The structure of an axisymmetric plane turbulent wall jet
Abstract
The flow of a turbulent axisymmetric wall jet is investigated. It is found that it tends rapidly to similarity. Special attention has been devoted to the effect of the entrainment of external flow into the turbulent region of the jet. This phenomenon appears to be particularly important in this configuration and is responsible for the existence of intermittent flow deep into the boundary layers part as put in evidence by various converging experimental results. An analysis of the joint probability density function of the longitudinal and normal components of the turbulent velocity fluctuation shows that the corresponding most probable value does not coincide with the mean value. This leads to the presumption that there exists a most probable pattern of streamlines, different from the mean pattern, which is related to the entrainment of external flow inside the turbulent region.
- Publication:
-
Structure of Complex Turbulent Shear Flow
- Pub Date:
- 1983
- Bibcode:
- 1983scts.proc..251C
- Keywords:
-
- Axisymmetric Flow;
- Turbulent Jets;
- Wall Jets;
- Entrainment;
- Probability Density Functions;
- Reynolds Stress;
- Shear Stress;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer