HGC Model Introduction

HGC Model Introduction

HGC Coupling

HYDROGEOCHEM (HGC) is a physical-based flexible and comprehensive computational model for simulating coupled THMC (Thermal-Hydraulic-Mechanical-Chemical) processes in saturated-unsaturated subsurface media.

HYDROGEOCHEM (HGC) model has been successfully used in studying radioactive waste and subsurface contamination. This model may (1) strategically guide monitoring of field investigations, (2) accurately determine environmental safety and impacts of natural processes and anthropogenic activities, (3) significantly assist and advance the design of engineering systems, and (4) correctly and realistically interpret scientific findings. HGC model can simulate a single process or partially or fully coupled THMC processes. HGC can cover a large variety of real-world subsurface problems due to its comprehensive mathematical formulations and powerful numerical capabilities.

HGC Model Introduction

HGC Modules

Flow module:

HGC can simulate density-dependent flow processes in integrated unsaturated and saturated groundwater zones.

Reactive chemical transport module:

HGC can simulate mixed fast equilibrium and slow kinetic reactions simultaneously. Reactions include aqueous complexation, multi-site adsorption/desorption, multi-site ion-exchange, precipitation/dissolution, oxidation/reduction, acid-base reactions, microbial-mediated reactions, etc. HGC also offers linear KD, Freundlich, Langmuir models.

Thermal transport module:

Temperature changes are induced by fluid injection and chemical reactions.

Linear geo-mechanics module:

Rock deformation and fault displacement are affected by fluid pressure, thermal pressure, and chemical concentrations.