Theory Guide

• Glossary of Symbols

Flow Modes

• RICHARDS Mode
  • Governing Equations
• TH Mode (Thermal-Hydrologic)
  • Governing Equations
  • Ice Model
• GENERAL Mode
  • Governing Equations
  • Capillary Pressure - Saturation Functions
  • Relative Permeability Functions
  • Kelvin’s Equation for Vapor Pressure Lowering
  • Fully Implicit Solute Coupling
• HYDRATE Mode
  • Governing Equations
  • Capillary Pressure - Saturation Functions
  • Relative Permeability Functions
• MPHASE Mode
  • Governing Equations
  • Source/Sink Terms
  • Variable Switching
  • Sequentially Coupling MPHASE with CHEMISTRY
• SCO2 Mode
  • Governing Equations
  • Capillary Pressure - Saturation Functions
  • Relative Permeability Functions
• Constitutive Relations
  • Capillary Pressure - Saturation Functions
  • Relative Permeability Functions
  • Smoothing

Reactive Transport Mode (Keyword CHEMISTRY)

• Introduction
• Governing Equations
• Mineral Precipitation and Dissolution
  • Rate Limiter
  • Changes in Material Properties
  • Variable Surface Area
  • Affinity Threshold
• Sorption
  • Sorption Isotherm
  • Ion Exchange
  • Exchange Capacity
  • Selectivity Coefficient Relations
  • Gaines-Thomas Exchange
  • Surface Complexation
  • Multirate Sorption
• Aqueous Complexing Reaction Kinetics
• Colloid-Facilitated Transport
• Tracer Mean Age
• Thermodynamic Database
  • Database Structure
  • Eh, pe
  • Python Script to Select Primary and Secondary Species from Thermodynamic Database
• References

Geophysics Modes

• ERT Mode
  • Governing Equations

Well Models

• WELL Model
  • Structure
  • Governing Equations
• FULLY_IMPLICIT Coupling
  • Well Index

Process Models Under Development

• Multiple Continuum Model
  • Thermal Conduction
  • Reactive Transport Dual Continuum Model
• Geomechanics

Regions

• Polygon
  • Volume
  • Point in polygon
  • Cell mapping
• Planar Patch
  • Geometric definition
  • Orientation
  • Cell–patch intersection
  • Centroid filter

Numerical Methods

• Method of Solution
  • Integrated Finite Volume Discretization
  • Two Point Flux Approximation
  • Global Implicit Newton-Raphson Linear and Logarithmic Update
  • Operator Splitting
• Reaction Sandbox
  • Background
  • Implementing the Reaction Sandbox

References

• Theory Guide Citations