Commands

Operate on discrete fracture networks (DFNs). A DFN is a collection of line segments (planar, convex polygons, and/or disks) in 2D (3D). Each element in a DFN is called a fracture. Fractures hold lists of properties and can also hold extra variables and belong to groups. The properties may be of any type and can be assigned as needed. DFNs, as sets of fractures, can be generated via DFN templates that are sets of statistical parameters describing the distribution of fractures. Intersections between fractures can be calculated and queried for fracture connectivity analyses.

Note

  • All DFN fractures must be created inside the model domain, as specified by the model domain command.
  • Fracture properties and extra variables are converted to floating point numbers or integers when imported from a property file, although they are exported in their actual format. Thus, one may save/restore general properties or extra variables of fractures in a model state (SAV) file, but may not import these values from a property file. An Itasca DFN data file format is specified in “DFN-Related File Formats,” along with a property file format to assign properties to the fractures.

DFN Commands

fracture aperture Assign apertures to fractures.
fracture attribute Modify fracture attributes.
fracture cluster Compute fracture clusters.
fracture combine Simplify fractures.
fracture compute Compute fracture statistics.
fracture connectivity Calculate fracture connectivity with a specified structure.
fracture contact-model Assign contact models via fractures.
fracture copy Copy fractures.
fracture create Create a deterministic fracture.
fracture delete Delete fractures.
fracture dfn-extra Set DFN extra variables.
fracture dfn-group Specify DFN group names.
fracture export Export fractures to file.
fracture extra Set fracture extra variables.
fracture generate Generate fractures from a statistical description.
fracture group Specify fracture group names.
fracture import Import fractures.
fracture initialize Modify fracture attributes.
fracture intersections automatic-update Set the intersection automatic-updating state.
fracture intersections compute Compute intersections.
fracture intersections delete Delete intersections.
fracture intersections scanline Create intersections corresponding to scanline mapping.
fracture list List the fracture attributes.
fracture property Assign fracture surface properties.
fracture prune Prune isolated fractures.
fracture set-property Assign properties in objects that intersect fractures.
fracture template create Create a fracture generation template.
fracture template delete Delete fracture generation templates.
fracture template modify-default Modify the default fracture generation template.
fracture verify-file Verify a DFN file.