Effect of destabilizing heating on Goertler vortices
Abstract
Experimental investigations of the effect of destabilizing heating on the vortex instability in a laminar boundary-layer flow of air along a concave surface are reported. The ranges of the parameters studied herein are Gr (Grashof number) from 0 to 70 and G (Goertler number) from 0.46 to 9.0. The wavelength of the vortices remains unchanged with heating, but the strength of the vortices is enhanced by heating. The amplitude of the vortices increases almost exponentially with the combined parameter sq rt of (G-squared + f Gr), where f is found to be between 0.3 and 0.4, until the nonlinear effects become important. In the nonlinear region, the original sinusoidal waveform of the vortices becomes distorted, and they meander in the lateral direction.
- Publication:
-
ASME Journal of Heat Transfer
- Pub Date:
- November 1985
- Bibcode:
- 1985ATJHT.107..877K
- Keywords:
-
- Boundary Layer Flow;
- Boundary Layer Stability;
- Goertler Instability;
- Heating;
- Laminar Boundary Layer;
- Vortices;
- Concavity;
- Microgravity Applications;
- Space Commercialization;
- Temperature Profiles;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer