Global stability of a jet in crossflow
Bagheri S, Schlatter P, Schmid PJ, Henningson DS (2009)
Publication Type: Journal article
Publication year: 2009
Journal
Book Volume: 624
Pages Range: 33-44
DOI: 10.1017/S0022112009006053
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.
Authors with CRIS profile
Involved external institutions
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
École Polytechnique - Université Paris-Saclay
France (FR)
Sweden (SE)
École Polytechnique - Université Paris-Saclay
France (FR)
How to cite
APA:
Bagheri, S., Schlatter, P., Schmid, P.J., & Henningson, D.S. (2009). Global stability of a jet in crossflow. Journal of Fluid Mechanics, 624, 33-44. https://doi.org/10.1017/S0022112009006053
MLA:
Bagheri, Shervin, et al. "Global stability of a jet in crossflow." Journal of Fluid Mechanics 624 (2009): 33-44.
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