Three-dimensional visualization of destruction events of turbulent momentum transfer in a plane jet

2019 ◽  
Vol 31 (10) ◽  
pp. 105114
Author(s):  
Mamoru Takahashi ◽  
Koji Iwano ◽  
Yasuhiko Sakai ◽  
Yasumasa Ito
Keyword(s):  
Momentum Transfer ◽  
Three Dimensional ◽  
Turbulent Momentum ◽  
Plane Jet

Momentum Transfer in Turbulent Separated Flow Past a Rectangular Cavity

1966 ◽  
Vol 33 (3) ◽  
pp. 641-646 ◽  
Author(s):  
R. L. Haugen ◽  
A. M. Dhanak
Keyword(s):  
Boundary Layer ◽  
Momentum Transfer ◽  
Separated Flow ◽  
Flow Region ◽  
Eddy Diffusion ◽  
Rectangular Cavity ◽  
Width Ratio ◽  
Transfer Rates ◽  
Turbulent Momentum ◽  
Vortex Patterns

This paper presents results of an analytical and experimental investigation aimed at describing the turbulent momentum transfer mechanism in the separated-flow region of a rectangular cavity facing an oncoming turbulent boundary layer. A flow model of the mixing region in the slot postulated on the basis of eddy diffusion in free jets gives values of velocities and drag in good agreement with the measurements. The results further point to the significant effects exerted by the oncoming boundary layer on transfer rates from the slot. Flow-visualization pictures show some interesting vortex patterns inside the cavity when height-to-width ratio is varied between values of 1 and 3.

Spectral measurements of turbulent momentum transfer in fully developed pipe flow

1973 ◽  
Vol 61 (1) ◽  
pp. 173-186 ◽  
Author(s):  
K. Bremhorst ◽  
T. B. Walker
Keyword(s):  
Momentum Transfer ◽  
Pipe Flow ◽  
Negative Transfer ◽  
Turbulent Heat Transfer ◽  
Wall Region ◽  
Turbulent Heat ◽  
Spectral Measurements ◽  
Transfer Processes ◽  
Spectral Components ◽  
Turbulent Momentum

Measurements of the spectral components of turbulent momentum transfer for fully developed pipe flow are presented. The results indicate that near the wall (y+ < 15) two types of momentum transfer processes occur. A net positive transfer takes place in the higher frequency range of the energy-containing part of the turbulence spectrum whereas a net negative transfer returns low momentum to the wall region at the lower end of the spectrum. Examination of the turbulence at various y+ shows that the significant features of the turbulence spectra scale on frequency at any given Reynolds number, thus leading to an interpretation of the flow structure which is consistent with the hydrogen-bubble visualization data of Runstadler, Kline & Reynolds (1963). The results are consistent with a flow model in which disturbances extend from the sublayer to the core of the flow. Recent turbulent heat transfer measurements are also interpreted successfully by this model.

Three-dimensional study of turbulent flow characteristics of an offset plane jet with variable density

2015 ◽  
Vol 52 (11) ◽  
pp. 2327-2343 ◽  
Author(s):  
Ali Assoudi ◽  
Sabra Habli ◽  
Nejla Mahjoub Saïd ◽  
Hervé Bournot ◽  
Georges Le Palec
Keyword(s):  
Turbulent Flow ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Variable Density ◽  
Plane Jet

Turbulent momentum transfer in rough pipes

1971 ◽  
Vol 26 (5) ◽  
pp. 685-692 ◽  
Author(s):  
S.G. Dunn ◽  
J.W. Smith
Keyword(s):  
Momentum Transfer ◽  
Turbulent Momentum

On coherent structures in a three-dimensional transitional plane jet

2008 ◽  
Vol 51 (4) ◽  
pp. 386-396 ◽  
Author(s):  
Kun Luo ◽  
Jie Yan ◽  
JianRen Fan ◽  
KeFa Cen
Keyword(s):  
Coherent Structures ◽  
Three Dimensional ◽  
Plane Jet
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