CUBIT™ 15.9 Released October 14, 2021

The CompSim-Geometry and Meshing Team is pleased to announce Version 15.9 of the CUBIT™ Geometry and Mesh Generation Toolkit. The following is a sampling of new capabilities and improvements introduced in CUBIT™ 15.9. See the CUBIT™ 15.9 Release Notes for a complete list, which includes resolved user tickets and capabilities developed in support of Next Generation Simulation (NGS).

What’s New…

  • Capability:  Machine learning is used to rapidly classify typical mechanism parts such as springs and then automatically simplify selected 3D springs to 1D curves using Scalable Geometric Modeler (SGM) for SM and SD analyses.  This spring reduction capability has been tested on ND parts to accelerate the design to simulation workflows.
Machine learning rapidly reduces 3D springs to 1D curves using Scalable Geometric Modeler (SGM)
  • Capability:  Parallel inline all-hex mesh generator Sculpt now offers options to generate adaptive meshes based on material.  Also, Sculpt now provides a new option, ‘input_stitch’, to read stitch files, which is supported in Sandia’s SPPARKS (Stochastic Parallel PARticle Kinetic Simulator) tool.
  • Capability: Surface and volume meshing schemes have been enhanced to address mesh size related issues. Mesh sizing on curves of a discrete surface is now respected during triangle meshing.  Pave quad meshing scheme has been made robust to handle mesh size that approaches local feature size, especially at holes.  A new command has been added to set minimum edge length in the parallel tet mesher.
  • Performance:  CUBIT™ 15.9 delivers a lightweight Uniform Mesh Refinement tool (UMR Lite) for generating a series of large refined meshes in billions within minutes on desktops for high fidelity simulations or solution verification studies.   This capability has been tested on “cavity” meshes for EM simulation using EMPIRE.
  • Usability:  CUBIT™ 15.9 GUI now provides Breadcrumb navigation to guide users and save real estate in the command panels.  New command panels have been added to reduce bolts and springs, generate solutions for thin-wall volumes, and launch lightweight Uniform Mesh Refinement tool (UMR Lite).
Breadcrumb navigation GUI pointing to UMR Lite command panel
  • Usability: User contributions to the Python script library continue to grow. These scripts are tested nightly against multiple versions of CUBIT™ on all three platforms. New CubitInterface functions have been implemented to support Python scripting.

How to Get it…

CUBIT™ is available to anyone on the Sandia LANs. CUBIT™ 15.9 will now run automatically from the Linux command prompt, replacing CUBIT™ 15.8. It is also licensed free of charge for government use outside of Sandia. If you are a current CUBIT™ licensed user, you may get CUBIT™ 15.9 by visiting and following the instructions on the CUBIT™ Download page. See CUBIT™ Licensing for information on obtaining a license.

How You Can Learn More…

The CUBIT™ 15.9 Release Notes provide a description of all the new features included in CUBIT™ 15.9. For detailed information follow the links to the online users manual.

Classroom tutorials are advertised on the CUBIT™ Tutorial Webpage, where you can also find a download for self-guided tutorials.

For more information contact, CUBIT™ Product Owner Roshan Quadros.

CUBIT™ 15.8 Released April 6, 2021

The CompSim-Geometry and Meshing Team is pleased to announce Version 15.8 of the CUBIT™ Geometry and Mesh Generation Toolkit. The following is a sampling of new capabilities and improvements introduced in CUBIT™ 15.8. See the CUBIT™ 15.8 Release Notes for a complete list, which includes capabilities developed in support of Next Generation Simulation (NGS).

What’s New…

  • Two new metrics have been added to Cubit, Mass Increase Ratio and Normalized Inradius.
  • Additional selection methods from the context menu.
  • Improved control of snapping higher order nodes to geometry.
  • Spider blocks are now geometry-aware and can be automatically regenerated when geometry is modified.
  • New reduce options have been added to rapidly prepare a bolt for analysis. Bolts can be identified with the geometry power tool, which uses machine learning to identify volumes as bolts.
  • Sculpt has several new options and improvements. Meshes of up to 2.1 billion elements can be exported. Sidesets can be matched to more precisely match the boundary. Names can be associated with materials, nodesets, and sidesets. Also, sidesets and nodesets may be specified based on xyz bounding box boundaries.
  • Uniform Mesh Refinement (UMR) tool “extra” is now packaged with CUBIT™.  The “extra” tool uses an efficient streaming pipeline with low memory requirements. On recent CPUs with an SSD (solid state drive), UMR can write a refined mesh up to 4 billion elements in only a few minutes and millions of elements in seconds.
  • User contributions to the Python script library continue to grow. These scripts are tested nightly against multiple versions of CUBIT™ on all three platforms. New CubitInterface functions have been implemented to support Python scripting.

Limitations in CUBIT™ 15.8

How to Get it…

CUBIT™ is available to anyone on the Sandia LANs. CUBIT™ 15.8 will now run automatically from the Linux command prompt, replacing CUBIT™ 15.7. It is also licensed free of charge for government use outside of Sandia. If you are a current CUBIT™ licensed user, you may download CUBIT™ 15.8 from the CUBIT™ Download Webpage. See CUBIT™ Licensing for information on obtaining a license.

How You Can Learn More…

The CUBIT™ 15.8 Release Notes provide a description of all the new features included in CUBIT™ 15.8. For detailed information follow the links to the online users manual.

Classroom tutorials are advertised on the CUBIT™ Tutorial Webpage, where you can also find a download for self-guided tutorials.

For more information contact Roshan Quadros.

CUBIT™ 15.7 Released October 20, 2020

The CompSim-Geometry and Meshing Team is pleased to announce Version 15.7 of the CUBIT™ Geometry and Mesh Generation Toolkit. The following is a sampling of new capabilities and improvements introduced in CUBIT™ 15.7. See the CUBIT™ 15.7 Release Notes for a complete list, which includes capabilities developed in support of Next Generation Simulation (NGS)

What’s New…

  • Composite Tet10 Meshing enhancements include new normalized inradius metric, commands for collapsing poor quality tri/tet elements, options to name mesh intersection group, and new criteria for node projection.
  • Sculpt has been enhanced to better fit the overlay grid to the input STL geometry by associating grid edges to STL curves. Also, improved color smoothing , a new option to automatically insert void material , and a new option to select the htet method for splitting hexes in to tets has been implemented.
  • New machine learning research capabilities such as classifying common mechanisms parts, simplifying these parts, and suggesting defeaturing tools to improve meshing outcome have been made production ready. New assembly diagnostics , visualization, and resolution for gaps, overlaps, misalignments, contacts and mergeable entities have been implemented.
  • Uniform Mesh Refinement (UMR) tool now uses an efficient streaming pipeline with low memory requirements. On recent CPUs with an SSD (solid state drive), UMR can write a refined mesh up to 4 billion elements in only a few minutes and millions of elements in seconds.
  • New Gitlab repository has been created to manage user-developed Python scripts. These scripts are tested nightly against multiple versions of CUBIT™ on all three platforms. New CubitInterface functions have been implemented to support Python scripting.
  • New GUI improvements include enhancements to tetmesh and trimesh command panels , custom options for reduce command, and context menus for “Draw Volume Overlap”, “Draw With Nearby”, and “Draw with Neighbors”.
  • When naming entities in CUBIT™, names are now case insensitive. If a model contains volumes with same name, the volume names will be automatically modified during import. Please refer to the user manual if you want the old behavior.

Limitations in CUBIT™ 15.7

How to Get it…

CUBIT™ is available to anyone on the Sandia LANs. CUBIT™ 15.7 will now run automatically from the Linux command prompt, replacing CUBIT™ 15.6. It is also licensed free of charge for government use outside of Sandia. If you are a current CUBIT™ licensed user, you may download CUBIT™ 15.7 from the CUBIT™ Download Webpage. See CUBIT™ Licensing for information on obtaining a license.

How You Can Learn More…

The CUBIT™ 15.7 Release Notes provide a description of all the new features included in CUBIT™ 15.7. For detailed information follow the links to the online users manual.

Classroom tutorials are advertised on the CUBIT™ Tutorial Webpage, where you can also find a download for self-guided tutorials.

For more information contact Roshan Quadros.