Abstract
In this paper, visualization experiments were carried out to study bubble dynamics at the outlet of capillary tube in the flowing liquid. We discussed the influence of the wettability of tube wall, liquid velocity and gas flux on the growth and departure of bubbles. Our results show that due to the shear stress' effect, a larger liquid speed results in the bubbles with a shorter departure time and a smaller departure diameter. Meanwhile, a larger gas flux accelerates the bubble's growth and shortens its departure time. In addition, our experiment also reveals that the change of the wettablity of tube wall causes the contact line to move in the radial direction.
| Original language | English |
|---|---|
| Pages (from-to) | 1541-1544 |
| Number of pages | 4 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 29 |
| Issue number | 9 |
| Publication status | Published - Sept 2008 |
| Externally published | Yes |
Keywords
- Capillary tube
- Growth and departure characteristics of bubbles
- Visualization experiment
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanical Engineering