Abstract
The present work relates to dilute spray systems where interaction between droplets or bubbles does not take place. The analysis of a single droplet-bubble projects in such cases on the whole spray system. Photographs of colored droplets evaporating into colorless bubbles have illustrated splashing of the liquid inside the bubble, and the non-regular instantaneously varying shapes of the evaporating bubble. Close to the spray nozzle the droplet accelerates from rest towards its terminal velocity. Further up, as the fraction of vapor increases the bubble accelerates due to its decreasing density. Finally, the shape distortion and the large drag balances the reduced density, and a constant velocity is reached. Integration of the velocity yields the bubble path and the height needed for complete evaporation.
| Original language | English |
|---|---|
| Pages (from-to) | 537-541 |
| Number of pages | 5 |
| Journal | American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD |
| Volume | 106 |
| State | Published - 1989 |
| Externally published | Yes |
| Event | Heat Transfer Phenomena in Radiation, Combustion, and Fires - Philadelphia, PA, USA Duration: 6 Aug 1989 → 9 Aug 1989 |