Numerical study of heat and mass transfer in mixed convection inside a vertical channel with a binary liquid film streaming in one of its heated walls

We consider a thin binary liquid film streaming on the internal face of one of the two parallel plates. The wet plate is submitted to a constant and u niform thermal flow while the second is adiabatic. The presented simulation s concern a vertical channel whose dry wall is adiabatic and two binary mix tures: ethanol-water and ethylene glycol-water. We show the film thickness importance and mixture composition in the mass and thermal transfers. For t he ethanol-water liquid mixture, the results seem to be foreseeable while i t is different for the second mixture (ethylene glycol-water). We show for example, that for a particular ethylene glycol-water mixture concentration at the canal entry, it is possible to evaporate in the same conditions more water than if the film at the entry was pure water only. (C) 1999 Publishe d by Elsevier Science Ltd. All rights reserved.