2005
DOI: 10.1007/s10697-005-0090-8
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Investigation of Mechanisms of Excitation and Growth of Unstable Perturbations in Pulsating Flows

Abstract: General laws of the processes of generation and amplification of secondary perturbations in oscillating viscous fluid flows are studied theoretically. The stability and receptivity are analyzed with reference to perturbations generated by fluctuations of the flow rate of Poiseuille flow induced by small two-dimensional roughnesses of the channel walls. It is shown that the presence of roughness leads to excitation in the flow of perturbations at all multiples of the main flow oscillation frequency. Using the F… Show more

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