Abstract
Linear stability of wall-bounded shear layers modified by distributed
suction has been
considered. Wall suction was introduced in order to simulate distributed
surface
roughness. In all cases studied, i.e. Poiseuille and Couette flows and
Blasius
boundary layer, wall suction was able to induce a new type of instability
characterized by the
appearance of streamwise vortices. Results of calculations show that a
linear model of
suction-induced flow modifications provides a sufficiently accurate representation
of
the basic state. The effects of an arbitrary suction distribution can,
therefore, be
assessed by decomposing this distribution into Fourier series and carrying
out stability analysis on a mode-by-mode basis, i.e. once and for ever.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Cited by
79 articles.
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