On the instability of Ekman boundary‐layer flow over a rough disk with a wavy surface profile

2020 ◽  
Author(s):  
Burhan Alveroğlu
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Surface Profile ◽  
Wavy Surface ◽  
Ekman Boundary Layer ◽  
Layer Flow

Axisymmetric and three-dimensional instabilities in an Ekman boundary layer flow

2001 ◽  
Vol 22 (1) ◽  
pp. 82-93 ◽  
Author(s):  
E. Serre ◽  
S. Hugues ◽  
E. Crespo del Arco ◽  
A. Randriamampianina ◽  
P. Bontoux
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Three Dimensional ◽  
Ekman Boundary Layer ◽  
Layer Flow

A Note on Oscillatory Couette Flow in a Rotating System

1994 ◽  
Vol 61 (1) ◽  
pp. 208-209 ◽  
Author(s):  
R. Ganapathy
Keyword(s):  
Boundary Layer ◽  
Couette Flow ◽  
Relative Motion ◽  
Boundary Layer Flow ◽  
Alternative Solution ◽  
Parallel Plates ◽  
Rotating System ◽  
Rotating Systems ◽  
Ekman Boundary Layer ◽  
Layer Flow

An alternative solution is proposed for the oscillatory Ekman boundary layer flow bounded by two parallel plates in relative motion (Muzumder, 1991). The solution brings out among other things, the phenomenon of resonance which is of importance in rotating systems.

Stability of compressible Ekman boundary-layer flow

1984 ◽  
Vol 147 (-1) ◽  
pp. 159 ◽  
Author(s):  
Hans Moberg ◽  
Lennart S. Hultgren ◽  
Fritz H. Bark
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Ekman Boundary Layer ◽  
Layer Flow

scholarly journals Visualization of pre-set vortices in boundary layer flow over wavy surface in rectangular channel

2014 ◽  
Vol 18 (4) ◽  
pp. 669-677 ◽  
Author(s):  
A. C. Budiman ◽  
H. Mitsudharmadi ◽  
Y. Bouremel ◽  
S. H. Winoto ◽  
H. T. Low
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Rectangular Channel ◽  
Wavy Surface ◽  
Layer Flow

An experimental study of the instability of the laminar Ekman boundary layer

1963 ◽  
Vol 15 (4) ◽  
pp. 560-576 ◽  
Author(s):  
Alan J. Faller
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Rotating Disk ◽  
Homogeneous Fluid ◽  
Viscous Boundary Layer ◽  
Ekman Boundary Layer ◽  
Characteristic Angle ◽  
Layer Flow ◽  
The Stability ◽  
Viscous Boundary

This study concerns the stability of the steady laminar boundary-layer flow of a homogeneous fluid which occurs in a rotating system when the relative flow is slow compared to the basic speed of rotation. Such a flow is called an Ekman boundary-layer flow after V. W. Ekman who considered the theory of such flows with application to the wind-induced drift of the surface waters of the ocean.Ekman flow was produced in a large cylindrical rotating tank by withdrawing water from the centre and introducing it at the rim. This created a steady-state symmetrical vortex in which the flow from the rim to the centre took place entirely in the shallow viscous boundary layer at the bottom. This boundary-layer flow became unstable above the critical Reynolds number$Re_c = vD|v = 125 \pm 5$wherevis the tangential speed of flow,$D = (v| \Omega)^{\frac {1}{2}}$is the characteristic depth of the boundary layer,vis the kinematic viscosity, and Ω is the basic speed of rotation. The initial instability was similar to that which occurs in the boundary layer on a rotating disk, having a banded form with a characteristic angle to the basic flow and with the band spacing proportional to the depth of the boundary layer.

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