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Titel A method to calculate Finite-Time Lyapunov Exponents for inertial particles in incompressible flows
VerfasserIn D. Garaboa, V. Pérez-Muñuzuri
Medientyp Artikel
Sprache Englisch
ISSN 2198-5634
Digitales Dokument URL
Erschienen In: Nonlinear Processes in Geophysics Discussions ; 2, no. 4 ; Nr. 2, no. 4 (2015-07-14), S.989-1005
Datensatznummer 250115180
Publikation (Nr.) Volltext-Dokument vorhandencopernicus.org/npgd-2-989-2015.pdf
 
Zusammenfassung
The present study aims to improve the calculus of Finite-Time Lyapunov Exponents (iFTLEs) applied to describe the transport of inertial particles in a fluid flow. To this aim, the deformation tensor used to obtain the iFTLE is modified to take into account that the stretching rate between particles separated by a certain distance is influenced by the initial velocity of the particles. The advantages of this improvement, if compared to the standard method (Shadden et al., 2005), are discussed for the double-gyre flow and the meandering jet flow. The new method allows to identify the initial velocity that inertial particles must have in order to maximize their dispersion.
 
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