CAD-Based Meshing Capabilities

Itasca offers two CAD-based interactive meshers: Griddle and BlockRanger.

Griddle and BlockRanger are both used with the Rhino CAD system. The entire meshing process done within the Rhino interface. Resulting meshes can be imported into FLAC3D or 3DEC.

What is Rhino?

Rhino is a solid modeling tool for designers and engineers. With Rhino you can import, create, edit, and export geometrical objects in a variety of formats for use in Itasca software (FLAC3D, 3DEC, PFC).

Note that:

  • Itasca CAD-based meshers require the Rhino CAD system. Rhino allows you to build the geometry and directly use the surface and/or volume meshing capabilities offered by Griddle and BlockRanger.
  • Rhino CAD system can be optionally purchased, at a reduced price, with the purchase of FLAC3D, 3DEC, or PFC3D.
  • Itasca’s meshing tool BlockRanger is included free with the purchase of FLAC3D Versions 6.0 and 7.0 or 3DEC Version 5.2.
What is BlockRanger?

BlockRanger allows you to interactively build, using the powerful CAD capabilities of Rhino, all-hexahedral, structured (mapped) meshes for simple to fairly complex 3D geometries. BlockRanger requires the user to partition the 3D geometry to be meshed into simple solids like brick-, wedge-, or tetrahedral-type shapes. Users have control over the maximum number of elements and the number of subdivisions (number of elements) on the edges of those solid shapes. For very complex geometries, subdividing your model into simpler solid shapes can be very time consuming. For these cases Itasca recommends Griddle.

What is Griddle?

Griddle is a new Itasca interactive Rhino CAD-based meshing product. Griddle allows you to easily build unstructured meshes for simple to very complex 3D geometries. This powerful, easy-to-use, automatic mesher requires minimal input from the user to build meshes for simple to very complex geometries. After the model geometry is built or imported into Rhino, Griddle allows you to automatically remesh the surfaces to the desired density and type (triangles, quadrilaterals). The Griddle volume mesher is then called to fill the geometry with zones (all-tetrahedral or hex-dominant). A Griddle meshing workflow is shown below.

Surface remeshing allows excellent control over element sizing, including honoring hard edges and points (edges and points that need to be on the surface). Griddle can produce triangle, quad-dominant, or all-quadrilateral surface meshes.

Surface meshes are used directly by the Griddle volume mesher. The final solid elements composing the mesh (hexahedrons, tetrahedrons, prisms, pyramids) have faces that coincide with the input surface mesh.

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