Solution Control Card Options (HYDT-KE)

For STOMP-HYDT-KE, four classes of options are specified via the Solution Control Card: 1) Execution Mode Options, 2) Operational Mode Options, 3) Fluid Diffusion Options, and 4) Interfacial Averaging Options.  Execution Mode Options are used to specify the state of the simulation.  Operational Mode Options are used to specify the solved equations and active processes. Fluid Diffusion Options are used to specify the models for component diffusion through fluids. Interfacial Averaging Options are used to specify the model for computing state variables at the centroids of grid-cell surfaces.

Execution Mode Options

Two Execution Modes are recognized: Normal, and Restart. In the Normal mode, initial state conditions are declared through the Initial Conditions Card. In the Restart mode, initial state conditions are assigned via a restart file from a previous execution or declared through the Initial Conditions Card, using the special overwrite option for selected parameters. Unless specified through the Output Control Card, restart files (i.e., restart.n) are generated at each plot.n write event, and have name extensions that correspond to the generating time step (e.g., the file restart.0028 would have been generated at the conclusion of time step 28). Restart files are text files that contain simulation time and control information, and a collection of field variables needed to redefine the simulation state for the operational mode. 

Expand for Execution Mode Options...

Normal Mode

In the Normal mode, STOMP-HYDT-KE executes from a declared start time, using an initial state declared through the Initial Conditions Card, until the declared stop time, the declared number of time steps, an execution error, or a sequence of convergence failures. The following keywords may also be used after specifying the "Normal" Execution Mode.

No Flow

This option results in the coupled flow and transport equations only being computed once, eliminating the flow calculations each time step for a reactive transport problem with a steady flow field. 

Info

No Flow Option

The No Flow option, when used in conjunction with the Normal or Restart execution modes, results in the coupled flow and transport equations only being computed once.  This option can be used to eliminate the flow calculations each time step for a solute transport problem with a steady flow field. 

 

Scaling Factor

 

Restart Mode

In the Restart mode, STOMP-HYDT-KE executes from either a declared start time or the start time specified in the restart file, using an initial state defined by a previous execution, until the declared stop time, the declared number of time steps, an execution error, or a sequence of convergence failures. The following keywords may be after specifying the "Restart" Execution Mode.

File

This option triggers STOMP-W to read an additional character string, which is the name of the restart file.  

No Flow

This option results in the coupled flow and transport equations only being computed once, eliminating the flow calculations each time step for a reactive transport problem with a steady flow field. 

Info

No Flow Option

The No Flow option, when used in conjunction with the Normal or Restart execution modes, results in the coupled flow and transport equations only being computed once.  This option can be used to eliminate the flow calculations each time step for a solute transport problem with a steady flow field. 

Scaling Factor

 

Info

Overwrite 

When the keyword "overwrite" is included in the initial or boundary conditions cards with any of the above options during a restart simulation, the specified values will overwrite those from the restart file.

Operational Mode Modifiers

The Operational Mode is HYDT-KE.  This identifier is used to make certain that the operational mode of the STOMP executable matches the operational mode declared in the input file.  The solved coupled equations are specified via keyword modifiers to the operational mode. 

Operational Mode Options

STOMP-HYDT-KE

Info

Accepted Keywords

The above keyword is required for specifying the operational mode as STOMP-HYDT-KE

Expand for Operational Mode Modifers...

w/Isothermal

This modifier deactivates the energy conservation equation from the set of solved coupled equations. Temperature will not change during the simulation.

w/Isobrine

This modifier deactivates the salt-mass conservation equation from the set of solved coupled equations. Salt concentrations will be set to zero during the simulation.

w/Iso-CO2

This modifier deactivates the CO₂-mass conservation equation form the set of solved coupled equations. CO₂ concentrations will be set to zero during the simulation.

 w/Iso-CH4

This modifier deactivates the CH₄-mass conservation equation form the set of solved coupled equations. CH₄ concentrations will be set to zero during the simulation.

w/Iso-N2

This modifier deactivates the N₂-mass conservation equation form the set of solved coupled equations.  N₂ concentrations will be set to zero during the simulation.

w/Inhibitor

This modifier enables the effects of a NaCl inhibitor on hydrate formation and dissociation.

Fluid Diffusion Options

Models for diffusion coefficients for components in the three mobile fluids: 1) aqueous, 2) nonaqueous liquid, and 3) gas are specified via the Fluid Diffusion Options

Expand for Fluid Diffusion Options...

Aqueous Diffusion Options

Constant

This option allows the user to specify a fixed diffusion coefficient for all aqueous components, other than solutes and species.

Variable

This option specifies that the aqueous diffusion coefficient will depend on thermodynamic state conditions, other than for solutes and species.

Zero

This options sets all aqueous diffusion coefficients to zero, other than for solutes and species.

Gas Diffusion Options

Constant

This option allows the user to specify a fixed diffusion coefficient for all aqueous components, other than solutes and species.

Variable

This option specifies that the gas diffusion coefficient will depend on thermodynamic state conditions, other than for solutes and species.

Zero

This options sets all gas diffusion coefficients to zero, other than for solutes and species.

Nonaqueous Liquid Diffusion Options

Constant

This option allows the user to specify a fixed diffusion coefficient for all aqueous components, other than solutes and species.

Variable

This option specifies that the nonaqueous diffusion coefficient will depend on thermodynamic state conditions, other than for solutes and species.

Zero

This options sets all nonaqueous diffusion coefficients to zero, other than for solutes and species.

Interfacial Averaging Options

State variables at the centroids of grid-cell surfaces are required to compute fluxes between grid-cell centroids.  Models for computing the state variables on grid-cell surfaces are referred to as interfacial averaging schemes and use the state variables at adjacent grid-cells to compute the surface variables.  Default interfacial averaging schemes or various variable types have been selected for STOMP.  Schemes other than the defaults can be specified.

Expand for Interfacial Averaging Options...

Interfacial Averaging Schemes

Harmonic
Geometric
Arithmetic
Upwind
Downstream
Moderated Upwind
Neiber Downstream

Interfacial Averaging Variables and Defaults

Variable	Default Averaging Scheme
Aqueous Density	Upwind
Aqueous Diffusion	Harmonic
Aqueous Relative Permeability	Upwind
Aqueous Viscosity	Harmonic
Gas Density	Upwind
Gas Diffusion	Harmonic
Gas Relative Permeability	Upwind
Gas Viscosity	Harmonic
Hydraulic Dispersion	Harmonic
Intrinsic Permeability	Harmonic
NAPL Density	Upwind
NAPL Diffusion	Harmonic
NAPL Relative Permeability	Upwind
NAPL Viscosity	Harmonic
Salt Aqueous Diffusion	Harmonic
Solute/Species Diffusion	Harmonic
Thermal Conductivity	Harmonic