Next Article in Journal
Effect of Finite-Size Heat Source’s Heat Capacity on the Efficiency of Heat Engine
Next Article in Special Issue
Low- and High-Drag Intermittencies in Turbulent Channel Flows
Previous Article in Journal
Synergistic Information Transfer in the Global System of Financial Markets
Previous Article in Special Issue
Intermittency and Critical Scaling in Annular Couette Flow
Open AccessArticle

Flow Statistics in the Transitional Regime of Plane Channel Flow

LIMSI-CNRS, UPR 3251, Université Paris-Saclay, 91405 Orsay, France
Gulliver, ESPCI-CNRS, 10 Rue Vauquelin, 75005 Paris, France
Author to whom correspondence should be addressed.
Entropy 2020, 22(9), 1001;
Received: 16 August 2020 / Revised: 4 September 2020 / Accepted: 4 September 2020 / Published: 8 September 2020
(This article belongs to the Special Issue Intermittency in Transitional Shear Flows)
The transitional regime of plane channel flow is investigated above the transitional point below which turbulence is not sustained, using direct numerical simulation in large domains. Statistics of laminar-turbulent spatio-temporal intermittency are reported. The geometry of the pattern is first characterized, including statistics for the angles of the laminar-turbulent stripes observed in this regime, with a comparison to experiments. High-order statistics of the local and instantaneous bulk velocity, wall shear stress and turbulent kinetic energy are then provided. The distributions of the two former quantities have non-trivial shapes, characterized by a large kurtosis and/or skewness. Interestingly, we observe a strong linear correlation between their kurtosis and their skewness squared, which is usually reported at much higher Reynolds number in the fully turbulent regime. View Full-Text
Keywords: transition to turbulence; spatio-temporal intermittency; channel flow transition to turbulence; spatio-temporal intermittency; channel flow
Show Figures

Figure 1

MDPI and ACS Style

Kashyap, P.V.; Duguet, Y.; Dauchot, O. Flow Statistics in the Transitional Regime of Plane Channel Flow. Entropy 2020, 22, 1001.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop