Calculation of three-dimensional instability modes in a Blasius boundary layer
Abstract
Transition from laminar to turbulent flow was investigated computationally for downstream flow. Wortmann's qualitative model which is a three dimensional structure composed of the basic flow and longitudinal counterrotating, overlapping vortex sheets inclined downstream was tested. The relation between eigenvalues for two dimensional and three dimensional disturbances was established. Numerical calculations of the spanwise component of the fluctuating velocity agree fairly well with Wortmann's measurements and substantiate the model.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- May 1981
- Bibcode:
- 1981STIN...8215377M
- Keywords:
-
- Blasius Flow;
- Boundary Layer Transition;
- Laminar Boundary Layer;
- Three Dimensional Flow;
- Eigenvalues;
- Mathematical Models;
- Orr-Sommerfeld Equations;
- Reynolds Number;
- Turbulent Flow;
- Vortex Sheets;
- Fluid Mechanics and Heat Transfer