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Memorias de investigación
Artículos en revistas:
Nonlinear streak computation using boundary region equations
Año:2012
Áreas de investigación
  • Ingeniería aeronaútica
Datos
Descripción
The boundary region equations (BREs) are applied for the simulation of the nonlinear evolution of a spanwise periodic array of streaks in a flat plate boundary layer. The well-known BRE formulation is obtained from the complete Navier?Stokes equations in the high Reynolds number limit, and provides the correct asymptotic description of three-dimensional boundary layer streaks. In this paper, a fast and robust streamwise marching scheme is introduced to perform their numerical integration. Typical streak computations present in the literature correspond to linear streaks or to small-amplitude nonlinear streaks computed using direct numerical simulation (DNS) or the nonlinear parabolized stability equations (PSEs). We use the BREs to numerically compute high-amplitude streaks, a method which requires much lower computational effort than DNS and does not have the consistency and convergence problems of the PSE. It is found that the flow configuration changes substantially as the amplitude of the streaks grows and the nonlinear effects come into play. The transversal motion (in the wall normal-streamwise plane) becomes more important and strongly distorts the streamwise velocity profiles, which end up being quite different from those of the linear case. We analyze in detail the resulting flow patterns for the nonlinearly saturated streaks and compare them with available experimental results.
Internacional
Si
JCR del ISI
Si
Título de la revista
Fluid Dyamics Research
ISSN
1873-7005
Factor de impacto JCR
0,63
Información de impacto
Volumen
44
DOI
10.1088/0169-5983/44/4/045503
Número de revista
4
Desde la página
045503
Hasta la página
045526
Mes
ABRIL
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Juan Angel Martin Bautista (UPM)
  • Autor: Carlos Martel Escobar (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Dinámica y estabilidad no lineal en ingeniería aeroespacial
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