Experimental investigation of the structure of near-wall turbulence and viscous sublayer
Abstract
Near-wall turbulence in the immediate vicinity of the wall was studied by measuring velocity and temperature pulsations with a stroboscopic visualization technique enabling simultaneous determination of all three components of the instantaneous velocity vector in the region of interest. The contribution of near-wall flows to the Reynolds shear stresses are considered. The main statistical characteristics of random processes have been obtained, as well as autocorrelation and spectral functions at various distances from the surface of heating. Analysis of the data shows that in a viscous sublayer the spectral density distribution is essentially independent of the distance from the wall.
- Publication:
-
Symposium on Turbulent Shear Flows
- Pub Date:
- 1977
- Bibcode:
- 1977tsf.....1Q..17K
- Keywords:
-
- Reynolds Stress;
- Temperature Measurement;
- Turbulent Boundary Layer;
- Viscous Flow;
- Wall Flow;
- Water Flow;
- Channel Flow;
- Correlation Coefficients;
- Flow Velocity;
- Flow Visualization;
- Photographic Recording;
- Shear Stress;
- Fluid Mechanics and Heat Transfer