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*FLOW

Define seepage coefficients and associated sink pore pressures.

This option is used to provide seepage coefficients and sink pore pressures to control pore fluid flow normal to the surface in consolidation analysis.

This page discusses:

Optional parameters

AMPLITUDE

Set this parameter equal to the name of the amplitude curve that gives the variation of reference pore pressure with time. If this parameter is omitted, the reference magnitude is applied immediately at the beginning of the step or linearly over the step depending on the value assigned to the AMPLITUDE parameter on the STEP option (see Defining an Analysis). The AMPLITUDE parameter is ignored for nonuniform seepage flow boundary conditions defined in user subroutine FLOW and for drainage-only seepage boundary conditions.

OP

Set OP=MOD (default) for existing FLOWs to remain, with this option modifying existing flows or defining additional flows.

Set OP=NEW if all existing FLOWs applied to the model should be removed. New flows can be defined.

Data lines to define uniform seepage

Data lines to define drainage-only seepage

Data lines to define nonuniform seepage