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By Erling Eklund, GAMBIT Product Manager
View the pdf of this article
This GAMBIT mesh illustrates improved quad paving using the new 2D curvature
size function and HexCore meshing using the surface mesh size function
GAMBIT
In GAMBIT 2.2, planned for a summer
2004 release, the focus continues
to be on CAD import, geometry conditioning,
and automatic meshing.
Several new features have been added
to help streamline CAD import. The
IGES, CATIA V4, STEP, and Parasolid
CAD translators can now be upgraded
for 2.2 and subsequent releases
of GAMBIT. A new smoothing algorithm,
together with enhanced
healing, will provide high quality surfaces
after import. Holes in the model
can easily be patched with the much-enhanced
cleanup hole tool, and duplicate
faces are automatically removed
or connected, providing a clean geometry,
ready for volume creation. Multi-volume
stitching is now fully
automatic and the fluid domain can
now be obtained easily using
GAMBIT’s powerful Boolean operators.
For disconnected assemblies,
GAMBIT’s improved face connect
capability seamlessly hooks parts
together, making them ready for the
fully automatic conditioning tools.
These tools make for quick removal
of unwanted features such as short
edges, sliver faces, and sharp angles.
The art of providing an optimal
mesh density variation is left to the
size functions in GAMBIT 2.2. With
speed improvements ranging from
fifty to several hundred percent, and
a number of new functionalities
(meshed source and 2D curvature,
for example), GAMBIT is a state-of-the-art meshing tool. In addition, the
automatic unstructured quad paver,
as well as the boundary layer capability
have seen several enhancements
related to functionality, quality, and
stability.
The new HexCore meshing capability in TGrid is illustrated for a cabin interior
TGrid
TGrid 3.6 was released in March with a new HexCore
meshing capability, previously only available in
GAMBIT. Passing over forty industrial test cases using
the HexCore technology, with cell counts reaching
7 million, TGrid 3.6 continues to be the best-in-class
volume mesher for the automotive industry. Mesh density
distribution can be controlled both locally and globally,
and the Cartesian mesh is automatically adjusted
to prism layer growth for minimal cell count at maintained
quality levels. The combination of overall cellcount
reduction and increased cell quality results in better
CFD solutions and increased productivity.
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