RT journal article
T1 Higher order dynamic mode decomposition of an experimental trailing vortex
A1 Gutierrez-Castillo, P.
A1 Garrido-Martin, M.
A1 Bölle, T.
A1 García Ortiz, José Hermenegildo
A1 Aguilar-Cabello, J.
A1 del Pino, C.
A2 Ingeniería Mecánica y Diseño Industrial
AB The decay of trailing vortices is a fundamental problem in fluid mechanics and constitutes the basis of control applications that intend toalleviate the wake hazard. In order to progress, we use the recently developed modal-decomposition technique to identify the governingdynamics in an experimental trailing vortex. A particular emphasis is on the difficulty and usefulness of applying such tools to noisy experi-mental data. We conducted a water-tunnel experiment at a chord-based Reynolds number Re ¼ 4   104 using stereoscopic particle imagevelocimetry measurements over a downstream range of 36 chords. The downstream evolution of the maximum of vorticity suggests that thewhole wake can be partitioned into three consecutive regimes. A higher-order dynamic mode decomposition of the streamwise vorticity ineach such part of the wake shows that the decay is well approximated by at most three modes. Additionally, our study provides evidence forthe existence of several instabilities after the vortex roll up beyond about 6.5 chords.
PB AIP Publishing
SN 1089-7666
YR 2022
FD 2022-10
LK http://hdl.handle.net/10498/28731
UL http://hdl.handle.net/10498/28731
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026