Numerical study of heat and mass transfer during evaporation of a turbulent binary liquid film
This paper deals with a computational study for analysing heat and mass exchanges in the evaporation of a turbulent binary liquid film (water-ethanol and water-methanol) along a vertical tube. The film is in co-current with the dry air and the tube wall is subjected to a uniform heat flux....
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
VINCA Institute of Nuclear Sciences
2015-01-01
|
| Series: | Thermal Science |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0354-9836/2015/0354-98361300025K.pdf |
| Summary: | This paper deals with a computational study for analysing heat and mass
exchanges in the evaporation of a turbulent binary liquid film (water-ethanol
and water-methanol) along a vertical tube. The film is in co-current with the
dry air and the tube wall is subjected to a uniform heat flux. The effect of
gas-liquid phase coupling, variable thermophysical properties and film
vaporization are considered in the analysis. The numerical method applied
solves the coupled governing equations together with the boundary and
interfacial conditions. The algebraic systems of equations obtained are
solved using the Thomas algorithm. The results concern the effects of the
inlet liquid Reynolds number and inlet film composition on the intensity of
heat and mass transfer. In this study, results obtained show that heat
transferred through the latent mode is more pronounced when the concentration
of volatile components is higher in the liquid mixture .The comparisons of
wall temperature and accumulated mass evaporation rate with the literature
results are in good agreement. |
|---|---|
| ISSN: | 0354-9836 2334-7163 |