Gaining insight into the effective stress parameter using pore-scale numerical modelling with the multiphase lattice Boltzmann method

We investigate the factors influencing effective stress parameter, χ, in unsaturated granular soils using pore-scale numerical modelling. The Shan-Chen multiphase lattice Boltzmann method (LBM) is used for this purpose. A procedure outlined measuring χ LBM data. full hydraulic cycle simulated a soil column and individual contributions of suction surface tension forces to are measured as function degree saturation, S r . It observed that while = 0 at 1 1, > < 1. trend χ- curve explained based on components. Schematic plots utilized facilitate understanding trends also relationship hysteretic; particularly, larger during imbibition compared drainage, wide range , due more pronounced contribution forces.