Lattice Boltzmann Modeling of Drying of Porous Media Considering Contact Angle Hysteresis

• DOI: 10.1007/s11242-021-01644-9
• Publication Date: 2021-07-10T16:02:51Z
• Authors: Feifei Qin; Jianlin Zhao; Qinjun Kang; Dominique Derome; Jan Carmeliet
• Keywords: Lattice Boltzmann methods; Hysteresis

Drying of porous media is governed by a combination evaporation and movement the liquid phase within structure. Contact angle hysteresis induced surface roughness shown to influence multi-phase flows, such as contact line motion droplet, distribution during drainage coffee ring formed after droplet drying in constant radius mode. However, on still an unanswered question. Lattice Boltzmann model (LBM) advanced numerical approach increasingly used study change problems including drying. In this paper, based geometric formulation scheme prescribe angle, we implement framework two-phase pseudopotential LBM. The capability accuracy prescribing automatically measuring angles over large range are tested validated simulating droplets sitting flat curved surfaces. Afterward, proposed modeling Then, two connected capillary tubes studied, considering different ranges dynamics. Finally, applied dual-porosity medium, where rate compared with without hysteresis. be capable dealing accurately capturing physical mechanisms geometries.