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Finite-amplitude bifurcations in plane Poiseuille flow: two-dimensional Hopf bifurcation

Published online by Cambridge University Press:  26 April 2006

Israel Soibelman  and
Daniel I. Meiron
Israel Soibelman
Affiliation:
Applied Mathematics, California Institute of Technology, Pasadena. CA 91125, USA
Daniel I. Meiron
Affiliation:
Applied Mathematics, California Institute of Technology, Pasadena. CA 91125, USA
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Abstract

We examine the stability to superharmonic disturbances of finite-amplitude two-dimensional travelling waves of permanent form in plane Poiseuille flow. The stability characteristics of these flows depend on whether the flux or pressure gradient are held constant. For both conditions we find several Hopf bifurcations on the upper branch of the solution surface of these two-dimensional waves. We calculate the periodic orbits which emanate from these bifurcations and find that there exist no solutions of this type at Reynolds numbers lower than the critical value for existence of two-dimensional waves (≈2900). We confirm the results of Jiménez (1987) who first detected a stable branch of these solutions by integrating the two-dimensional equations of motion numerically.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 229 , August 1991 , pp. 389 - 416
Copyright
© 1991 Cambridge University Press

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