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Scale-dependent Response of Fluid Turbulence under Variation of the Large-scale Forcing

Di Lorenzo, Fabio
Dissertation
Angenommen am: 2015-02-03
Erschienen: 2016-02-03
Betreuer: Bodenschatz, Eberhard Prof. Dr.
Gutachter: Bodenschatz, Eberhard Prof. Dr.
Gutachter: Enderlein, Jörg Prof. Dr.

Zum Verlinken/Zitieren: http://hdl.handle.net/11858/00-1735-0000-0028-86B1-C

 

Dateien

Name: 20160202_Di Lorenzo PHD Thesis_fwv.pdf
Größe: 7,8 MB
Format: PDF
Beschreibung: Fabio Di Lorenzo, ...
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Zusammenfassung

Englisch

In this work, an experiment to measure the temporal evolution of energy transfer at different scales in a turbulent flow that was subject to a perturbation of the energy injection is described. Two types of experiments were performed. In the first type a step-function-like increase of the energy input was used to force the turbulent flow. In the second case the forcing of a fully developed turbulent flow was switched off to observe the decay of the turbulence. Experiments investigating the scale dependent response of a turbulent flow to a perturbation of the large-scale forcing have, to the best knowledge of the author, not been done so far. This is due to the complexity of the endeavor and the limitations of state-of-the-art measurement techniques. The approach to overcome these limitations and the hardware developed for this purpose is also documented in this thesis.
Keywords: Turbulence, Scale-dependent response, Lagrangian Particle Tracking, real-time image compression, FPGA
Zugriffsstatistik

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