Conversion of Measured Turbulence Spectra from Temporal to Spatial Domain

Preben Buchhave, Clara Marika Velte

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The spatial structure of a turbulent velocity field is of great theoretical interest as its kinematics describe the distribution of spatial scales and its dynamics describe their evolution from large energy carrying scales to smaller scales and finally to dissipation.
However, the overwhelming number of turbulence measurements results in time records from stationary probes, either hot-wire probes (hot-wire anemometers, HWA) or laser beam probes (laser Doppler anemometers, LDA). The spatial structure of the turbulent velocity field is then inferred by “Taylor’s hypothesis,”as first presented in [1], assuming a “frozen” velocity field carried past the probe with the local mean velocity. However, Taylor’s hypothesis breaks down at higher turbulence intensities and can then only be applied with additional corrections, see,for example, [2–4].
Original languageEnglish
Title of host publicationWhither Turbulence and Big Data in the 21st Century?
EditorsAndrew Pollard, Luciano Castillo, Luminita Danaila, Mark Glauser
Publication date2017
ISBN (Print)978-3-319-41215-3
ISBN (Electronic)978-3-319-41217-7
Publication statusPublished - 2017

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