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Memorias de investigación
Ponencias en congresos:
On Instability Properties of Incompressible Laminar Separation Bubbles on a Flat Plate Prior to Shedding
Año:2007
Áreas de investigación
  • Mecánica de fluidos
Datos
Descripción
Our present concern is with identification and systematic classification of the parameters defining the race between two-dimensional shedding and three-dimensional global instability of two-dimensional incompressible laminar separation bubbles. Here attention is paid to separation bubbles generated in a flat plate boundary layer subject to Howarth's adverse-pressure gradient in the Reynolds number range Re in [10000,50000], within which BiGlobal instability in laminar separation bubbles was first discovered. A two-dimensional direct numerical simulation (DNS) methodology is being utilized for the recovery of laminar separated boundary layer flows. Preliminary three-dimensional BiGlobal instability analyses have demonstrated the stringent resolution requirements for complete and accurate description of the instability physics pertinent to the convectively unstable (and globally stable) Kelvin-Helmholtz (KH) modes. This gave rise to the development of novel numerical solution approaches for both the DNS and the BiGlobal eigenvalue problems, based on large-scale parallelization; first results on model applications are reported.
Internacional
Si
Nombre congreso
AIAA-2007-540, 45th AIAA Aerospace Sciences Meeting and Exhibit
Tipo de participación
960
Lugar del congreso
Reno, NV, USA
Revisores
Si
ISBN o ISSN
ISBN-10: 1-56347-890
DOI
Fecha inicio congreso
08/01/2007
Fecha fin congreso
11/01/2007
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Título de las actas
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Vassilios Theofilis (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Mecánica de Fluidos Computacional
  • Departamento: Motopropulsión y Termofluidodinámica
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