Analysis of the EMD behavior for separating coherent structure from interference fluctuations in homogeneous isotropic turbulence

Abstract : Empirical mode decomposition (EMD) is a method that relevant to decompose nonlinear and nonstationary time series into a sum of intrinsic modes functions (IMFs) and a low frequency trend. Here for the first time we used Bivariate EMD to separate large scale convection from turbulent velocity field. First a synthetic perturbation that mimics coherent structure is added to an experimental homogeneous isotropic turbulent field then the EMD was applied as a filter bank to separate this fluctuation from the initial field. The performance of the method has been evaluated by comparing turbulent properties of the recovered signal and ones without addition of fluctuations.
Type de document :
Communication dans un congrès
iTi Conference on Turbulence, Sep 2014, Darmstadt, Germany
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https://hal.inria.fr/hal-01103045
Contributeur : Karim Abed-Meraim <>
Soumis le : mardi 13 janvier 2015 - 22:10:58
Dernière modification le : lundi 16 juillet 2018 - 16:01:41

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  • HAL Id : hal-01103045, version 1

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Mehdi Sadeghi, Fabrice Foucher, Karim Abed-Meraim, Christine Mounaïm-Rousselle. Analysis of the EMD behavior for separating coherent structure from interference fluctuations in homogeneous isotropic turbulence. iTi Conference on Turbulence, Sep 2014, Darmstadt, Germany. 〈hal-01103045〉

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