COMSOL Multiphysics™

extrude
Purpose
extrude
Extrude a 2D geometry object into a 3D geometry object.
Syntax
Description
g3 = extrude(g2,...)
g3 = extrude(g,...) extrudes the 2D geometry object g into a 3D geometry
object g3 according to given parameters.
The function extrude accepts the following property/values:
TABLE 1-21: VALID PROPERTY/VALUE PAIRS
PROPERTY VALUES DEFAULT DESCRIPTION
Displ 2-by-nd matrix [0;0] Displacement of extrusion top
Distance k-by-nd matrix 1 Extrusion distances
Face string ’all’ Cross-sectional faces to delete
Polres scalar 50 Polygon resolution
Scale 2-by-nd matrix [1;1] Scale of extrusion top
Twist 1-by-nd vector 0 Twist angle (in radians)
Wrkpln 3-by-3 matrix [0 1 0;
0 0 1;
0 0 0]
Work plane for 2D geometry
cross-section
The 3D object g3 is an extruded object, where Distance is the extrusion distance
in the normal direction of the bottom plane, defined by the property Wrkpln.
The properties Displ, Scale, and Twist defines the translation displacements, scale
factors and rotation of the top with respect to the bottom of the extruded object.
They are defined in the local system of the work plane.
To define a piecewise linear extrusion, Distance is given as a row vector, of size
1-by-nd, of displacements with respect to the bottom work plane. Scale, Displ
and Twist need to have the same number of columns as Distance.
To define a cubic extrusion Distance is given as a 3-by-nd matrix where rows 2 and
3 contain weights of the extrusion segments. The weights are given in the interval
[0 1] and specifies the influence of the tangential continuity at the junctions. The
weights of rows 2 and 3 specifies the influence from the first- and second-junction,
respectively, of each segment. If the weight is close to 0, the influence of the
junction is weak, and if it is close to 1, the influence is strong.
Polres defines the resolution in the polygon representations of the edges.
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