Results 1 to 10 of about 22,502 (309)

Discontinuous transition to active nematic turbulence [PDF]

Nature Communications
Active fluids exhibit chaotic flows at low Reynolds number known as active turbulence. Whereas the statistical properties of the chaotic flows are increasingly well understood, the nature of the transition from laminar to turbulent flows as activity ...
Malcolm Hillebrand, Ricard Alert
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Nonmodal nonlinear route of transition to two-dimensional turbulence

Physical Review Research, 2020
Turbulence has remained an unsolved problem in physics, despite the availability of some numerical results. The onset and growth of disturbances leading to two- and three-dimensional turbulence have been theoretically and computationally shown for wall ...
Aditi Sengupta, Prasannabalaji Sundaram, Tapan K. Sengupta   +2 more
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Transition to chemical turbulence [PDF]

Chaos: An Interdisciplinary Journal of Nonlinear Science, 1991
Experiments have been conducted on Turing-type chemical spatial patterns and their variants in a quasi-two-dimensional open spatial reactor with a chlorite–iodide–malonic acid reaction. A variety of stationary spatial structures−hexagons, stripes, and mixed states−were observed, and transitions to these states were studied.
Ouyang, Q., Swinney, Harry L.
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The Application of the γ-Re_θt Transition Model Using Sustaining Turbulence

Energies, 2022
The freestream turbulence intensity is an important parameter for Tollmien–Schlichting waves and is also used as one of the key variables for the local- and transport-equation-based transition model in the simulations.
Meihong Zhang, Shengyang Nie, Xiaoxuan Meng, Yingtao Zuo   +3 more
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Transitions to Electrochemical Turbulence [PDF]

Physical Review Letters, 2005
We report experimental evidence of transitions from limit cycle oscillations through a phase turbulent regime to space-time defect turbulence in a spatially (quasi-)one-dimensional electrochemical system with nonlocal coupling. The transitions are characterized in terms of the defect density, the Karhunen-Loève decomposition dimension, and a measure of
Varela, H., Beta, C., Bonnefont, A., Krischer, K.   +3 more
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On the laminar–turbulent transition mechanism on megawatt wind turbine blades operating in atmospheric flow [PDF]

Wind Energy Science, 2023
Among a few field experiments on wind turbines for analyzing laminar–turbulent boundary layer transition, the results obtained from the DAN-AERO and aerodynamic glove projects provide significant findings.
B. A. Lobo, Ö. S. Özçakmak, H. A. Madsen, A. P. Schaffarczyk, M. Breuer, N. N. Sørensen   +5 more
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Intermittency in the Transition to Turbulence [PDF]

SIAM Journal on Applied Mathematics, 2003
The aim of the paper is to provide a simple model which avoids the detailed complexities of three-dimensional turbulent flow, but which is nevertheless built solidly on observed features of turbulence and on an experimentally determined drag law. The first section deals with the characteristics of the intermittent transition to turbulence in pipe flow,
Fowler, A, Howell, P
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Data-Driven Transition Models for Aeronautical Flows with a High-Order Numerical Method

Aerospace, 2022
Over the past years, there has been innovative ideas about data-driven turbulence modeling proposed by scholars all over the world. This paper is a continuity of these significant efforts, with the aim of offering a better representation for turbulence ...
Yanjun Chen, Shengye Wang, Wei Liu
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Transition to Turbulent Dynamo Saturation [PDF]

Physical Review Letters, 2017
While the saturated magnetic energy is independent of viscosity in dynamo experiments, it remains viscosity-dependent in state-of-the-art 3D direct numerical simulations (DNS). Extrapolating such viscous scaling-laws to realistic parameter values leads to an underestimation of the magnetic energy by several orders of magnitude.
Seshasayanan, Kannabiran, Gallet, Basile, Alexakis, Alexandros   +2 more
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Intermittency and Critical Scaling in Annular Couette Flow

Entropy, 2020
The onset of turbulence in subcritical shear flows is one of the most puzzling manifestations of critical phenomena in fluid dynamics. The present study focuses on the Couette flow inside an infinitely long annular geometry where the inner rod moves with
Kazuki Takeda, Yohann Duguet, Takahiro Tsukahara   +2 more
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