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Talks and Poster Presentations (without Proceedings-Entry):

S. Braun, A. Kluwick:
"Three-dimensional marginal separation of laminar viscous wall jets and boundary layer flows";
Talk: 20th International Congress of Theoretical and Applied Mechanics (ICTAM), Chicago, Illinois/US; 2000-08-27 - 2000-09-02.



English abstract:
Solutions of the classical boundary layer equations with adverse pressure gradient often terminate in the form of a Goldstein singularity. In a number of interesting cases the strength of this singularity becomes arbitrarily small as some controlling parameter approaches a critical value. Then a local interaction strategy can be
applied successfully to describe short separation regions, i.e. marginally separated boundary layers. The corresponding wall shear distribution is described by a nonlinear integro-differential equation. Representitive examples include a viscous jet past a curved wall and the flow past a slender airfoil at a small angle of attack.
In the present study the effect of three-dimensional surface mounted obstacles on the local flow field is investigated with special emphasis on the occurrence of nonunique solutions. The numerical treatment of both types of interaction equations reveals significant differences in the flow behaviour of wall jets and boundary layers.

Created from the Publication Database of the Vienna University of Technology.