 |
| Titel |
Coherent Lagrangian vortices in three-dimensional unsteady flows |
| VerfasserIn |
Daniel Blazevski, George Haller |
| Konferenz |
EGU General Assembly 2014
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250093085
|
| Publikation (Nr.) |
 EGU/EGU2014-7480.pdf |
|
|
|
|
|
| Zusammenfassung |
| Detecting barriers to, and facilitators of, transport is a fundamental problem in studying the behavior of Lagrangian trajectories in a fluid. A recent extension of two-dimensional results provides transport barriers in 3D flows as locally most attracting, repelling or shearing surfaces. This provides an objective definition of a Lagrangian vortex boundary as an outermost member of a family of most shearing cylindrical material surfaces. The detection of such a 3D vortex boundary yields an accurate estimate on the volume the vortex transports. We compute 3D Lagrangian vortices in kinematic models, and also use a global circulation model to extract sharp boundaries for coherent three-dimensional Agulhas rings in the South Atlantic. |
|
|
|
|
|
|