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Visualizations of the flow inside an open cavity at medium range Reynolds numbers

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Abstract

The interaction between a laminar boundary layer and an open cavity is investigated experimentally for medium range Reynolds numbers. Flow visualizations are carried out for three different observation directions in order to understand the spatial development of dynamical structures. In particular, synchronized visualizations in two parallel planes picture the transverse development of the flow. The study is conducted by changing the cavity aspect ratio, the Reynolds number and therefore the flow patterns inside the cavity. The issue is to emphasize the 3-D development of the flow. In particular, we show that the dynamical structures are not due to secondary shear layer instabilities.

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Abbreviations

A :

plate length upstream of the cavity

B :

plate length downstream of the cavity

D :

wind tunnel height

Gö :

Görtler number

H :

cavity height

k :

wave number

L :

cavity length

R :

aspect ratio

r c :

curvature radius

Re :

Reynolds number

S :

wind tunnel span

t :

time

U c :

convection velocity inside the cavity

U e :

external velocity

(x, y, z):

Cartesian coordinates

Δ:

difference

δ:

boundary layer thickness inside the cavity

δ2 :

momentum thickness inside the cavity

Λ:

dimensionless coefficient

λ:

wavelength

ν:

kinematics viscosity

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Authors and Affiliations

  1. Laboratoire d’Informatique pour la Mécanique et les Sciences de l’Ingénieur, Unité Propre de Recherche 3251, Centre National de la Recherche Scientifique, B.P. 133, 91403, Orsay Cedex, France

    Thierry M. Faure, Panayotis Adrianos, François Lusseyran & Luc Pastur

  2. Université Pierre et Marie Curie, Paris 6, 4 place Jussieu, 75252, Paris Cedex 05, France

    Thierry M. Faure & Panayotis Adrianos

  3. Université Paris-Sud, Paris 11, 91405, Orsay Cedex, France

    Luc Pastur

Authors
  1. Thierry M. Faure
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  2. Panayotis Adrianos
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  3. François Lusseyran
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  4. Luc Pastur
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Correspondence to Thierry M. Faure.

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Faure, T.M., Adrianos, P., Lusseyran, F. et al. Visualizations of the flow inside an open cavity at medium range Reynolds numbers. Exp Fluids 42, 169–184 (2007). https://doi.org/10.1007/s00348-006-0188-8

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  • DOI: https://doi.org/10.1007/s00348-006-0188-8

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