Commands

Specifies a 2D geometry, then creates zones by extruding into the third dimension. Creates and manipulates a 2D geometric description of a model, which can be extruded in the third dimension to create 3D zones. Multiple sets of extrude data can be created, each under a different name. Points are created in space, connected to edges, which are themselves connected into blocks. Edges are either linear or curved, in which case they follow a path given by a number of control points. Blocks of two types can be created in the Extruder: 3- or 4-sided blocks with structured mesh (“regular blocks”) and blocks with 5 or more sides and unstructured mesh (“irregular blocks” - these blocks may have convex or concave boundary, may be multiply-connected and/or contain nested blocks). Both structured and unstructured meshes consist of triangular and/or quadrilateral elements. Upon extrusion, a single zone (brick or wedge) is created from each element of the mesh.

Number of zones and their ratio can be assigned for every edge and they propagate automatically across all regular blocks attached to the edge. However, these parameters are unique for every edge in an irregular block; upon any changes of edge parameters, including vertex locations, the unstructured mesh has to be re-created. A multiplier factor can be assigned to a regular block to increase (densify) the number of zones in it. Irregular blocks do not use multipliers.

Points, edges, and blocks can be assigned group names, which are then assigned to the gridpoints, faces and zones created by them.

The extrude data are also accessible by FISH, which means that extruded geometry can be scripted and parameterized.

The FLAC3D user interface provides an interactive front end to these commands, allowing one to graphically create 2D models and then extrude them.

EXTrude Block commands

extrude block create Create block(s).
extrude block delete Delete block(s).
extrude block group Assign/remove a group name to blocks.
extrude block id Modify a single block by ID.
extrude block list Print information about blocks.
extrude block multiplier The command only applies to regular (3- or 4-sided) blocks...
extrude block position Modify a block by position.

EXTrude Edge commands

extrude edge clear Clear all zone size and ratio settings on edges.
extrude edge combine Combines edges into a single edge.
extrude edge create Creates an edge or a set of edges.
extrude edge delete Delete edges.
extrude edge group Assign/remove a group name to edges.
extrude edge id Modify a single edge by ID.
extrude edge list Print information about edges.
extrude edge ratio Set the ratio.
extrude edge ratio-isolate The option only applies to the edges which form regular...
extrude edge size Set the number of zones on the edge.

EXTrude Mesh commands

extrude mesh gradation Specify maximum gradation f > 0 for the unstructured mesher.
extrude mesh list List information about global meshing parameters.
extrude mesh mode Specify the operating mode for the unstructured mesher.
extrude mesh optimization Specify optimization level 0 ≤ i ≤ 10 for the...
extrude mesh quad-weight Specify weight on quadrilaterals 0 ≤ f ≤ 1 for...
extrude mesh reset Reset all mesh parameters to defaults.
extrude mesh shape-quality Specify value for the shape-quality 0 ≤ f ≤ 1...
extrude mesh target-size Specify desired zone size (target size) inside the domain, f ...
extrude mesh type Specify the type of mesh.

EXTrude Point commands

extrude point create Create a point.
extrude point delete Delete points.
extrude point group Assign/remove a group name to points.
extrude point id Modify a single point by ID.
extrude point list Print information about points.
extrude point transform Transform points.

EXTrude Segment commands

Modifies the segments that describe how the 2D model is extruded in the third dimension. Each segment is identified by an index, from 1 to the number of segments in the extrusion. All operations is done for the current extrude set.

extrude segment add Adds segment(s).
extrude segment clear Clear all segment data.
extrude segment delete Delete segment(s).
extrude segment index Modify a segment by ID.
extrude segment list List the segments and their values.
extrude segment origin Set the start position of the first segment.

EXTrude SEt commands

extrude set automatic-validate Set off/on automatic validation.
extrude set automatic-zone Set automatic zoning of the extrusion set.
extrude set clear Clear all set data (points, edges, blocks in the 2D...
extrude set delete Delete an extrude set.
extrude set list List extrude set information.
extrude set metadata Manipulate extrude set metadata.
extrude set select Set the current extrude set.
extrude set system Set the coordinate system.
extrude set update-polygons Update the internal list of closed polygons to assure that...