Tranversal motion and flow structure of fully nonlinear streaks in a laminar boundary layer

Martín Bautista, Juan A. y Martel Escobar, Carlos (2011). Tranversal motion and flow structure of fully nonlinear streaks in a laminar boundary layer. En: "64th Annual Meeting of the APS Division of Fluid Dynamics", 20/11/2011 - 22/11/2011, Baltimore, Maryland, EEUU. p. 330.

Descripción

Título: Tranversal motion and flow structure of fully nonlinear streaks in a laminar boundary layer
Autor/es:
  • Martín Bautista, Juan A.
  • Martel Escobar, Carlos
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 64th Annual Meeting of the APS Division of Fluid Dynamics
Fechas del Evento: 20/11/2011 - 22/11/2011
Lugar del Evento: Baltimore, Maryland, EEUU
Título del Libro: Bulletin of the American Phisical Society. 64th Annual Meeting of the APS Division of Fluid Dynamics
Fecha: 2011
Volumen: 56, Is
Materias:
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Fundamentos Matemáticos de la Tecnología Aeronáutica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Typical streak computations present in the literature correspond to linear streaks or to small amplitude nonlinear streaks computed using DNS or nonlinear PSE. We use the Reduced Navier-Stokes (RNS) equations to compute the streamwise evolution of fully non-linear streaks with high amplitude in a laminar flat plate boundary layer. The RNS formulation provides Reynolds number independent solutions that are asymptotically exact in the limit $Re \gg 1$, it requires much less computational effort than DNS, and it does not have the consistency and convergence problems of the PSE. We present various streak computations to show that the flow configuration changes substantially when 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, that 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.

Más información

ID de Registro: 12923
Identificador DC: http://oa.upm.es/12923/
Identificador OAI: oai:oa.upm.es:12923
URL Oficial: http://meetings.aps.org/link/BAPS.2011.DFD.M20.5
Depositado por: Memoria Investigacion
Depositado el: 12 Dic 2012 16:52
Ultima Modificación: 21 Abr 2016 12:15
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