TY - JOUR
TI - Evaporation and condensation of falling binary liquid film
AU - Nasr Abdelaziz
AU - Al-Ghamdi Abdulmajeed S
JN - Thermal Science
PY - 2017
VL - 21
IS - 1
SP - 211
EP - 222
PT - Article
AB - This paper investigates a numerical analysis of coupled heat and mass  transfer during the simultaneous evaporation and condensation in the  presence of a binary liquid film flowing on one of two parallel vertical  plates under mixed convection. The first plate of a vertical channel is  externally insulated and wetted by a binary liquid film while the second one  is dry and isothermal. The liquid mixture consists of water (the more  volatile component) and ethylene glycol while the gas mixture has three  components: dry air, water vapour and ethylene glycol vapour. The conducted  simulations enable the analysis of the heat and mass transfer during water  evaporation and ethylene glycol condensation for different inlet gas  properties. It is found that an increase of the inlet vapour concentration  of ethylene glycol enhances the water evaporation while the increase of the  inlet vapour concentration of water slightly enhances the ethylene glycol  vapour condensation. The increase of inlet gas temperature considerably  benefits the water evaporation and slightly influences the ethylene glycol  condensation.