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Atmospheric Turbulence Effects on Wind-Turbine Wakes: An LES Study
Energies, 2012 A numerical study of atmospheric turbulence effects on wind-turbine wakes is presented. Large-eddy simulations of neutrally-stratified atmospheric boundary layer flows through stand-alone wind turbines were performed over homogeneous flat surfaces with ...
Yu-Ting Wu, Fernando Porté-Agel
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Intense Reynolds-stress events in turbulent ducts
International Journal of Heat and Fluid Flow, 2021 Abstract The aim of the present work is to investigate the role of intense Reynolds shear-stress events in the generation of the secondary flow in turbulent ducts. We consider the connected regions of flow where the product of the instantaneous fluctuations of two velocity components is higher than a threshold based on the long-time turbulence ...
Atzori M. +3 more
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Turbulence intensity measurement in the wind tunnel used for airfoil flutter investigation
EPJ Web of Conferences, 2017 The paper reports on hot wire turbulence intensity measurements performed in the entry of a suction-type wind tunnel, used for investigation of flow-induced vibration of airfoils and slender structures.
Šidlof Petr +3 more
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Optical intensity interferometry through atmospheric turbulence [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 Conventional ground-based astronomical observations suffer from image distortion due to atmospheric turbulence. This can be minimized by choosing suitable geographic locations or adaptive optical techniques, and avoided altogether by using orbital platforms outside the atmosphere.
Tan, PK, Chan, AH, Kurtsiefer, C
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Beam Properties of a Partially Coherent Beam Propagating Horizontally in Atmospheric Turbulence
Photonics, 2023 This study explored the impact of atmospheric turbulence on partially coherent light propagation. Atmospheric turbulence causes random modulation of the intensity and phase of light, resulting in a speckle pattern in the far field.
Zengyan Wu +5 more
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Alexandria Engineering Journal, 2023 Spraying liquid jets in the transverse airflow is suitable for creating tiny droplets in the combustion chamber. This paper numerically investigated the effect of airflow turbulence intensity on liquid jet penetration and breakup.
Bahram Jalili, Payam Jalili
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Direct numerical simulations of transition in a compressor cascade: The influence of free-stream turbulence [PDF]
, 2010 Copyright © Cambridge University Press 2010.The flow through a compressor passage without and with incoming free-stream grid turbulence is simulated.
Durbin, PA +3 more
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Turbulence and Intense Sound Fields [PDF]
The Journal of the Acoustical Society of America, 1956 A brief review is given of present experimental and theoretical knowledge of phenomena involving interaction of strong sound fields and turbulence. Consideration is given to the scattering of sound and shock waves by turbulence, the generation of noise by turbulence, and the effect of intense noise fields or strong resonances on the evolution of a ...
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Nonlocal amplification of intense vorticity in turbulent flows [PDF]
Physical Review Research, 2021 The nonlinear and nonlocal coupling of vorticity and strain-rate constitutes a major hindrance in understanding the self-amplification of velocity gradients in turbulent fluid flows. Utilizing highly-resolved direct numerical simulations of isotropic turbulence in periodic domains of up to $12288^3$ grid points, and Taylor-scale Reynolds number $R_λ ...
Dhawal Buaria, Alain Pumir
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Nonstationary distributions of wave intensities in wave turbulence [PDF]
Journal of Physics A: Mathematical and Theoretical, 2017 We obtain a general solution for the probability density function of wave intensities in non-stationary Wave Turbulence. The solution is expressed in terms of the wave action spectrum evolving according the the wave-kinetic equation. We establish that, in absence of wave breaking, the wave statistics asymptotes to a Gaussian distribution in forced ...
Choi, Yeontaek +3 more
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