Primary instability mechanisms on the magnetohydrodynamic boundary layer flow over a rotating disk subject to a uniform radial flow

2009 ◽  
Vol 21 (7) ◽  
pp. 074103 ◽  
Author(s):  
M. Turkyilmazoglu
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Radial Flow ◽  
Rotating Disk ◽  
Layer Flow ◽  
Primary Instability

EXPERIMENTAL INVESTIGATION OF FLOW RESPONSE TO STATIONARY DISTURBANCE IN ROTATING-DISK FLOW

2019 ◽  
Vol XVI (2) ◽  
pp. 13-22
Author(s):  
Muhammad Ehtisham Siddiqui
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Three Dimensional ◽  
Rotating Disk ◽  
Careful Analysis ◽  
Laboratory Frame ◽  
Transition To Turbulence ◽  
Turbulent Regime ◽  
Mean Velocity ◽  
Layer Flow

Three-dimensional boundary-layer flow is well known for its abrupt and sharp transition from laminar to turbulent regime. The presented study is a first attempt to achieve the target of delaying the natural transition to turbulence. The behaviour of two different shaped and sized stationary disturbances (in the laboratory frame) on the rotating-disk boundary layer flow is investigated. These disturbances are placed at dimensionless radial location (Rf = 340) which lies within the convectively unstable zone over a rotating-disk. Mean velocity profiles were measured using constant-temperature hot-wire anemometry. By careful analysis of experimental data, the instability of these disturbance wakes and its estimated orientation within the boundary-layer were investigated.

scholarly journals A new way to describe the transition characteristics of a rotating-disk boundary-layer flow

2012 ◽  
Vol 24 (3) ◽  
pp. 031701 ◽  
Author(s):  
Shintaro Imayama ◽  
P. Henrik Alfredsson ◽  
R. J. Lingwood
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Rotating Disk ◽  
Layer Flow

scholarly journals The centrifugal instability of the boundary-layer flow over slender rotating cones

2014 ◽  
Vol 755 ◽  
pp. 274-293 ◽  
Author(s):  
Z. Hussain ◽  
S. J. Garrett ◽  
S. O. Stephen
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Rotating Disk ◽  
Alternative Formulation ◽  
Centrifugal Instability ◽  
Half Angle ◽  
Layer Flow ◽  
The Stability ◽  
Experimental And Theoretical Studies ◽  
Numerical Approaches

AbstractExisting experimental and theoretical studies are discussed which lead to the clear hypothesis of a hitherto unidentified convective instability mode that dominates within the boundary-layer flow over slender rotating cones. The mode manifests as Görtler-type counter-rotating spiral vortices, indicative of a centrifugal mechanism. Although a formulation consistent with the classic rotating-disk problem has been successful in predicting the stability characteristics over broad cones, it is unable to identify such a centrifugal mode as the half-angle is reduced. An alternative formulation is developed and the governing equations solved using both short-wavelength asymptotic and numerical approaches to independently identify the centrifugal mode.

Effects of the Orbital Motion on the Velocity Field of Boundary Layer Flow over a Rotating Disk

2016 ◽  
Vol 2016 (0) ◽  
pp. G0500605
Author(s):  
Takaomi UTATSU ◽  
Yasuhiro OKUMURA ◽  
Mizue MUNEKATA ◽  
Hiroyuki YOSHIKAWA
Keyword(s):  
Boundary Layer ◽  
Velocity Field ◽  
Boundary Layer Flow ◽  
Orbital Motion ◽  
Rotating Disk ◽  
Layer Flow

G0500801 Effects of Orbital Velocity on the Boundary Layer Flow over a Rotating Disk under Orbital Motion

2015 ◽  
Vol 2015 (0) ◽  
pp. _G0500801--_G0500801-
Author(s):  
Yasuhiro OKUMURA ◽  
Mizue MUNEKATA ◽  
Hiroyuki YOSHIKAWA ◽  
Kazuyuki KUDO
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Orbital Motion ◽  
Rotating Disk ◽  
Orbital Velocity ◽  
Layer Flow

413 Effects of the Orbital Motion on the Boundary Layer Flow over a Rotating Disk under Orbital Motion at High Reynolds Number

2015 ◽  
Vol 2015.68 (0) ◽  
pp. 153-154
Author(s):  
Yasuhiro OKUMURA ◽  
Shinnosuke FUJIKAWA ◽  
Mizue MUNEKATA ◽  
Hiroyuki YOSHIKAWA ◽  
Kazuyuki KUDO
Keyword(s):  
Boundary Layer ◽  
Reynolds Number ◽  
Boundary Layer Flow ◽  
High Reynolds Number ◽  
Orbital Motion ◽  
Rotating Disk ◽  
Layer Flow ◽  
High Reynolds
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