COMSOL 6.3 - LogicalExpression

model.component(<ctag>).mesh(<tag>).create(<ftag>,"LogicalExpression");

model.component(<ctag>).mesh(<tag>).feature(<ftag>).selection();

model.component(<ctag>).mesh(<tag>).feature(<ftag>).set(property,<value>);

model.component(<ctag>).mesh(<tag>).feature(<ftag>).getType(property);

Use model.component(<ctag>).mesh(<tag>).create(<ftag>,"LogicalExpression") to split entities of an imported mesh by specifying an element set based on a logical expression.

Use model.component(<ctag>).mesh(<tag>).feature(<ftag>).selection() to specify the geometric entities for which you want to define an element selection. If you do not specify the selection, the feature operates on the entire geometry.

Table 4-24: Available Properties.
Property	Value	Default	Description
expression	String	1	Logical expression, where the valid variables are: x, y, and z; h and qual; and istri, isquad, istet, ispyr, isprism, ishex, and meshelement.
condition	allvertices \| somevertex	allvertices	Condition for inclusion of an element.
seltrue	on \| off	off	Create selection of all entities in the region where the logical expression is true.
selfalse	on \| off	off	Create selection of all entities in the region where the logical expression is false.

Table 4-24: Available Properties.

Logical expression, where the valid variables are: x, y, and z; h and qual; and istri, isquad, istet, ispyr, isprism, ishex, and meshelement.

condition

allvertices | somevertex

allvertices

Condition for inclusion of an element.

seltrue

on | off

off

Create selection of all entities in the region where the logical expression is true.

selfalse

on | off

off

Create selection of all entities in the region where the logical expression is false.

Table 4-25: Available Additional Properties When seltrue and selfalse are SET to on.
Property	Value	Default	Description
colortrue	none \| custom \| integer between 1 and the number of colors in the current theme	none	The color of the domain selection, either given as an integer indicating a color in the color theme, or as a custom color in the customcolortrue property.
colorfalse	none \| custom \| integer between 1 and the number of colors in the current theme	none	The color of the domain selection, either given as an integer indicating a color in the color theme, or as a custom color in the customcolorfalse property.
customcolortrue	RGB-triplet	Next available theme color	The color to use. Active when colortrue is set to custom.
customcolorfalse	RGB-triplet	Next available theme color	The color to use. Active when colorfalse is set to custom.
seltrueshow	all \| dom \| bnd \| pnt \| off	dom	Show the selection on the specified entity level in physics, materials, and so on. For mesh parts, this option shows selection outside the part.
selfalseshow	all \| dom \| bnd \| pnt \| off	dom	Show the selection on the specified entity level in physics, materials, and so on. For mesh parts, this option shows selection outside the part.

Table 4-25: Available Additional Properties When seltrue and selfalse are SET to on.

none | custom | integer between 1 and the number of colors in the current theme

none

The color of the domain selection, either given as an integer indicating a color in the color theme, or as a custom color in the customcolortrue property.

colorfalse

none | custom | integer between 1 and the number of colors in the current theme

none