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Conference papers
Transient evaporation of liquid water films and condensation of humid air at the isothermal walls of a square cavity
Abstract : The aim of this paper is to present modelling and numerical simulations of heat and mass transfer by double-diffusive convection and surface condensation or evaporation in a two-dimensional square cavity subjected to a uniform, but time-dependent wall temperature. At initial state, the cavity is filled with quiescent humid air at uniform temperature and density. By decreasing the wall temperature, condensation occurs at the four wall surfaces. The walls are then heated and evaporation of the liquid water is considered. Since the mass of humid air and average pressure experience noticeable changes during the periodic process, a weakly compressible formulation has been used for the modelling of the thermosolutal flow. Local thermodynamic assumption at the liquid-vapor interface and thin liquid film approximation are introduced.
Keywords :
Double-diffusive convection
Heat and mass transfer
Humid air
Initial state
Isothermal wall
Liquid water
Liquid water film
Liquid-vapor interface
Periodic process
Square cavity
Surface condensation
Thermosolutal
Thin liquid film
Time-dependent
Uniform temperature
Wall surfaces
Wall temperatures
https://hal-upec-upem.archives-ouvertes.fr/hal-00711395
Contributor : Xavier Nicolas Connect in order to contact the contributor
Submitted on : Sunday, June 24, 2012 - 5:04:49 PM
Last modification on : Tuesday, October 19, 2021 - 4:09:48 PM
Contributor : Xavier Nicolas Connect in order to contact the contributor
Submitted on : Sunday, June 24, 2012 - 5:04:49 PM
Last modification on : Tuesday, October 19, 2021 - 4:09:48 PM