Oscillatory thermocapillary convection
Abstract
We study thermocapillary and buoyant thermocapillary convection in rectangular cavities with aspect ratio A = 4 and Pr = 0.015. Two separate problems are considered. The first is combined buoyant thermocapillary convection with a nondeforming interface. We establish neutral curves for transition to oscillatory convection in the Re-Gr plane. It is shown that while pure buoyant convection exhibits oscillatory behavior for Gr is greater than Gr(sub cr) (where Gr(sub cr) is defined for the pure buoyant problem), pure thermocapillary convection is steady within the range of parameters tested. In the second problem, we consider the influence of surface deformation on the pure thermocapillary problem. For the range of parameters considered, thermocapillary convection remained steady.
- Publication:
-
2nd Microgravity Fluid Physics Conference
- Pub Date:
- August 1994
- Bibcode:
- 1994mfp..conf...27M
- Keywords:
-
- Boundary Layer Transition;
- Buoyancy;
- Capillary Flow;
- Cavities;
- Convection;
- Flow Stability;
- Fluid Dynamics;
- Grashof Number;
- Microgravity;
- Microgravity Applications;
- Oscillations;
- Aspect Ratio;
- Asymptotic Methods;
- Crystal Growth;
- Deformation;
- Prandtl Number;
- Temperature Gradients;
- Fluid Mechanics and Heat Transfer