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Simultaneous Heat and Mass Transfer in Inclined Channel With Asymmetrical Conditions

[+] Author Affiliations
Othmane Oulaid

University of Sherbrooke, Sherbrooke, QC, Canada; Cadi Ayyad University of Marrakesh, Marrakesh, Morocco

Brahim Benhamou

Cadi Ayyad University of Marrakesh, Marrakesh, Morocco

Nicolas Galanis

University of Sherbrooke, Sherbrooke, QC, Canada

Paper No. IHTC14-22221, pp. 351-359; 9 pages
doi:10.1115/IHTC14-22221
From:
  • 2010 14th International Heat Transfer Conference
  • 2010 14th International Heat Transfer Conference, Volume 2
  • Washington, DC, USA, August 8–13, 2010
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4937-8 | eISBN: 978-0-7918-3879-2
  • Copyright © 2010 by ASME

abstract

This work deals with a numerical study of simultaneous heat and mass transfer with phase change in an inclined channel formed by two parallel plates. The lower one is covered by a thin liquid water film and the upper one is considered impermeable. The plates are maintained at a constant temperature TW . Ambient air with uniform dry bulb temperature Tin and relative humidity φin enters the channel with a uniform upward velocity Uin . The liquid film is assumed to be extremely thin and its temperature is equal to the wall temperature. Steady state conditions are considered and the flow is assumed to be laminar. Viscous dissipation, radiation heat transfer and other secondary effects (pressure work, energy transport by the inter-diffusion of species, Dufour and Soret effects) are neglected. The physical properties are taken constant except for the density in the body forces, which is considered to be a linear function of temperature and mass fraction. Results show that buoyancy forces have an important effect on the hydrodynamic, thermal and mass fraction fields and this effect depends on the channel inclination. A flow reversal chart and analytical correlations for the corresponding critical values of the thermal and solutal Grashof numbers are presented for different channel inclinations.

Copyright © 2010 by ASME

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