Resonant enhancement of turbulent energy dissipation

E.H. Cekli, C.R. Tipton, W. Water, van de

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)
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Abstract

We periodically modulate a turbulent wind-tunnel flow with an active grid. We find a resonant enhancement of the mean turbulent dissipation rate at a modulation frequency which equals the large-eddy turnover rate. Thus, we find the best frequency to inject energy into a turbulent flow. The resonant response is characterized by the emergence of vortical structures in the flow and depends on the spatial mode of the stirring grid.
Original languageEnglish
Article number044503
Pages (from-to)1/4-
Number of pages4
JournalPhysical Review Letters
Volume105
Issue number4
DOIs
Publication statusPublished - 2010

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