抄録
The experimental study in vertical upward driven bubbly pipe flow with void fractions of 0.5% and 1.0% is conducted to elucidate the effect of dispersed bubble size on turbulence modification. Liquid phase velocity is measured by particle image velocimetry with fluorescent tracer particles (PIV/LIF). Bubble size and velocity are estimated from the bubble image observed by a projected shadow image technique. Bubbles strongly accumulate near the wall which accelerate the liquid phase. The high concentration of bubbles in the vicinity of the wall induces a reduction of the fluctuation velocity intensity of the liquid. The effect of bubble-induced turbulence on the global pipe flow structure was investigated by the turbulence energy production and dissipation, estimated from the experiment data, and local vortical structure around the bubbles.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 481-488 |
| ページ数 | 8 |
| ジャーナル | International Journal of Heat and Fluid Flow |
| 巻 | 25 |
| 号 | 3 |
| DOI | |
| 出版ステータス | Published - 2004 6月 |
ASJC Scopus subject areas
- 凝縮系物理学
- 機械工学
- 流体および伝熱