Pore-scale analysis of evaporation and condensation dynamics in porous media.
We developed analytical models for surface- and capillary-assisted condensation and evaporation dynamics considering phase-change behavior in idealized wedge-shaped pores and in adsorbed liquid films as building blocks for condensation and evaporation in granular media. Phase-change rates are important for dust mobilization and deposition, vapor transport through partially saturated media, and for residence times of emitted combustion particulates. The basic wedge-film solution was scaled up to represent 3D transient evaporation and condensation processes within an assembly of rough spherical particles. Model comparisons with experimental data for evaporation from a single meniscus and condensation rates into sand samples show consistent agreement for a range of media and ambient conditions.
Shahraeeni
Ebrahim
E
Soil and Terrestrial Environmental Physics, Swiss Federal Institute of Technology (ETHZ), Zurich. ebrahim.shahraeeni@env.ethz.ch
Or
Dani
D
D000327:Adsorption; D008567:Membranes, Artificial; D010316:Particle Size; D016062:Porosity; D013499:Surface Properties; D014835:Volatilization
D008567:Membranes, Artificial