# Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Structure of streaks near the leading edge singularity in a Blasius boundary layer
Year:2008
Research Areas
• Fluid mechanics
Information
Abstract
Streaky (S) perturbations (also called Klebanoff modes) in a Blasius boundary layer are examined in the vicinity of the leading edge singularity. Understanding the mathematical structure of S-perturbations in this limit requires to consider two eigenvalue problems, whose eigenfunctions exhibit two well separated scales in the normal direction: (i) $\zeta=y/\sqrt(x)\sim 1$ and (ii) $y=\zeta \sqrt(x)\sim1$, where $\zeta$ is the usual self similar variable in the boundary layer and $x$ is the streamwise coordinate. These eigenvalue problems were considered by Luchini (JFM 1996), who calculated some of their solutions. The remaining solutions are calculated and used to obtain approximations of the relevant solutions of streamwise evolving parabolic problem that provides S-perturbaions in this limit. Some of the results are also relevant in the restricted 2D problem.
International
Si
Congress
61st Annual Meeting of the APS Division of Fluid Dynamics
960
Place
San Antonio, Texas, EE.UU
Reviewers
Si
ISBN/ISSN
0003-0503
Start Date
23/11/2008
End Date
25/11/2008
From page
126
To page
126
Participants
• Autor: Jose Manuel Vega De Prada (UPM)
• Autor: Maria Jesus Higuera Torron (UPM)
Research Group, Departaments and Institutes related
• Creador: Grupo de Investigación: Dinámica y estabilidad no lineal en ingeniería aeroespacial
• Departamento: Fundamentos Matemáticos de la Tecnología Aeronáutica
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