]>
The repository administrator has not yet configured an RDF license.
INVE_MEM_2010_80611.pdf
indexcodes.txt
lightbox.jpg
preview.jpg
medium.jpg
small.jpg
text/html
HTML Summary of #7671
Structural changes of laminar separation bubbles induced by global linear instability
Structural changes of laminar separation bubbles induced by global linear instability (PDF)
Structural changes of laminar separation bubbles induced by global linear instability (Other)
Structural changes of laminar separation bubbles induced by global linear instability (Other)
Structural changes of laminar separation bubbles induced by global linear instability (Other)
Structural changes of laminar separation bubbles induced by global linear instability (Other)
Structural changes of laminar separation bubbles induced by global linear instability (Other)
The topology of the composite flow fields reconstructed by linear superposition of a two-dimensional boundary layer flow with an embedded laminar separation bubble and its leading three-dimensional global eigenmodes has been studied. According to critical point theory, the basic flow is structurally unstable; it is shown that in the presence of three-dimensional disturbances the degenerate basic flow topology is replaced by a fully three-dimensional pattern, regardless of the amplitude of the superposed linear perturbations. Attention has been focused on the leading stationary eigenmode of the laminar separation bubble discovered by Theofilis; the composite flow fields have been fully characterized with respect to the generation and evolution of their critical points. The stationary global mode is shown to give rise to a three-dimensional flow field which is equivalent to the classical U-shaped separation, defined by Hornung & Perry, and induces topologies on the surface streamlines that are resemblant to the characteristic stall cells observed experimentally.
655
2010-12
Structural changes of laminar separation bubbles induced by global linear instability
Aeronautics
Aeronáutica
Física
Physics
Cambridge University Press
Theofilis
Vassilios
Vassilios Theofilis
Rodríguez Álvarez
Daniel
Daniel Rodríguez Álvarez
00221120
Journal of Fluid Mechanics