HOMOCLINIC BIFURCATION IN BLASIUS BOUNDARY-LAYER FLOW

被引：12
作者：
EHRENSTEIN, U [1 ]
KOCH, W [1 ]
机构：
[1] DLR,INST STROMUNGSMECH,D-37073 GOTTINGEN,GERMANY
来源：
PHYSICS OF FLUIDS | 1995年 / 7卷 / 06期
关键词：
D O I：
10.1063/1.868517
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In an attempt to elucidate the laminar/turbulent transition mechanism in a Blasius boundary-layer flow, a nonsemisimple resonance of phase-locked secondary instability modes is investigated. The local nonlinear behavior is described by means of a center manifold reduction. The numerically computed normal form is of the symmetric Takens-Bogdanov type and predicts a homoclinic orbit which is possibly related to a physical bursting process. A global continuation procedure for equilibrated three-dimensional (3-D) waves in the full Navier-Stokes system validates some of the local predictions and very closely outlines the experimentally observed skin friction domain including subcritical transition. © 1995 American Institute of Physics.
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页码：1282 / 1291
页数：10
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