The evolution of a finite‐amplitude point‐like laminar disturbance in plane Poiseuille flow is investigated using hot‐wire anemometry. In contrast to earlier experiments, the initial disturbance was introduced simultaneously through both the upper and lower wall of the channel, resulting in an antisymmetric disturbance in the normal velocity. Although the initial disturbance mainly generated symmetrical streamwise velocity modes, the subsequent development of the perturbation showed a marked tendency for antisymmetry.
REFERENCES
1.
M. T.
Landahl
, “A note on an algebraic instability of inviscid parallel shear flows
,” J. Fluid Mech.
98
, 243
(1980
).2.
L. H.
Gustavsson
, “Energy growth of three-dimensional disturbances in plane Poiseuille flow
,” J. Fluid Mech.
224
, 241
(1991
).3.
K. M.
Butler
and B. F.
Farrell
, “Three-dimensional optimal perturbations in viscous shear flow
,” Phys. Fluids A
4
, 1637
(1992
).4.
B. G. B.
Klingmann
, “On transition due to three-dimensional disturbances in plane Poiseuille flow
,” J. Fluid Mech.
240
, 167
(1992
).
This content is only available via PDF.
© 1994 American Institute of Physics.
1994
American Institute of Physics
You do not currently have access to this content.
