InterPore2026

A Unified Multicomponent–Multiphase Pseudopotential LBM for CO₂ Dissolution in Water- and Oil-Saturated Nanoporous Media

19 May 2026, 15:05

1h 30m

Poster Presentation (MS13) Fluids in Nanoporous Media Poster

Speaker

Jiangjiang Wang (School of Engineering, Westlake University, Hangzhou, City)

Description

Nanoporous geological materials are increasingly relevant to subsurface CO₂ storage and associated fluid–rock processes, yet modelling dissolution in such confined environments remains challenging because phase behaviour, interfacial physics and wettability must be treated consistently. We present a multicomponent–multiphase pseudopotential lattice Boltzmann (LB) framework designed for nanopore-scale applications. The model is closed with a non-ideal equation of state (Peng–Robinson) and coupled to a consistent lattice-to-physical unit conversion strategy so that thermodynamic and hydrodynamic properties can be mapped reliably across components. We validate the framework against key equilibrium and interfacial benchmarks, including phase coexistence, interfacial tension, wettability calibration via contact-angle tests, and solubility behaviour under reservoir-relevant conditions using published experimental constraints. The capability of the framework is demonstrated on two representative nanoporous settings relevant to carbon storage: CO₂ dissolution in water-bearing porous structures and CO₂ dissolution in oil-saturated nanoporous media. Across these applications, the simulations reproduce stable multiphase configurations and capture systematic sensitivity of dissolution and interfacial partitioning to confinement and surface wettability, while remaining consistent with the imposed thermodynamic constraints. To facilitate comparison across conditions, we further introduce a geometry-informed spatial diagnostic that links interfacial morphology to surrounding dissolved-phase distributions without relying on case-specific fitting parameters. Overall, the proposed framework provides a reproducible and extensible tool for studying CO₂ dissolution, interfacial effects and wettability-driven partitioning in confined porous environments, and can be readily adapted to broader multiphase multicomponent problems encountered in subsurface energy and environmental systems.