%0 Journal Article %1 bagheri2009global %A Bagheri, Shervin %A Schlatter, Philipp %A Schmid, Peter J. %A Henningson, Dan S. %D 2009 %I Cambridge University Press %J Journal of Fluid Mechanics %K 76e09-stability-and-instability-of-nonparallel-flows 76e30-hydrodynamic-stability-nonlinear-effects %P 33-44-- %R DOI: 10.1017/S0022112009006053 %T Global stability of a jet in crossflow %U https://www.cambridge.org/core/article/global-stability-of-a-jet-in-crossflow/3777A4D80B58F23625EF95E5D7486B41 %V 624 %X 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.

@article{bagheri2009global, 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.}, added-at = {2021-02-21T23:29:14.000+0100}, author = {Bagheri, Shervin and Schlatter, Philipp and Schmid, Peter J. and Henningson, Dan S.}, biburl = {https://www.bibsonomy.org/bibtex/23bef13c8d8c350669a073b89f728b744/gdmcbain}, description = {Global stability of a jet in crossflow | Journal of Fluid Mechanics | Cambridge Core}, doi = {DOI: 10.1017/S0022112009006053}, interhash = {b6c6a697f1e84786618a6bc8a22e2d2a}, intrahash = {3bef13c8d8c350669a073b89f728b744}, issn = {00221120}, journal = {Journal of Fluid Mechanics}, keywords = {76e09-stability-and-instability-of-nonparallel-flows 76e30-hydrodynamic-stability-nonlinear-effects}, pages = {33-44--}, publisher = {Cambridge University Press}, timestamp = {2021-02-22T04:29:55.000+0100}, title = {Global stability of a jet in crossflow}, url = {https://www.cambridge.org/core/article/global-stability-of-a-jet-in-crossflow/3777A4D80B58F23625EF95E5D7486B41}, volume = 624, year = 2009 }