Abstract
Measurements of wave characteristics have been conducted in a 0.0762 m internal diameter (ID) pipe at inclinations of 0°, 10°, 20°, 45°, 60°, 75°, and 90° from horizontal. Wave celerity and frequency are very strongly dependent on modified Lockhart-Martinelli parameter, X*, and the inclination angle. Wave amplitude increases with increasing liquid film thickness at the bottom of the pipe. Wave amplitude depends on liquid film thickness for any pipe diameter, surface tension, and viscosity. Strouhal number (dimensionless wave frequency) decreases with increasing X*. Effect of pipe diameter, surface tension, and liquid viscosity on the liquid film Reynolds number, Re LF, was studied. Re LF variation with X* is not sensitive to the surface tension and less sensitive to the pipe diameter. However, Re LF is very sensitive to the viscosity of the flowing liquid. Correlations for wave celerity, amplitude, frequency, and liquid film Reynolds number are proposed.
| Original language | English |
|---|---|
| Pages (from-to) | 1018-1029 |
| Number of pages | 12 |
| Journal | AIChE Journal |
| Volume | 58 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2012 |
Keywords
- Annular flow
- Fluid mechanics
- Multiphase flow
- Pipe inclination
- Wave characteristics
ASJC Scopus subject areas
- Biotechnology
- Environmental Engineering
- General Chemical Engineering