Results 1 to 10 of about 60,483 (231)

On the Spectrum of Isotropic Turbulence [PDF]

, 1951
Measurements of the spectrum and correlation functions at large Reynolds number (RN ~ 10^5 based on the grid mesh) have been made, as well as a series of accurate spectrum measurements at lower Reynolds number (RN ~ 10^4).
Laufer, J., Liepmann, H. W., Liepmann, Kate   +2 more
core   +1 more source

A review of turbulence measurements using ground-based wind lidars [PDF]

Atmospheric Measurement Techniques, 2013
A review of turbulence measurements using ground-based wind lidars is carried out. Works performed in the last 30 yr, i.e., from 1972–2012 are analyzed. More than 80% of the work has been carried out in the last 15 yr, i.e., from 1997–2012.
A. Sathe, J. Mann
doaj   +1 more source

Distribution of Acoustic Power Spectra for an Isolated Helicopter Fuselage

EPJ Web of Conferences, 2016
The broadband aerodynamic noise can be studied, assuming isotropic flow, turbulence and decay. Proudman’s approach allows practical calculations of noise based on CFD solutions of RANS or URANS equations at the stage of post processing and analysis of ...
Kusyumov A.N., Mikhailov S.A., Garipova L.I., Batrakov A.S., Barakos G.   +4 more
doaj   +1 more source

Sobre la convexidad de la función de presión en el problema de la filtración no lineal

Revista de Matemática: Teoría y Aplicaciones, 2009
We prove the convexity of the pressure function v for the isotropic ideal gaz flow, based on the theorem about the zeros of the solution of the parabolic equation (1) Keywords: fluid mechanics, turbulence, parabolic ...
Vladimir N Grebenev
doaj   +1 more source

Homogeneity and isotropy in a laboratory turbulent flow

, 2013
We present a new design for a stirred tank that is forced by two parallel planar arrays of randomly actuated synthetic jets. This arrangement creates turbulence at high Reynolds number with low mean flow.
Bellani, Gabriele, Variano, Evan A.
core   +1 more source

Unsteady and Inhomogeneous Turbulent Fluctuations around Isotropic Equilibrium

Atmosphere
Extracting statistics for turbulent flows directly from the Navier–Stokes equations poses a formidable challenge, particularly when dealing with unsteady or inhomogeneous flows.
Wouter J. T. Bos
doaj   +1 more source

Generalized self-similar spectrum and the effect of large-scale in decaying homogeneous isotropic turbulence

New Journal of Physics, 2018
In statistically stationary conditions, the turbulent energy spectrum in a high Reynolds number flow exhibits a k ^−5/3 (Kolmogorov) regime, with a faster decay at larger, dissipative wavenumbers.
Ping-Fan Yang, Alain Pumir, Haitao Xu
doaj   +1 more source

Simulation of fully resolved finite-size particles in a turbulent flow [PDF]

, 2013
In this study we are interested on the statistics of finite sized particles. A sustained homogeneous isotropic turbulence with particles is numerically simulated in order to obtain those ...
Brandle de Motta, Jorge, Climent, Éric, Estivalezes, Jean-Luc, Vincent, Stéphane   +3 more
core  

Wave turbulence: a solvable problem applied to the Navier–Stokes equations

Comptes Rendus. Physique
Wave turbulence and eddy turbulence are the two regimes that we may encounter in nature. The attention of fluid mechanics being mainly focused on incompressible hydrodynamics, it is usually the second regime that is treated in books, whereas waves are ...
Galtier, Sébastien
doaj   +1 more source

The energy decay in self-preserving isotropic turbulence revisited [PDF]

The assumption of self-preservation allows for an analytical determination of the energy decay in isotropic turbulence. Here, the self-preserving isotropic decay problem is analyzed, yielding a more complete picture of self-serving isotropic turbulence ...
Bernard, Peter S., Speziale, Charles G.
core   +1 more source