Memorias de investigación
Artículos en revistas:
BiGlobal stability analysis in curvilinear coordinates of massively separated lifting bodies
Año:2009
Áreas de investigación
  • Mecánica de fluidos
Datos
Descripción
A methodology based on spectral collocation numerical methods for global flow stability analysis of incompressible external flows is presented. A potential shortcoming of spectral methods, namely the handling of the complex geometries encountered in global stability analysis, has been dealt with successfully in past works by the development of spectral-element methods on unstructured meshes. The present contribution shows that a certain degree of regularity of the geometry may be exploited in order to build a global stability analysis approach based on a regular spectral rectangular grid in curvilinear coordinates and conformal mappings. The derivation of the stability linear operator in curvilinear coordinates is presented along with the discretisation method. Unlike common practice to the solution of the same problem, the matrix discretising the eigenvalue problem is formed and stored. Subspace iteration and massive parallelisation are used in order to recover a wide window of its leading Ritz system. The method is applied to two external flows, both of which are lifting bodies with separation occurring just downstream of the leading edge. Specifically the flow configurations are a NACA 0015 airfoil, and an ellipse of aspect ratio 8 chosen to closely approximate the geometry of the airfoil. Both flow configurations are at an angle of attack of 18, with a Reynolds number based on the chord length of 200. The results of the stability analysis for both geometries are presented and illustrate analogous features.
Internacional
Si
JCR del ISI
Si
Título de la revista
JOURNAL OF COMPUTATIONAL PHYSICS
ISSN
0021-9991
Factor de impacto JCR
2,279
Información de impacto
Volumen
228
DOI
Número de revista
19
Desde la página
7181
Hasta la página
7196
Mes
OCTUBRE
Ranking
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Participantes
  • Participante: Andrew Ooi University of Melbourne
  • Participante: Julio Soria Monash University
  • Autor: Vassilios Theofilis . UPM
  • Participante: Vassili Kitsios University of Melbourne
  • Participante: Daniel Rodríguez California Institute of Technology
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Mecánica de Fluidos Computacional
  • Departamento: Motopropulsión y Termofluidodinámica