Journal of Fluid Mechanics



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


Israel  Soibelman a1 and Daniel I.  Meiron a1
a1 Applied Mathematics, California Institute of Technology, Pasadena. CA 91125, USA

Article author query
soibelman i   [Google Scholar] 
meiron di   [Google Scholar] 
 

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 ([approximate]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.

(Published Online April 26 2006)
(Received March 13 1990)
(Revised January 21 1991)



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