Download - Meshing 3DSolids CAEA 2
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ANSYS Workbenches ng
August 30, 2012
2012 CAE Associates
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How Do I Get a Brick Mesh?
3D solid elements generally come in a few basic shapes:
Hexahedron (hexas, bricks)
, ,
Tetrahedron (tets) Pyramid (less common, but essential for mixing tets and bricks)
Hex Pyramid TetWedge
It takes approximately 5-6 tetrahedrons to fill 1 brick.
Fewer elements lead to faster solution times
Hexahedron meshes are enerall more uniform
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Easier control of the element distribution
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How Do I Get a Brick Mesh?
Brick meshes always take more man-time than tetrahedral meshes.
Brick meshes are usually created using one or more of the following
Slice and dice the solid geometry to create 6-faced volumes, each face having 3 or4 boundary curves.
Create a 2D mesh of quadrilaterals and sweep or extrude the 2D mesh to create 3D
r c s. yp ca opera ons nc u e:
Revolve the mesh about an axis.
Sweep the mesh along one or more curves.
Sweep a surface mesh from one face of a volume to a topologically similar face on the
opposite face of a volume.
Brick meshes can also be created with advanced meshing methods.
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How Do I Get a Brick Mesh?
. ,an all-brick mesh can be created with some effort by the user.
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How Do I Get a Brick Mesh?
DesignModeler and forming the
resulting bodies into a part, we
can et a collection of swee able
bodies.
3 elements through the thickness
of the thin walls.
The resulting mesh of higher
order elements contains 8,208
, .
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How Do I Get a Brick Mesh?
tetrahedron mesh resulting from
the unaltered geometry is shown
to the ri ht.
Again, the mesh is generated to
thickness of the thin walls and is
meshed with very little effort.
The resulting mesh of higher
order elements contains 84,168
,
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Mesh Methods
Sweep requires topologically consistent source and target faces (same number
of vertices per face with a smooth path from the source to the target).
,
it is free meshed with tetrahedral elements. Specify manual source (and target faces) when:
There exists more than one possible sweep direction
You want to sweep mesh a thin solid with a single element through the thickness
You want to inflate the mesh near the surface of the geometry
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Mesh Methods
The number of elements in the sweep direction along with the bias settings are
also set in the sweep details.
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Mesh Methods
outer surface topology and sweeps inward. It blends the disparate hex
mesh patterns internally using wedges, pyramid and tetrahedral elements.
surface area ratio.
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Mesh Methods
dominant.
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Mesh Methods
ICEM Advanced Meshing Module) that internally segments bodies into
topologically consistent pieces.
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Combining Methods
are formed into a part.
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Selective Meshing
. Named selections are created and sent to the solver (element components).
Note: The automatic method is still used for mixed order meshing of parts.
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Summary
Many different options within ANSYS Meshing for generating a brick mesh
Ease of use of ANSYS Workbench makes generating brick meshes
simpler
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