Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/105660
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dc.contributor.authorTang, Zhanqien
dc.contributor.authorJiang, Nanen
dc.contributor.authorZheng, Xiaoboen
dc.contributor.authorWu, Yanhuaen
dc.date.accessioned2019-06-13T06:05:13Zen
dc.date.accessioned2019-12-06T21:55:23Z-
dc.date.available2019-06-13T06:05:13Zen
dc.date.available2019-12-06T21:55:23Z-
dc.date.issued2019en
dc.identifier.citationTang, Z., Jiang, N., Zheng, X., & Wu, Y. (2019). Local dynamic perturbation effects on amplitude modulation in turbulent boundary layer flow based on triple decomposition. Physics of Fluids, 31(2), 025120-. doi:10.1063/1.5083224en
dc.identifier.issn1070-6631en
dc.identifier.urihttps://hdl.handle.net/10356/105660-
dc.description.abstractThis work studies amplitude modulation (AM) of a turbulent boundary layer flow perturbed by a wall-mounted piezoelectric (PZT) actuator. Hot-wire measurements were executed downstream of the PZT actuator working at a certain frequency but several different amplitudes. Turbulent nonlinear fluctuations acquired by triple decomposition were devoted to observing the AM effects. The PZT actuator has a significant impact on the distribution of AM coefficients and joint probability-density functions of large-scale fluctuations and the representatives of small scales in the inner region. Moreover, the energy dependence of small scales on large-scale structures was observed. It proposes that an interlayer region ofy+.14 characterized by strong energy dependence of high linear slope occurs between innate near-wall structures in the underlying boundary layer flow and wall surface. It was suggested that this interlayer probably suppresses turbulence generation and self-sustaining process of the near-wall cycle. In addition, the conditional AM coefficients further manifests that the AM in the interlayer is insensitive to the condition of large-scale structures.en
dc.format.extent14 p.en
dc.language.isoenen
dc.relation.ispartofseriesPhysics of Fluidsen
dc.rights© 2019 The Author(s). All rights reserved. This paper was published by AIP Publishing in Physics of Fluids and is made available with permission of The Author(s).en
dc.subjectAmplitude Modulationen
dc.subjectBoundary Layer Flowen
dc.subjectDRNTU::Engineering::Mechanical engineeringen
dc.titleLocal dynamic perturbation effects on amplitude modulation in turbulent boundary layer flow based on triple decompositionen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen
dc.identifier.doi10.1063/1.5083224en
dc.description.versionPublished versionen
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item.grantfulltextopen-
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