Abstract
The unsteady thermocapillary flow and the free surface variation in a two-dimensional, thin liquid layer are investigated theoretically. The temperature is fixed at one end and sinusoidally varied at the other. By employing sine series expansions, the asymptotically oscillatory solutions of the u-velocity distribution and the free surface deformation are solved exactly. It is found that there exists an inversely proportional relation between τu, the u-velocity time scale and τs, the free-surface variation time scale, when the free surface has a maximum oscillation. Near the maximum oscillation conditions, the u-velocity may assume a uni-directional distribution across the layer depth. Furthermore, the deformation of the free surface becomes smaller when the gravity effect becomes more important.
Original language | English |
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Pages (from-to) | 629-640 |
Number of pages | 12 |
Journal | Acta Astronautica |
Volume | 21 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1990 Jan 1 |
All Science Journal Classification (ASJC) codes
- Aerospace Engineering