The structure of turbulence in axisymmetric and flat plate flows
Abstract
On the basis of data obtained by Perry and Abell (1977) in pipes, it was deduced that the broad band turbulence intensity profiles must possess a logarithmic singularity. Attention is given to the complete set of equations for the various components of the turbulence intensity, taking into account tests of the validity of the equations both in pipes and in boundary layers. A rough flat plate was tested in a zero pressure gradient with experimental conditions similar to those considered by Watmuff et al. (1980). It is concluded that the simple and popular wall similarity law does not appear to be valid. A more complex behavior is evident and the lack of similarity must be due to large scale inactive motions or nonuniversal motions.
- Publication:
-
7th Australasian Conference on Hydraulics and Fluid Mechanics
- Pub Date:
- 1981
- Bibcode:
- 1981hfm..conf..172H
- Keywords:
-
- Axisymmetric Flow;
- Flat Plates;
- Flow Equations;
- Pipe Flow;
- Shear Flow;
- Turbulent Boundary Layer;
- Flow Velocity;
- Pressure Gradients;
- Similarity Theorem;
- Surface Roughness;
- Turbulent Flow;
- Wall Flow;
- Fluid Mechanics and Heat Transfer