RT Journal Article
T1 Higher order dynamic mode decomposition of an experimental trailing vortex
A1 Gutiérrez-Castillo, Paloma
A1 Garrido-Martín, Manuel
A1 Bölle, Tobias
A1 García-Ortiz, José Hermenegildo
A1 Aguilar-Cabello, Jorge
A1 Del-Pino-Peñas, Carlos Manuel
K1 Mecánica de fluidos
AB The decay of trailing vortices is a fundamental problem in fluid mechanics and constitutes the basis of control applications that intend to alleviate the wake hazard. In order to progress, we use the recently developed modal-decomposition technique to identify the governing dynamics in an experimental trailing vortex. A particular emphasis is on the difficulty and usefulness of applying such tools to noisy experimental data. We conducted a water-tunnel experiment at a chord-based Reynolds number Re ¼ 4  104 using stereoscopic particle image velocimetry measurements over a downstream range of 36 chords. The downstream evolution of the maximum of vorticity suggests that the whole wake can be partitioned into three consecutive regimes. A higher-order dynamic mode decomposition of the streamwise vorticity in each such part of the wake shows that the decay is well approximated by at most three modes. Additionally, our study provides evidence for the existence of several instabilities after the vortex roll up beyond about 6.5 chords
PB AIP
YR 2022
FD 2022-10-27
LK https://hdl.handle.net/10630/25792
UL https://hdl.handle.net/10630/25792
LA eng
NO P. Gutierrez-Castillo, M. Garrido-Martin, T. Bölle, J. H. García-Ortiz, J. Aguilar-Cabello, and C. del Pino , "Higher order dynamic mode decomposition of an experimental trailing vortex", Physics of Fluids 34, 107116 (2022) https://doi.org/10.1063/5.0117611
NO This work was supported in part by the Ministerio de Ciencia e Innovacion of Spain (Grant No. PID2021–124692OA-I00). This work was supported in part by the project B4-2019-11, 0837002010 from the Universidad de Malaga. Funding for open access charge: Universidad de Malaga.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026