scholarly journals Calculations of longitudinal and transverse velocity structure functions using a vortex model of isotropic turbulence

1999 ◽  
Vol 11 (12) ◽  
pp. 3743-3748 ◽  
Author(s):  
Guowei He ◽  
Gary D. Doolen ◽  
Shiyi Chen
Keyword(s):  
Velocity Structure ◽  
Isotropic Turbulence ◽  
Transverse Velocity ◽  
Structure Functions ◽  
Vortex Model

Fourth-order moments of longitudinal- and transverse-velocity structure functions

1997 ◽  
Vol 37 (2) ◽  
pp. 85-90 ◽  
Author(s):  
R. A Antonia ◽  
M Ould-Rouis ◽  
Y Zhu ◽  
F Anselmet
Keyword(s):  
Fourth Order ◽  
Velocity Structure ◽  
Transverse Velocity ◽  
Structure Functions

Longitudinal and transverse structure functions in a turbulent round jet: effect of initial conditions and Reynolds number

2001 ◽  
Vol 436 ◽  
pp. 231-248 ◽  
Author(s):  
G. P. ROMANO ◽  
R. A. ANTONIA
Keyword(s):  
Reynolds Number ◽  
Large Scale ◽  
Velocity Structure ◽  
Initial Conditions ◽  
Transverse Velocity ◽  
Structure Functions ◽  
Small Scale ◽  
Round Jet ◽  
Jet Nozzle ◽  
The Difference

The difference between scaling exponents of longitudinal and transverse velocity structure functions in the far-field of a round jet is found to depend on the anisotropy of the flow. The effect of the large-scale anisotropy is assessed by considering different initial conditions at the jet nozzle, and hence different ratios of the longitudinal to transverse rms velocities. The effect of the Taylor microscale Reynolds number on the small scale anisotropy is also considered. Both effects account, to a large extent, for the observed difference between longitudinal and transverse exponents and the disagreement between previously published results of different authors. This disagreement also depends on the method used to determine the inertial range. An empirical description of the overall behaviour of the structure functions provides reasonable estimates for the longitudinal and transverse exponents, accounting reasonably well for the anisotropy of both large- and small-scale motions.

Scaling of mixed longitudinal-transverse velocity structure functions

2007 ◽  
Vol 79 (4) ◽  
pp. 44001 ◽  
Author(s):  
G Xu ◽  
R. A Antonia ◽  
S Rajagopalan
Keyword(s):  
Velocity Structure ◽  
Transverse Velocity ◽  
Structure Functions
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