Results 61 to 70 of about 208,604 (196)
Beam Propagation Through Atmospheric Turbulence Using an Altitude-Dependent Structure Profile with Non-Uniformly Distributed Phase Screens [PDF]
For free-space optical communication systems, numerical wave optics simulations provide a useful technique for modeling turbulence-induced beam degradation when the analytical theory is insufficient for characterizing the atmospheric channel.
Chahine, Yousef K. +3 more
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Minimalist turbulent boundary layer model [PDF]
Physical Review E, 2009 We introduce an elementary model of a turbulent boundary layer over a flat surface, given as a vertical random distribution of spanwise Lamb-Oseen vortex configurations placed over a non-slip boundary condition line. We are able to reproduce several important features of realistic flows, such as the viscous and logarithmic boundary sublayers, and the ...
openaire +3 more sources
First and Second Order Turbulence Closures Applied to Homogeneous Turbulent Bubbly Flows
Journal of Applied Fluid Mechanics, 2019 First and second turbulence models for turbulent bubbly flows are implemented in the CFD code. In the second order turbulence closure, the Reynolds stress tensor of the continuous phase is split into two parts: a turbulent part produced by the gradient ...
F. Chaibina, G. Bellakhal, J. Chahed
doaj
Effect of Liquid Droplets on Turbulence Structure in a Round Gaseous Jet [PDF]
, 1983 A second-order model which predicts the modulation of turbulence in jets laden with uniform size solid particles or liquid droplets is discussed. The approach followed is to start from the separate momentum and continuity equations of each phase and ...
Elghobashi, S. E., Mostafa, A. M.
core +2 more sources
Frontiers in PhysicsUnsupervised physics-informed deep learning can be used to solve computational physics problems by training neural networks to satisfy the underlying equations and boundary conditions without labeled data.
Jan Hauke Harmening +3 more
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Self-organization and nonlocal nature of geophysical turbulence and planetary boundary layers
Геофизический журнал, 2010 The classical paradigm of the theory of turbulence states that any turbulent flow can be considered as a superposition of the fully organized mean motion and the fully chaotic turbulence is characterized by the direct energy cascade (from larger to ...
S. S. Zilitinkevich
doaj +1 more source
Statistical turbulence theory and turbulence phenomenology [PDF]
The application of deductive turbulence theory for validity determination of turbulence phenomenology at the level of second-order, single-point moments is considered. Particular emphasis is placed on the phenomenological formula relating the dissipation
Herring, J. R.
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EnergiesUnderstanding the aerodynamic performance of scaled-down models is vital for providing crucial insights into wind energy optimization. In this study, the aerodynamic performance of a scaled-down model (12%) was investigated.
Zahid Mehmood +3 more
doaj +1 more source
Turbulence Modeling of Torsional Couette Flows
International Journal of Rotating Machinery, 2008 The present study considers the numerical modeling of the turbulent flow inside a rotor-stator cavity subjected or not to a superimposed throughflow.
Sofia Haddadi, Sébastien Poncet
doaj +1 more source
Turbulence spectra in the noise source regions of the flow around complex surfaces [PDF]
The complex turbulent flow around three complex surfaces was measured in detail with a hot wire. The measured data include extensive spatial surveys of the mean velocity and turbulence intensity and measurements of the turbulence spectra and scale length
Boldman, D. R., Olsen, W. A.
core +1 more source