STOMP

Initial Conditions Card (CO2E)

STOMP-CO2e solves coupled conservation equations for energy, water mass, CO2 mass and salt mass in variably saturated geologic media under nonisothermal conditions.  The simulator additional solves equations for the transport of passive solutes, allowing for partitioning of the solutes between the host rock/soil, aqueous phase, and gas phase.  When the ECKEChem module is implemented with the simulator, the simulator has capabilities for solving reactive transport problems involving equilibrium, kinetic, and conservation type geochemical equations. The Initial Conditions Card is used to establish state conditions at the start of the simulation for all grid cells.  For STOMP-CO2E the user must specify at least two of the following parameters at every grid cell: 1) aqueous pressure, 2) gas pressure, 3) aqueous saturation.  Unless otherwise specified the temperature is 20˚C and the gas pressure is 101325 Pa.   If the simulation involves passive solutes, the Initial Conditions Card is used to specify solute concentrations at the start of the simulation.  Likewise if the simulation involves reactive species and code implementation includes the ECKEChem module, then the Initial Conditions Card is used to specify initial species concentrations.  The default solute and species concentrations are zero.  There is no particular order required for parameters on the Initial Conditions Card.  State condition errors that arise from specifications on the Initial Conditions Card are generally noted and indicated via the state condition check routine.  For restart simulations, the Initial Conditions Card is not required, but can be used overwrite values stored in the restart file.

  • General concepts for applying initial conditions are provided on the Card Description page.

  • Descriptions of the various classes of initial condition options (i.e., saturation-pressure, state variables, solute variables, species variables, and parameter specifications) are provided on the Card Options page.

  • Examples of Initial Condition Cards for STOMP-CO2e with and without solutes and geochemistry are provided on the Card Examples page.

 

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