**build_ellipse
#
Description#
This command builds the surface mesh of an ellipse using s3d3 elements.
Synatx#
**build_ellipse
[ *name
name ]
*center
(center)
*normal
(normal)
*dir
(direction)
*ra
ra
[ *rb
rb ]
*nb_nodes
nb_nodes
*name
the name of the elset; by default “ellipse”
*center
the center of the ellipse; by default center = (0,0,0)
*normal
the normal to the ellipse plane; by default normal = (0,0,1)
*dir
the direction of the ellipse; by default dir = (1,0,0)
*ra
the radius in
dir
-axis*rb
the radius in the normal to
dir
-axis. If not given, the value ofrb
is set to be equal tora
.*nb_nodes
the number of nodes to build the ellipse. Default value
nb_nodes
= 16.
Example#
***mesh
**build_ellipse
*center ( 0.00000 0.00000 0.00000 )
*normal ( 0.00000 1.00000 1.00000 )
*dir ( 1.00000 0.00000 0.00000 )
*ra 2.00000
*rb 4.00000
*nb_nodes 10
This example creates a mesh of an ellipse surface in 3D.
**mesh_quarter_disk
#
Description#
This command creates the mesh of the quarter of an elliptic disk using quadrilateral elements.
Syntax#
**mesh_quarter_disk
*radius
radius]
*ncut_radius
cut_rad]
*ncut_theta
cut_theta ]
*ncut_height
cut_y ]
*start_at
start || *anisotropy
aniso ]
*use_triangles
]
*quad
]
radius
The radius of the disk.
ncut_radius
the number of subdivisions along the radius.
ncut_theta
the number of subdivisions along theta.
ncut_height
for elliptic disks, the number of subdivisions in the y-direction. By default, ncut_y = ncut_rad.
start_at
consider only the section of the quarter disk having
. It creates an anisotropic mesh but not elliptical.anisotropy
to build an elliptic disk (with radius*aniso and radius are the values of semi-major/minor axes). For a circular disk,
.quad
a flag to set quadratic interpolation.
use_triangles
a flag to use triangular elements to mesh the disk (By default c2d4/c2d8 are used). By setting this option, this mesher becomes similar to **build_ellipse.
Example#
****mesher
***mesh disk.geof
**mesh_quarter_disk
*ncut_radius 12
*ncut_theta 16
*ncut_height 8 % or 12 for the circular disk
*anisotropy 1.5 % or 1. for the circular disk
****return