 |
| Titel |
A method to calculate finite-time Lyapunov exponents for inertial particles in incompressible flows |
| VerfasserIn |
D. Garaboa-Paz, V. Pérez-Muñuzuri |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 22, no. 5 ; Nr. 22, no. 5 (2015-10-05), S.571-577 |
| Datensatznummer |
250121000
|
| Publikation (Nr.) |
 copernicus.org/npg-22-571-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| The present study aims to improve the calculus of finite-time Lyapunov
exponents (FTLEs) applied to describe the transport of inertial particles in
a fluid flow. To this aim, the deformation tensor 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. Thus, the
inertial FTLEs (iFTLEs) are defined in terms of the maximum stretching
between infinitesimally close trajectories that have different initial
velocities. 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 one to identify the initial
velocity that inertial particles must have in order to maximize their
dispersion. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|