Flow separation  Problems and possibilities
Abstract
This paper is a discussion of those flow regions in which separation, occurring from sharp corners, is followed by reattachment, to form nominally twodimensional 'separation bubbles'. New measurements, taken with a pulsed wire anemometer, are reported for the separated region near the leading edge of a blunt flat plate. Mean streamlines are deduced from the velocity profiles and a comparison between the locations of the separation streamlines as measured and as predicted by a simple potential model supports the assumption that the flow separates tangentially from the plate leading edge and that it is essentially twodimensional. A simple momentum integral method is devised for use in separation bubbles and is tested for laminar flows in a sudden symmetric expansion. Reasonable agreement with more complicated calculation methods is obtained, suggesting that such simple methods have a useful place in predicting the mean flow fields of separation bubbles.
 Publication:

9th Australasian Fluid Mechanics Conference
 Pub Date:
 1987
 Bibcode:
 1987aafm.conf..276G
 Keywords:

 Blunt Bodies;
 Flat Plates;
 HotWire Anemometers;
 Leading Edges;
 Separated Flow;
 Velocity Distribution;
 Boundary Layers;
 Computational Fluid Dynamics;
 Drag Coefficients;
 Laminar Flow;
 Pressure Gradients;
 Reynolds Stress;
 Fluid Mechanics and Heat Transfer