Skip to Main Content U.S. Department of Energy

STOMP

Operational Modes

Description of the contaminated subsurface environment is founded on governing conservation equations and constitutive functions. Governing coupled flow equations are partial differential equations for the conservation of water mass, air mass, CO2 mass, CH4 mass, volatile organic compound mass, salt mass, and thermal energy. Constitutive functions relate primary variables to secondary variables. Solution of the governing partial differential equations occurs by the integral volume finite difference method. The governing equations that describe thermal and hydrogeological flow processes are solved simultaneously using Newton-Raphson iteration to resolve the non-linearities in the governing equations. Governing transport equations are partial differential equations for the conservation of solute mass. Solute mass conservation governing equations are solved sequentially, following the solution of the coupled flow equations.

The sequential version of the STOMP simulator currently has 15 operational modes, allowing the user to specify the governing equations that are to be solved. Seven operational modes are available for distribution and the remaining modes are currently restricted as research tools.

Operational Mode Solved Coupled Equations Status
STOMP-W
Water
water mass Available
STOMP-W-R
Water with Reactive Transport
water mass Available

STOMP-WAE
Water-Air-Energy

water mass
air mass
thermal energy

Available

STOMP-WO
Water-Oil

water mass
oil mass

Available

STOMP-WOA
Water-Oil-Air

water mass
oil mass
air mass

Available
STOMP-WS
Water-Salt
water mass
salt mass
Available

STOMP-CO2
Water-CO2-Salt

water mass
CO2 mass
NaCl mass
Available

STOMP-CO2-R
Water-CO2-Salt with Reactive Transport

water mass
CO2 mass
NaCl mass
Available
STOMP-CO2E
Water-CO2-Salt-Energy
water mass
CO2 mass
NaCl mass
thermal energy
Available

STOMP-HYD
Water-CO2-CH4-Salt-Energy

water mass
CO2 mass
CH4 mass
NaCl mass
thermal energy

Available
STOMP-WA
Water-Air
water mass
air mass
Research Code

STOMP-WAE-B
Water-Air-Energy-Barrier

water mass
air mass
thermal energy

Research Code

STOMP-WOAE
Water-Oil-Air-Energy

water mass
oil mass
air mass
thermal energy

Research Code
STOMP-WOD
Water-Oil-Dissolved Oil
water mass
oil mass
dissolved oil mass
Research Code
STOMP-WAS
Water-Air-Salt
water mass
air mass
salt mass
Research Code
STOMP-WASE
Water-Air-Salt-Energy
water mass
air mass
salt mass
thermal energy
Research Code
STOMP-OS
Oil Shale
heavy oil mass
light oil mass
CHX mass
CH4 mass
thermal energy
Research Code
STOMP-HYD-KE
Water-CO2-CH4-Salt-Energy
water mass
mobile CO2 mass
mobile CH4 mass
hydrate CO2 mass
hydrate CH4 mass
thermal energy
Research Code
STOMP-HYDT-KE
Water-CO2-CH4-N2-Salt-Energy
water mass
mobile CO2 mass
mobile CH4 mass
mobile N2 mass
hydrate CO2 mass
hydrate CH4 mass
hydrate N2 mass
thermal energy
Research Code

Note that the operational modes do not comprise all of the possible combinations of coupled governing equations. The combination sets of coupled governing equations selected for inclusion in the list of operational modes represent those with the greatest utility for physical systems. For example, a two-phase non-volatile non-isothermal operational mode could be envisioned, which solved the water mass and energy conservation equations. This operational mode would invoke the assumption of a non-participating gas phase. Two-phase flow and transport through porous media under thermal gradients, however, strongly depends on the diffusion, dispersion, and advection transport through gas phase, even for low thermal gradients. Therefore, this operational mode, while capable of functioning and producing converged solutions, would have limited utility because of its associated premise that gas phase transport could be neglected.

STOMP

eSTOMP

Capabilities

Contacts