Correlation functions of temperature and velocity fluctuations in a turbulent atmosphere

2006 ◽  
Vol 119 (5) ◽  
pp. 3264-3264
Author(s):  
Vladimir E. Ostashev ◽  
Sergey N. Vecherin ◽  
D. Keith Wilson ◽  
Sandra L. Collier
Keyword(s):  
Correlation Functions ◽  
Turbulent Atmosphere ◽  
Velocity Fluctuations

scholarly journals Velocity statistics inside coherent vortices generated by the inverse cascade of 2-D turbulence

2016 ◽  
Vol 809 ◽  
Author(s):  
I. V. Kolokolov ◽  
V. V. Lebedev
Keyword(s):  
Velocity Profile ◽  
Structure Function ◽  
Correlation Functions ◽  
Two Dimensional ◽  
Strong Anisotropy ◽  
Velocity Fluctuations ◽  
Inverse Cascade ◽  
Velocity Statistics ◽  
Flow Fluctuations ◽  
Coherent Vortices

We analyse velocity fluctuations inside coherent vortices generated as a result of the inverse cascade in the two-dimensional (2-D) turbulence in a finite box. As we demonstrated in Kolokolov & Lebedev (Phys. Rev. E, vol. 93, 2016, 033104), the universal velocity profile, established in Laurie et al. (Phys. Rev. Lett., vol. 113, 2014, 254503), corresponds to the passive regime of the flow fluctuations. This property enables one to calculate correlation functions of the velocity fluctuations in the universal region. We present the results of the calculations that demonstrate a non-trivial scaling of the structure function. In addition the calculations reveal strong anisotropy of the structure function.

scholarly journals Lack of Plasma-like Screening Mechanism in Sedimentation of a Non-Brownian Suspension

Symmetry ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 63
Author(s):  
Paweł Sznajder ◽  
Bogdan Cichocki ◽  
Maria Ekiel-Jeżewska
Keyword(s):  
Long Range ◽  
Stationary State ◽  
Liouville Equation ◽  
Correlation Functions ◽  
Bbgky Hierarchy ◽  
Uniform Structure ◽  
Translational Symmetry ◽  
Velocity Fluctuations

We investigate qualitatively a uniform non-Brownian sedimenting suspension in a stationary state. As a base of our analysis we take the BBGKY hierarchy derived from the Liouville equation. We then show that assumption of the plasma-like screening relations can cancel some long-range terms in the hierarchy but it does not provide integrable solutions for correlation functions. This suggests breaking the translational symmetry of the system. Therefore a non-uniform structure can develop to suppress velocity fluctuations and make the range of correlations finite.

scholarly journals Two-point correlation in wall turbulence according to the attached-eddy hypothesis

2017 ◽  
Vol 821 ◽  
pp. 343-357 ◽  
Author(s):  
Hideaki Mouri
Keyword(s):  
Energy Dissipation ◽  
Momentum Transfer ◽  
Phenomenological Model ◽  
Correlation Functions ◽  
Wall Turbulence ◽  
Energy Spectra ◽  
Velocity Fluctuations ◽  
Point Correlation ◽  
Stress Layer ◽  
Additional Assumptions

For the constant-stress layer of wall turbulence, two-point correlations of velocity fluctuations are studied theoretically by using the attached-eddy hypothesis, i.e. a phenomenological model of a random superposition of energy-containing eddies that are attached to the wall. While previous studies had invoked additional assumptions, we focus on the minimum assumptions of the hypothesis to derive the most general forms of the correlation functions. They would allow us to use or assess the hypothesis without any effect of those additional assumptions. We also study the energy spectra and the two-point correlations of the rate of momentum transfer and of the rate of energy dissipation.

Correlation functions of the light intensity in a turbulent atmosphere

1974 ◽  
Vol 17 (1) ◽  
pp. 120-122 ◽  
Author(s):  
M. E. Gracheva ◽  
A. S. Gurvich ◽  
A. S. Khrupin
Keyword(s):  
Light Intensity ◽  
Correlation Functions ◽  
Turbulent Atmosphere

Correlation functions in the twisted N = 4 model

1997 ◽  
Vol 508 (1-2) ◽  
pp. 468-482
Author(s):  
W Pei
Keyword(s):  
Correlation Functions

CROSS-CORRELATION FUNCTIONS OF THE FIELD EMISSION FLUCTUATIONS WITH SLIT PROBED REGIONS

1989 ◽  
Vol 50 (C8) ◽  
pp. C8-97-C8-102 ◽  
Author(s):  
J. BEBEN ◽  
CH. KLEINT ◽  
R. MECLEWSKI
Keyword(s):  
Field Emission ◽  
Correlation Functions ◽  
Cross Correlation
Sign in / Sign up

Export Citation Format

Share Document