Results 41 to 50 of about 14,454,704 (305)

Structured interference optical coherence tomography [PDF]

open access: yesOptics Letters, 2012
We developed a structured interference optical coherence tomography (SIOCT) to enhance the lateral resolution beyond the diffraction limit. A sinusoidal pattern is created on the interferometric beam with the reference intensity temporally modulated.
Ji, Yi   +3 more
openaire   +2 more sources

Evaluation of Actuator Disk Model Relative to Actuator Surface Model for Predicting Utility-Scale Wind Turbine Wakes

open access: yesEnergies, 2020
The Actuator Disk (AD) model is widely used in Large-Eddy Simulations (LES) to simulate wind turbine wakes because of its computing efficiency. The capability of the AD model in predicting time-average quantities of wind tunnel-scale turbines has been ...
Zhaobin Li, Xiaolei Yang
doaj   +1 more source

Control Parameters for Boundary-Layer Instabilities in Unsteady Shock Interactions

open access: yesEntropy, 2012
This article presents the computation of a set of control parameters for the deterministic prediction of laminar boundary-layer instabilities induced by an imposed unsteady shock interaction.
LaVar King Isaacson
doaj   +1 more source

COMPRESSIVE COHERENT STRUCTURES AT ION SCALES IN THE SLOW SOLAR WIND [PDF]

open access: yes, 2016
We present a study of magnetic field fluctuations in a slow solar wind stream, close to ion scales, where an increase of the level of magnetic compressibility is observed. Here, the nature of these compressive fluctuations is found to be characterized by
D. Perrone   +8 more
semanticscholar   +1 more source

The Intermittency of Turbulence in Magneto-Hydodynamical Simulations and in the Cosmos

open access: yesAtmosphere
Turbulent dissipation is a central issue in the star and galaxy formation process. Its fundamental property of space–time intermittency, well characterised in incompressible laboratory experiments, remains elusive in cosmic turbulence.
Pierre Lesaffre   +2 more
doaj   +1 more source

Synchronicity from Synchronized Chaos

open access: yesEntropy, 2015
The synchronization of loosely-coupled chaotic oscillators, a phenomenon investigated intensively for the last two decades, may realize the philosophical concept of “synchronicity”—the commonplace notion that related eventsmysteriously occur at the same ...
Gregory S. Duane
doaj   +1 more source

A Spatial Correlation Identification Model for Coherent Structure Extraction and Three-Dimensional Visualization

open access: yesJournal of Marine Science and Engineering
Multi-scale coherent structures have been observed in ocean currents, which are induced by the interaction of shear flows with different velocities. Understanding the spatial configuration and scale characteristics of coherent structures will promote the
Beibei Mao   +4 more
doaj   +1 more source

Accuracy of the Cell-Set Model on a Single Vane-Type Vortex Generator in Negligible Streamwise Pressure Gradient Flow with RANS and LES

open access: yesJournal of Marine Science and Engineering, 2020
Passive flow control devices are included in the design of wind turbine blades in order to obtain better performance and reduce loads without consuming any external energy.
Iosu Ibarra-Udaeta   +4 more
doaj   +1 more source

CABARET scheme implementation for free shear layer modeling [PDF]

open access: yesКомпьютерные исследования и моделирование, 2017
In present paper we reexamine the properties of CABARET numerical scheme formulated for a weakly compressible fluid flow basing the results of free shear layer modeling. Kelvin-Helmholtz instability and successive generation of two-dimensional turbulence
Yury Matveevich Kulikov   +1 more
doaj   +1 more source

Stochastic Wake Modelling Based on POD Analysis

open access: yesEnergies, 2018
In this work, large eddy simulation data is analysed to investigate a new stochastic modeling approach for the wake of a wind turbine. The data is generated by the large eddy simulation (LES) model PALM combined with an actuator disk with rotation ...
David Bastine   +3 more
doaj   +1 more source

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