Numerical modeling of steam condensation in vertical channel in presence of noncondensable gas
| Autor: | Abdelwahid Azzi, Mohamed Aboudou Kassim, Djamel Hammoudi, Azzedine Benabdesselam |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
geography
Materials science geography.geographical_feature_category Condensation General Engineering Reynolds number Humidity Laminar flow 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Inlet 01 natural sciences Aspect ratio (image) Physics::Geophysics 010305 fluids & plasmas Forced convection Physics::Fluid Dynamics symbols.namesake 0103 physical sciences Mass flow rate symbols 0210 nano-technology |
| Zdroj: | International Journal of Thermal Sciences. 126:263-271 |
| ISSN: | 1290-0729 |
| DOI: | 10.1016/j.ijthermalsci.2017.12.032 |
| Popis: | This paper presents a numerical modeling of steam condensation in a vertical channel in the presence of a noncondensable gas (air) during forced convection. A laminar vapor steam-air mixture flows downwards through a rectangular channel with a constant temperature and concentration and a uniform velocity profile at the inlet. The model includes the axial diffusion terms. From numerical modeling and for the different inlet parameters and aspect ratios values, the condensed mass flow rate has been evaluated. The obtained results show that the increase in the inlet humidity, the inlet Reynolds number, and the inlet temperature, as well as the aspect ratio, promote condensation. It has been found that at a given axial position, the mass flow rate increases with the above-mentioned parameters and it reduces through the channel. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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