Dynamics of nonlinear baroclinic Ekman boundary layer

1986 ◽  
Vol 3 (4) ◽  
pp. 424-431 ◽  
Author(s):  
Liu Qinyu ◽  
Qin Zenghao
Keyword(s):  
Boundary Layer ◽  
Ekman Boundary Layer

scholarly journals Heat transfer in rotating Rayleigh–Bénard convection with rough plates

2017 ◽  
Vol 830 ◽  
Author(s):  
Pranav Joshi ◽  
Hadi Rajaei ◽  
Rudie P. J. Kunnen ◽  
Herman J. H. Clercx
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Ekman Layer ◽  
Ekman Pumping ◽  
Ekman Boundary Layer ◽  
Bénard Convection ◽  
Roughness Elements ◽  
Benard Convection ◽  
Rayleigh Benard Convection ◽  
Rayleigh Benard

This experimental study focuses on the effect of horizontal boundaries with pyramid-shaped roughness elements on the heat transfer in rotating Rayleigh–Bénard convection. It is shown that the Ekman pumping mechanism, which is responsible for the heat transfer enhancement under rotation in the case of smooth top and bottom surfaces, is unaffected by the roughness as long as the Ekman layer thickness $\unicode[STIX]{x1D6FF}_{E}$ is significantly larger than the roughness height $k$. As the rotation rate increases, and thus $\unicode[STIX]{x1D6FF}_{E}$ decreases, the roughness elements penetrate the radially inward flow in the interior of the Ekman boundary layer that feeds the columnar Ekman vortices. This perturbation generates additional thermal disturbances which are found to increase the heat transfer efficiency even further. However, when $\unicode[STIX]{x1D6FF}_{E}\approx k$, the Ekman boundary layer is strongly perturbed by the roughness elements and the Ekman pumping mechanism is suppressed. The results suggest that the Ekman pumping is re-established for $\unicode[STIX]{x1D6FF}_{E}\ll k$ as the faces of the pyramidal roughness elements then act locally as a sloping boundary on which an Ekman layer can be formed.

Diagnostic and prognostic equations for the depth of the stably stratified Ekman boundary layer

2002 ◽  
Vol 128 (579) ◽  
pp. 25-46 ◽  
Author(s):  
Sergej Zilitinkevich ◽  
Alexander Baklanov ◽  
Jutta Rost ◽  
Ann-Sofi Smedman ◽  
Vasiliy Lykosov ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Ekman Boundary Layer

Ekman boundary layer mass transfer mechanism of free sink vortex

2020 ◽  
Vol 150 ◽  
pp. 119250 ◽  
Author(s):  
Dapeng Tan ◽  
Lin Li ◽  
Zichao Yin ◽  
Daifeng Li ◽  
Yinlong Zhu ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Mass Transfer ◽  
Transfer Mechanism ◽  
Ekman Boundary Layer ◽  
Mass Transfer Mechanism ◽  
Sink Vortex

An analysis of the stability of the compressible Ekman boundary layer

1984 ◽  
Vol 27 (12) ◽  
pp. 2808 ◽  
Author(s):  
John R. Spall ◽  
Houston G. Wood
Keyword(s):  
Boundary Layer ◽  
Ekman Boundary Layer ◽  
The Stability
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