamo
action in a Taylor-Green vortex near threshold
- Self-similar
decay laws for magnetohydrodynamics turbulence
- A
von Karman-Howarth equation for magnetohydrodynamic fluids and
its consequences on third-order longitudinal structure and
correlation functions
- Natural
length scales for structure functions in magnetized flows
- Determination
of anomalous exponents of structure functions in two-dimensional
magnetohydrodynamic turbulence
- Variable
intensity of Lagrangian chaos in the nonlinear dynamo problem
- Parametric
investigation of self-similar decay laws in MHD turbulent flows
- On
the validity of a non-local approach for MHD turbulence
- An
exact relationship for third-order structure functions in
helical flows
- Non-gaussian
probability distribution functions in two dimensional
magnetohydrodynamic turbulence
- Spiral
vortices in compressible flows
- Analysis
of cancellation in two-dimensional MHD turbulence
- Evidence
for weak MHD turbulence in the middle magnetosphere of Jupiter
- The
von Karman-Howarth relationship for helical MHD flows
- Simulation
of induction at low magnetic Prandtl number
- Topological
changes of the photospheric magnetic field inside active regions
: a prelude to flares ?
- Numerical
study of dynamo action at low magnetic Prandtl numbers
- Dynamo
regimes with a nonhelical forcing
- Dynamo
action at low magnetic Prandtl numbers: mean flow versus fully
turbulent motions
- Anisotropic
fluxes and nonlocal interactions in magnetohydrodynamic
turbulence
- Energy
decay in laws in strongly anisotropic magnetohydrodynamic
turbulence
- Spectral
modeling of turbulent flows and the role of helicity
- Anisotropic
turbulent model for solar coronal heating
- Development
of Anisotropy in Incompressible Magnetohydrodynamic Turbulence
- Spectral
Modeling of Magnetohydrodynamic Turbulent Flows
- Linear
and non linear features of the Taylor-Green Dynamo
- Spectral
Modeling of Rotating Turbulent Flows
- Depletion
of nonlinearity in magnetohydrodynamic turbulence: Insights from
analysis and simulations
Some Organisations of Workshops & Conferences
- Summer school Advances
in Geophysical and Astrophysical Turbulence, 2016
- EURO MHD 2008
- UK MHD Meeting 2004
