The Role of Discrete Capillary Rings in Mass Transfer From the Surface of a Drying Capillary Porous Medium

Abstract The mass exchange between the surface of a model capillary porous medium and adjacent gas-side boundary layer is studied in limiting condition isothermal, slow drying. In order to quantify role significance liquid films process, three-dimensional pore network Monte Carlo simulations are carried out systematically presence absence discrete rings. performed with rings show noticeable delay transition from capillary-supported regime diffusion-controlled regime. These simulation results differ significantly predictions classical models without films, they appear be more consistent experiments conducted real systems. As compared models, seems predict favorably spatiotemporal evolution wet dry patches at as well their relative contributions net rate. This apparent when analytical solution commonly used Schlünder’s examined against numerical using ring models.