scholarly journals Shear flow generation from the interaction of neoclassical and drift wave transport processes

1993 ◽  
Author(s):  
X.N. Su ◽  
P.N. Yushmanov ◽  
J.Q. Dong ◽  
W. Horton
Keyword(s):  
Shear Flow ◽  
Transport Processes ◽  
Drift Wave ◽  
Wave Transport ◽  
Flow Generation

scholarly journals Shear flow generation from the interaction of neoclassical and drift wave transport processes

1994 ◽  
Vol 1 (6) ◽  
pp. 1905-1917 ◽  
Author(s):  
X. N. Su ◽  
P. N. Yushmanov ◽  
J. Q. Dong ◽  
W. Horton
Keyword(s):  
Shear Flow ◽  
Transport Processes ◽  
Drift Wave ◽  
Wave Transport ◽  
Flow Generation

Reynolds stress and shear flow generation

2001 ◽  
Vol 43 (10) ◽  
pp. 1377-1395 ◽  
Author(s):  
S B Korsholm ◽  
P K Michelsen ◽  
V Naulin ◽  
J Juul Rasmussen ◽  
L Garcia ◽  
...  
Keyword(s):  
Shear Flow ◽  
Reynolds Stress ◽  
Flow Generation

Effect of Shear Direction Change on Shear-Flow-Transport Processes in Single Rough-Walled Rock Fractures

2020 ◽  
Vol 133 (3) ◽  
pp. 373-395
Author(s):  
Richeng Liu ◽  
Na Huang ◽  
Yujing Jiang ◽  
Guansheng Han ◽  
Hongwen Jing
Keyword(s):  
Shear Flow ◽  
Transport Processes ◽  
Rock Fractures ◽  
Shear Direction ◽  
Direction Change ◽  
Flow Transport

Shear flow and drift wave turbulence dynamics in a cylindrical plasma device

2010 ◽  
Vol 17 (3) ◽  
pp. 032302 ◽  
Author(s):  
Z. Yan ◽  
G. R. Tynan ◽  
C. Holland ◽  
M. Xu ◽  
S. H. Müller ◽  
...  
Keyword(s):  
Shear Flow ◽  
Wave Turbulence ◽  
Drift Wave Turbulence ◽  
Cylindrical Plasma ◽  
Drift Wave ◽  
Plasma Device

Shear flow generation by drift waves revisited

2001 ◽  
Vol 8 (2) ◽  
pp. 459-462 ◽  
Author(s):  
P. N. Guzdar ◽  
R. G. Kleva ◽  
Liu Chen
Keyword(s):  
Shear Flow ◽  
Drift Waves ◽  
Flow Generation

scholarly journals A theory of non-local linear drift wave transport

2011 ◽  
Vol 18 (6) ◽  
pp. 062106 ◽  
Author(s):  
S. Moradi ◽  
J. Anderson ◽  
B. Weyssow
Keyword(s):  
Linear Drift ◽  
Drift Wave ◽  
Local Linear ◽  
Wave Transport ◽  
Non Local

Zonal flows near marginal stability in drift wave transport

2015 ◽  
Vol 90 (6) ◽  
pp. 065604 ◽  
Author(s):  
G Q Wang ◽  
J Ma ◽  
J Weiland
Keyword(s):  
Marginal Stability ◽  
Zonal Flows ◽  
Drift Wave ◽  
Wave Transport

Transport of passive scalar in turbulent shear flow under a clean or surfactant-contaminated free surface

2011 ◽  
Vol 670 ◽  
pp. 527-557 ◽  
Author(s):  
HAMID R. KHAKPOUR ◽  
LIAN SHEN ◽  
DICK K. P. YUE
Keyword(s):  
Free Surface ◽  
Shear Flow ◽  
Solid Wall ◽  
Surface Flux ◽  
Scalar Fields ◽  
Transport Processes ◽  
Turbulent Shear ◽  
Turbulent Shear Flow ◽  
Scalar Flux ◽  
Conditional Averaging

Direct numerical simulation is performed to study the turbulent transport of passive scalars near clean and surfactant-contaminated free surfaces. As a canonical problem, a turbulent shear flow interacting with a flat free surface is considered, with a focus on the effect of splats and anti-splats on the scalar transport processes. Using conditional averaging of strong surface flux events, it is shown that these are associated with coherent hairpin vortex structures emerging from the shear flow. The upwelling at the splat side of the oblique hairpin vortices greatly enhances the scalar surface flux. In the presence of surfactants, the splats at the surface are suppressed by the surface tension gradients caused by spatial variation of surfactant concentration; as a result, scalar flux is reduced. Conditional averaging of weak surface flux events shows that these are caused by anti-splats with which surface-connected vortices are often associated. When surfactants are present, the downdraught transport at the surface-connected vortices is weakened. Turbulence statistics of the velocity and scalar fields are performed in terms of mean and fluctuation profiles, scalar flux, turbulent diffusivity and scalar variance budget. Using surface layer quantification based on an analytical similarity solution of the mean shear flow, it is shown that the depth of the scalar statistics variation is scaled on the basis of the Schmidt number. In the presence of surfactants, the scalar statistics have the characteristics of those near a solid wall in contrast to those near a clean surface, which leads to thickened scalar boundary layer and reduced surface flux.

Theory of shear flow effects on long‐wavelength drift wave turbulence

1992 ◽  
Vol 4 (10) ◽  
pp. 3115-3131 ◽  
Author(s):  
B. A. Carreras ◽  
K. Sidikman ◽  
P. H. Diamond ◽  
P. W. Terry ◽  
L. Garcia
Keyword(s):  
Shear Flow ◽  
Wave Turbulence ◽  
Long Wavelength ◽  
Drift Wave Turbulence ◽  
Drift Wave ◽  
Flow Effects
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