Boundary Conditions Card Options (W)

Dirichlet-type boundary where the aqueous pressure is specified at the boundary surface centroid.

Dirichlet-type boundary where the aqueous pressure is specified at the boundary surface centroid, but flow is only permitted in the direction of the surface normal (i.e., out of the computational domain).

Dirichlet-type boundary where the aqueous pressure is specified at the boundary surface centroid of the lowest I, J, K indexed node.  The aqueous pressure at all other boundary surface centroids within the range of I, J, K indexed nodes is set to be in hydrostatic equilibrium with the aqueous pressure at the boundary surface centroid of the lowest I, J, K indexed node. This boundary type should be applied only to a column or plane of vertical surfaces.

Dirichlet-type boundary where the aqueous pressure is set and to and held at the initial value specified at the node adjacent to the boundary surface. This boundary type is invariant with time. If used with a restart simulation, the aqueous pressure for each specified boundary node is set at the value that is present in the restart file.

Dirichlet-type boundary where the aqueous pressure is set to the gas pressure at the boundary surface centroid.  The gas pressure is invariant in the simulation, but can be specified via the Initial Conditions Card. This boundary type is available only for two-phase conditions and imposes total-liquid saturation conditions (e.g., water table) at the boundary surface. 

Dirichlet-type boundary similar to a Hydraulic Gradient boundary, but limited to pressure boundaries of the local gas pressure. The aqueous pressure is specified at the boundary surface centroid of the lowest I, J, K indexed node. This boundary type is designed to model an exposed vertical face that seeps liquids. Liquid can enter a seepage face only for phase pressures that exceed the local gas pressure.  

Dirichlet-type boundary where hydrostatic conditions are imposed across the boundary surface for the specified phase.

Dirichlet-type boundary which is equivalent to the Hydraulic Gradient boundary condition, but with the option to specify additional gradients in the x-direction (global coordinates), y-direction (global coordinates), and z-direction (global coordinates).

Dirichlet-type boundary which is equivalent to the Seepage Face, but with the option to specify additional gradients in the x-direction (global coordinates), y-direction (global coordinates), and z-direction (global coordinates).

Neumann-type boundary where the aqueous volumetric flux is specified across the boundary surface.  Positive flux is in the direction of the surface normal.

Neumann-type boundary where the aqueous volumetric flux is zero.

Dirichlet-type boundary where the aqueous concentration, in terms of solute per mass of aqueous phase, of the solute is specified at the boundary surface centroid. Solutes migrate across the boundary surface via diffusion through the aqueous phase or advection with the aqueous phase.

Dirichlet-type boundary where the aqueous concentration, in terms of solute per mass of aqueous phase, of the solute is specified at the boundary surface centroid. Solutes migrate across the boundary surface only via aqueous phase advection in the direction opposite of the boundary-surface normal (i.e., into the domain).

Dirichlet-type boundary where the aqueous concentration, in terms of solute per mass of aqueous phase, of the solute is specified at the boundary surface centroid.  Solutes migrate across the boundary surface only via aqueous phase advection.  When aqueous phase flux is in the direction of the boundary-surface normal (i.e., out of the domain), the solute concentration is that at the grid-cell centroid, and when aqueous phase flux is in the direction opposite of the boundary-surface normal (i.e., into the domain), the solute concentration is that specified via the input.

Dirichlet-type boundary where the aqueous concentration, in terms of solute per volume of aqueous phase, of the solute is specified at the boundary surface centroid.  Solutes migrate across the boundary surface via diffusion through the aqueous phase or advection with the aqueous phase..

Dirichlet-type boundary where the solute concentration, in terms of solute per grid-cell volume, of the solute is specified at the boundary surface centroid.  Solutes migrate across the boundary surface only via aqueous phase advection in the direction opposite of the boundary-surface normal (i.e., into the domain).

Dirichlet-type boundary where the solute concentration, in terms of solute per grid-cell volume, of the solute is specified at the boundary surface centroid.  Solutes migrate across the boundary surface only via aqueous phase advection. When aqueous phase flux is in the direction of the boundary-surface normal (i.e., out of the domain), the solute concentration is that at the grid-cell centroid, and when aqueous phase flux is in the direction opposite of the boundary-surface normal (i.e., into the domain), the solute concentration is that specified via the input.

Dirichlet-type boundary where the aqueous concentration is set to be equal to the aqueous concentration at the grid-cell centroid at the start of the simulation. Solutes migrate across the boundary surface via diffusion through the aqueous phase or advection with the aqueous phase.

Solutes migrate across the boundary surface only via aqueous phase advection in the direction of the boundary-surface normal (i.e., out of the domain). As diffusive transport across the boundary surface is not considered the solute concentration entry is ignored.

Neumann-type boundary where the solute flux is zero.  Solutes are prevented from crossing the boundary surface regardless of their aqueous-phase concentration.

Dirichlet-type boundary where the aqueous concentration, in terms of species per mass of aqueous phase, of the species is specified at the boundary surface centroid.  Species migrate across the boundary surface via diffusion through the aqueous phase or advection with the aqueous phase.

Dirichlet-type boundary where the aqueous concentration, in terms of species per mass of aqueous phase, of the species is specified at the boundary surface centroid.  Species migrate across the boundary surface only via aqueous phase advection in the direction opposite of the boundary-surface normal (i.e., into the domain).

Dirichlet-type boundary where the aqueous concentration, in terms of species per mass of aqueous phase, of the species is specified at the boundary surface centroid.  Species migrate across the boundary surface only via aqueous phase advection.  When aqueous phase flux is in the direction of the boundary-surface normal (i.e., out of the domain), the species concentration is that at the grid-cell centroid, and when aqueous phase flux is in the direction opposite of the boundary-surface normal (i.e., into the domain), the species concentration is that specified via the input.

Species migrate across the boundary surface only via aqueous phase advection in the direction of the boundary-surface normal (i.e., out of the domain). As diffusive transport across the boundary surface is not considered the species concentration entry is ignored.

Dirichlet-type boundary where the aqueous concentration is set to be equal to the aqueous concentration at the grid-cell centroid at the start of the simulation. Species migrate across the boundary surface via diffusion through the aqueous phase or advection with the aqueous phase.

Neumann-type boundary where the species flux is zero.  Species are prevented from crossing the boundary surface regardless of their aqueous-phase concentration.