On Subharmonic Resonance and Other Nonlinear Mechanisms in Wavepackets in Boundary Layers

2021 ◽  
pp. 97-105
Author(s):  
A. G Martinez ◽  
F. H. T Himeno ◽  
M. S. Mathias ◽  
M. A. F. Medeiros
Keyword(s):  
Boundary Layers ◽  
Subharmonic Resonance

A model for subharmonic resonance within wavepackets in unstable boundary layers

2001 ◽  
Vol 432 ◽  
pp. 409-418 ◽  
Author(s):  
A. D. D. CRAIK
Keyword(s):  
Boundary Layer ◽  
Boundary Layers ◽  
Initial Phase ◽  
Nonlinear Effects ◽  
Subharmonic Resonance ◽  
Simple Explanation ◽  
Resonance Mechanism ◽  
Space And Time ◽  
Wave Resonance ◽  
Blasius Boundary Layer

In recent experiments on the growth of localized disturbances in a Blasius boundary layer, Medeiros & Gaster (1999a, b) observed that the development of nonlinear effects depends markedly on the initial phase of their imposed disturbance. Here, a simple explanation of this phenomenon is proposed. Because the disturbance is localized in space and time, it has a spread of wavenumbers and frequencies: among these are components which can initiate a pair of resonant subharmonic waves with well-determined phase, which are then amplified by the familiar three-wave resonance mechanism. The amplitude attained after some time is strongly phase-dependent, consistent with the experimental observations.

Hydrodynamic Instability of the Wetting Films (Boundary Layers)

Langmuir ◽  
1996 ◽  
Vol 12 (2) ◽  
pp. 606-606
Author(s):  
V. E. Smorodin
Keyword(s):  
Boundary Layers ◽  
Hydrodynamic Instability ◽  
Wetting Films

NEW IMAGINARY-VALUED SIMILARITY SOLUTIONS FOR LAMINAR BOUNDARY LAYERS WITH A SPRAY

2009 ◽  
Vol 19 (12) ◽  
pp. 1105-1111
Author(s):  
Ro'ee Z. Orland ◽  
David Katoshevski ◽  
D. M. Broday
Keyword(s):  
Boundary Layers ◽  
Similarity Solutions ◽  
Laminar Boundary Layers

TRANSITIONAL BOUNDARY LAYERS (INTERMITTENCY MEASUREMENT)

1998 ◽  
Author(s):  
Jafar Madadnia ◽  
Mark W. Johnson ◽  
John C. Gibbings
Keyword(s):  
Boundary Layers
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