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Journal articles
Global stability of a jet in crossflow
Abstract : A linear stability analysis shows that the jet in crossflow is characterized by self-sustained global oscillations for a jet-to-crossflow velocity ratio of 3. A fully three-dimensional unstable steady-state solution and its associated global eigenmodes are computed by direct numerical simulations and iterative eigenvalue routines. The steady flow, obtained by means of selective frequency damping, consists mainly of a (steady) counter-rotating vortex pair (CVP) in the far field and horseshoe-shaped vortices close to the wall. High-frequency unstable global eigenmodes associated with shear-layer instabilities on the CVP and low-frequency modes associated with shedding vortices in the wake of the jet are identified. Furthermore, different spanwise symmetries of the global modes are discussed. This work constitutes the first simulation-based global stability analysis of a fully three-dimensional base flow. © 2009 Cambridge University Press.
Cited literature [21 references]
https://hal-polytechnique.archives-ouvertes.fr/hal-01002593
Contributor : Denis Roura <>
Submitted on : Monday, July 7, 2014 - 5:58:44 PM
Last modification on : Monday, July 27, 2020 - 1:00:05 PM
Long-term archiving on: : Tuesday, October 7, 2014 - 10:41:35 AM
Contributor : Denis Roura <>
Submitted on : Monday, July 7, 2014 - 5:58:44 PM
Last modification on : Monday, July 27, 2020 - 1:00:05 PM
Long-term archiving on: : Tuesday, October 7, 2014 - 10:41:35 AM
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