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Scaling turbulence in the near-wall region
Marcus Hultmark,Alexander Smits +1 more
TLDR
In this paper, a new velocity scale was derived that yields a Reynolds number independent profile for the streamwise turbulent fluctuations in the near-wall region of wall bounded flows for $y^+ < 25.Abstract:
A new velocity scale is derived that yields a Reynolds number independent profile for the streamwise turbulent fluctuations in the near-wall region of wall bounded flows for $y^+<25$. The scaling demonstrates the important role played by the wall shear stress fluctuations and how the large eddies determine the Reynolds number dependence of the near-wall turbulence distribution.read more
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Reynolds stress scaling in the near-wall region of wall-bounded flows
TL;DR: In this paper, a new scaling was derived that yields a Reynolds-number independent profile for all components of the Reynolds stress in the near-wall region of wall-bounded flows, including channel, pipe and boundary layer flows.
Posted Content
Asymptotics of stream-wise Reynolds stress in wall turbulence
TL;DR: In this paper, Chen and Sreenivasan (2021) extracted two terms of the inner asymptotic expansion of a stream-wise normal stress profile in the small parameter $Re_\tau^{-1/4}$ from a set of direct numerical simulations (DNS) of channel flow.
Posted Content
Reynolds stress scaling in the near-wall region
Alexander Smits,Marcus Hultmark +1 more
TL;DR: In this article, a new scaling is derived that yields a Reynolds number independent profile for all components of the Reynolds stress in the near-wall region of wall bounded flows, demonstrating the important role played by the wall shear stress fluctuations and how the large eddies determine the Reynolds number dependence of the nearwall turbulence behavior.
Journal ArticleDOI
Reynolds stress scaling in the near-wall region of wall-bounded flows
TL;DR: In this article, a new scaling is derived that yields a Reynolds number independent profile for all components of the Reynolds stress in the near-wall region of wall bounded flows, including channel, pipe and boundary layer flows.
References
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Journal ArticleDOI
Direct numerical simulation of turbulent channel flow up to
Myoungkyu Lee,Robert D. Moser +1 more
TL;DR: In this paper, a direct numerical simulation of incompressible channel flow at a friction Reynolds number of 5186 has been performed, and the flow exhibits a number of the characteristics of high-Reynolds-number wall-bounded turbulent flows.
Journal ArticleDOI
Mean-flow scaling of turbulent pipe flow
M. V. Zagarola,Alexander Smits +1 more
TL;DR: In this article, a new friction factor relation is proposed which is within ± 1.2% of the data for Reynolds numbers between 10×103 and 35×106, and includes a term to account for the near-wall velocity profile.
Journal ArticleDOI
Reynolds-number scaling of the flat-plate turbulent boundary layer
David B. De Graaff,John K. Eaton +1 more
TL;DR: In this article, the authors used a low-speed, high-Reynolds-number facility and a high-resolution laser-Doppler anemometer to measure Reynolds stresses for a flat-plate turbulent boundary layer from Reθ = 1430 to 31 000.
Journal ArticleDOI
Scaling of the energy spectra of turbulent channels
TL;DR: In this paper, the spectra and correlations of the velocity fluctuations in turbulent channels, especially above the buffer layer, were analyzed using direct numerical simulations with friction Reynolds numbers up to Re at very large ones.
Journal ArticleDOI
Predictive Model for Wall-Bounded Turbulent Flow
TL;DR: A mathematical model is proposed to predict the near-wall turbulence given only large-scale information from the outer boundary layer region, which may enable new strategies for the control of turbulence and may provide a basis for improved engineering and weather prediction simulations.
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