Abstract
This paper presents a separated flow model of annular upward flow in a vertical narrow annular channel with bilateral heating. The theoretical model is based on fundamental conservation principles: the mass, momentum and energy conservation equations of liquid films and the momentum conservation equation of vapor core. Through numerically solving the equations, liquid film thickness, radial velocity and temperature distribution in liquid films, heat transfer coefficient of inner and outer tubes and axial pressure gradient are obtained. The predicted results of heat transfer coefficients and axial pressure gradient are compared with the experimental data and good agreements between them are found.
| Original language | English |
|---|---|
| Pages (from-to) | 1-11 |
| Number of pages | 11 |
| Journal | Journal of Nuclear Science and Technology |
| Volume | 40 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2003 |
Keywords
- Annular flow
- Bilateral heating
- Boiling heat transfer
- Comparative evaluations
- Narrow annular channel
- Temperature dependence
- Temperature distribution
