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    Nonlinear Interaction of Two Waves in Boundary-Layer Flows

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    Downloads: 241
    Date
    1980
    Author
    Nayfeh, Ali H.
    Bozatli, A. N.
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    Abstract
    First_order nonlinear interactions of Tollmien-Schlichting waves of different frequencies and initial amplitudes in boundary_layer flows are analyzed using the method of multiple scales. Numerical results for flow past a flat plate show that the spatial detuning wipes out resonant interactions unless the initial amplitudes are very large. Thus, a wave having a moderate amplitude has little influence on its subharmonic although it has a strong influence on its second harmonic. Moreover, two waves having moderate amplitudes have a strong influence on their difference frequency. The results show that the difference frequency can be very unstable when generated by the nonlinear interaction, even though it may be stable when introduced by itself in the boundary layer.
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    http://hdl.handle.net/10919/47641
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    • Scholarly Works, Department of Biomedical Engineering and Mechanics [409]

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