Investigation of the energy carrying outer layer structures in adverse pressure gradient flows

Taygun Recep Gungor, Ayse Gul Gungor, Yvan Maciel, Mark Phil Simens

Araştırma sonucu: Konferansa katkıYazıbilirkişi

Özet

Spatio-temporal energy spectra are analyzed from a direct numerical simulation of a non-equilibrium adverse pressure gradient (APG) turbulent boundary layer (TBL) spanning Reθ =1500-8200 and shape factor H = 1.4 − 3. The temporal data at two streamwise positions corresponding to small (H = 1.6) and large (H = 2.5) velocity defects are used to obtain the spatio-temporal spectra. The increase in the mean velocity defect has several effects on the energy carrying outer layer structures. The turbulent activity in the inner layer is attenuated. The energy moves away from the wall to the outer layer. The streamwise and spanwise wavelengths of the energy carrying outer layer structures decrease with increasing velocity defect.

Orijinal dilİngilizce
Yayın durumuYayınlandı - 2019
Etkinlik11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019 - Southampton, United Kingdom
Süre: 30 Tem 20192 Ağu 2019

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???event.eventtypes.event.conference???11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
Ülke/BölgeUnited Kingdom
ŞehirSouthampton
Periyot30/07/192/08/19

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© 2019 International Symposium on Turbulence and Shear Flow Phenomena, TSFP. All rights reserved.

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