CUBIT 13.2 Release Notes
CUBIT is a full-featured software toolkit for robust generation of two- and three-dimensional finite element meshes (grids) and geometry preparation. Its main goal is to reduce the time to generate meshes, particularly large hex meshes of complicated, interlocking assemblies.
is a solid-modeler based preprocessor that meshes volumes and surfaces
for finite element analysis. Mesh generation algorithms include
quadrilateral and triangular paving, 2D and 3D mapping, hex sweeping and
multi-sweeping, tet meshing, and various special purpose primitives.
CUBIT contains many algorithms for controlling and automating much of the
meshing process, such as automatic scheme selection, interval matching,
sweep grouping and sweep verification, and also includes state-of-the-art
Preparation: One of CUBIT's strengths is its ability to import
and mesh geometry from a variety of CAD packages. CUBIT currently
integrates the ACIS and Catia geometry kernels directly within
its code base, allowing direct manipulation of the native CAD geometry
format within CUBIT. This reduces the errors and anomalies so often
associated with geometry translation. CGM also boasts a facet-based
geometry kernel developed at Sandia that can be used for remeshing or
editing old mesh files or models defined by triangle facets. In addition,
CUBIT has developed a comprehensive virtual geometry capability that
permits local composites and partitions to geometry without modifying the
underlying native geometry representation. The user can choose to ignore,
clean-up or add features to the model allowing greater flexibility to
meshing algorithms to generate better quality elements.
CUBIT Environment: CUBIT has developed both a convenient command line interface with an extensive command language as well as a polished graphical user interface environment. The GUI is based upon the cross-platform standard QT, which allows the same look and feel on all supported platforms. Also included is a graphical environment based upon the VTK graphics standard which has been optimized for display and manipulation of finite element data and geometry. Fast, interactive manipulation of the model is a tremendous advantage for models with thousands of parts or millions of elements.
For more information on CUBIT, including licensing arrangements and terms see the CUBIT website http://cubit.sandia.gov
Meshing Geometry Import/Export
These images illustrate the effect of the remesh tet command. Left is the initial mesh and right is the mesh after applying the command.
For those who have access to the Sierra stk_adapt module, Cubit
13.2 supports parallel refinement. Parallel mesh
refinement allows refinement to go beyond the memory limits
of a single processor. The resulting mesh size is only
limited by the number of processors you have available to
perform the refinement. To use this feature, first create a
course mesh for your model. Then using the command
below, two files will be created that can be used in an
external stk_adapt process.
Refine Parallel [Fileroot <'root filename'>] [Overwrite][No_geom] [No_execute] [Processors <int>] [Numsplit <int>] [Version <'Sierra version'>]
The first image shows an initial hex mesh generated in Cubit with
2365 hexes. The next image displays a uniformly refined
mesh using stk_adapt with 20 processors. The result is about
1.35 million hexes where the colors represent the different
processors used in the refinement.
Cubit 13.2 contains an upgrade to its third-party tet
mesher. On 64-bit platforms, the new tet mesher is fully
64-bit and will allow for much larger meshes than the
previous versions of Cubit.
Defeature volume <id_range> [auto_identify] curve_length <value> [Curve <ids>] curve_curvature <value> [Curve <ids>] surface_curvature <value> [Surface <ids> ] surface_prox2d <value> [Surface <ids> ] [group <id>] [keep]
IDEAS import/export now has support for the physical property index. The physical
property index is interpreted in CUBIT to be blocks. On import, Each mesh
element is placed into a block based upon the physical property
index and mesh element type. When exporting an IDEAS file, Cubit assigns the same IDEAS
physical property index to all elements of the same element type in the same block.
CUBIT 13.2 supports the following Platforms
CUBIT Licensing and Passwords
CUBIT Support Lead
CUBIT Project Lead
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