Results 51 to 60 of about 3,071,655 (192)

Numerical prediction of shock/boundary-layer interactions at high Mach numbers using a modified Spalart–Allmaras model

open access: yesEngineering Applications of Computational Fluid Mechanics, 2018
The Reynolds-averaged Navier–Stokes equations with one-equation turbulence models are used to simulate the flow field past a cone–flare geometry in the Mach number range from 5 to 8 with emphasis on the interaction region of the flare shock with the ...
Amjad Ali Pasha, K. A. Juhany, M. Khalid
doaj   +1 more source

Numerical Analysis of the Kline and Fogleman Airfoil's Effect on the Operation of Straight Darrieus Wind Turbine [PDF]

open access: yesJournal of Applied Fluid Mechanics
The blade profile selection is paramount for the efficient operation of straight Darrieus wind turbines in terms of torque and power generation. In this work, we have used the Kline-Fogleman Airfoil (KFA) design for the wind turbine blades.
H. Iddou   +3 more
doaj   +1 more source

Large-eddy simulation of the flow in Z-Shape duct

open access: yesCogent Engineering, 2020
A numerical study is conducted of the transient flow in a z-shape three-dimensional duct using large-eddy simulation (LES) with dynamic eddy viscosity subgrid-scale (SGS) model with a fully structured grid system.
Mohammed Karbon, Ahmad K. Sleiti
doaj   +1 more source

Turbulence program for propulsion systems [PDF]

open access: yes, 1995
Program goals at the Center for Modeling of Turbulence and Transition (CMOTT), NASA Lewis Research Center, are (1) to develop reliable turbulence (including bypass transition) and combustion models for complex flows in propulsion systems and (2) to ...
Shih, Tsan-Hsing
core  

Modeling of magnetohydrodynamic turbulence

open access: yes, 2000
Conventional one-point turbulence closures have beenextended with an additional transported scalar for modeling ofmagnetohydrodynamic (MHD) turbulence. The new scalar, α ,captures the length scale anisotropy and tendency towardstwo-dimensionality, which ...
Widlund, Ola
core   +2 more sources

Turbulence closure modeling with machine learning: a foundational physics perspective

open access: yesNew Journal of Physics
Turbulence closure modeling using machine learning (ML) is at an early crossroads. The extraordinary success of ML in a variety of challenging fields had given rise to an expectation of similar transformative advances in the area of turbulence closure ...
Sharath S Girimaji
doaj   +1 more source

Bubble characteristics and turbulent dissipation rate in horizontal bubbly pipe flow

open access: yesAIP Advances, 2021
The energy dissipation rate is a crucial parameter for system control and turbulence modeling but is difficult to quantify in gas–liquid two-phase flows. Little relevant information is available, especially in horizontal pipe flows.
Weiyang Zhao   +4 more
doaj   +1 more source

Workshop on Computational Turbulence Modeling [PDF]

open access: yes, 1993
This document contains presentations given at Workshop on Computational Turbulence Modeling held 15-16 Sep. 1993. The purpose of the meeting was to discuss the current status and future development of turbulence modeling in computational fluid dynamics ...

core  

Development and deployment of data-driven turbulence model for three-dimensional complex configurations

open access: yesMachine Learning: Science and Technology
In recent years, the synergy between artificial intelligence and turbulence big data has given rise to a new data-driven paradigm in turbulence research.
Xuxiang Sun   +6 more
doaj   +1 more source

Experimental Channel Modeling of Free-Space Optical Communications Under Atmospheric Turbulence

open access: yesIEEE Open Journal of the Communications Society
This paper investigates the statistical modeling of atmospheric turbulence-induced fading in free space optical (FSO) communication systems via using a 400-m round-trip retro-reflected urban FSO testbed. Especially, we compare the theoretical FSO channel
Tae-In Oh, Byungju Lim, Young-Chai Ko
doaj   +1 more source

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