Inertial Particle Dynamics in a Hurricane
Name
Sapsis-2009-Inertial Particle Dy.pdf
Size
3.04 MB
Format
Adobe PDF
Checksum (MD5)
5a8d07d7110a2f34afc60638d6dbb8cb
Author(s)
Sapsis, Themistoklis
Haller, George
Date Issued
August 2009
Journal
Journal of the Atmospheric Sciences
Publisher
American Meteorological Society
Citation
Sapsis, Themistoklis, and George Haller. “Inertial Particle Dynamics in a Hurricane.” Journal of the Atmospheric Sciences (2009): 2481-2492. © 2010 American Meteorological Society
Version
Final published version
Abstract
The motion of inertial (i.e., finite-size) particles is analyzed in a three-dimensional unsteady simulation of Hurricane Isabel. As established recently, the long-term dynamics of inertial particles in a fluid is governed by a reduced-order inertial equation, obtained as a small perturbation of passive fluid advection on a globally attracting slow manifold in the phase space of particle motions. Use of the inertial equation enables the visualization of three-dimensional inertial Lagrangian coherent structures (ILCS) on the slow manifold. These ILCS govern the asymptotic behavior of finite-size particles within a hurricane. A comparison of the attracting ILCS with conventional Eulerian fields reveals the Lagrangian footprint of the hurricane eyewall and of a large rainband. By contrast, repelling ILCS within the eye region admit a more complex geometry that cannot be compared directly with Eulerian features.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1175/2009jas2865.1
