A model for bursting of near wall vortical structures in boundary layers
Abstract
In the last decade, much effort has been devoted to the understanding of near wall turbulence, both through experimental and numerical observations. Different scenarios have been proposed, but a broad consensus on a basic model for the near wall events has still not been achieved. A simple numerical model for some of the events occurring during the bursting phenomenon is presented. In particular the behavior of longitudinal vortices as they are brought near a wall by an x-dependent external shear, which is the near wall equivalent of a plane strain is studied. The effect of the interaction on the local wall stress is studied, and the distributions of turbulent stresses to analyze the zones of maximum production in the transversal y-z plane are calculated.
- Publication:
-
8th Symposium on Turbulent Shear Flows, Volume 2
- Pub Date:
- 1991
- Bibcode:
- 1991tsf.....2...28O
- Keywords:
-
- Computational Fluid Dynamics;
- Flow Geometry;
- Mathematical Models;
- Turbulent Boundary Layer;
- Vortices;
- Wall Flow;
- Flow Velocity;
- Reynolds Number;
- Two Dimensional Models;
- Fluid Mechanics and Heat Transfer