Response of shear flowsto external disturbances

Contents:

1. Acoustic receptivity of laminar separating boundary layer 2. Acoustic receptivity of laminar micro jet

Multimedia files – 7/13

The following examples are visual demonstrationof strong effects on the flow pattern which

can have external perturbations coupledwith the shear-layer instabilities

A video clip by V.V. Kozlov, F.-R. Grosche, A.V. Dovgal, H. Bippes, A.Kühn, H. Stiewitt (DLR, Göttingen, 1993)

1. Acoustic receptivity of laminar separating boundary layer (I)

(see page of notes)

Click to play

A video clip by V.V. Kozlov, F.-R. Grosche, A.V. Dovgal, H. Bippes, A.Kühn, H. Stiewitt (DLR, Göttingen, 1993)

1. Acoustic receptivity of laminar separating boundary layer (II)

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2. Acoustic receptivity of laminar micro jet (I)

(see page of notes)

Micro jet (left) forced transversally by acoustic waves (right)

A video clip by Yu.A. Litvinenko, G.R. Grek, V.V. Kozlov, M.V. Litvinenko (2010)

2. Acoustic receptivity of laminar micro jet (II)

Click to play