COMSOL 6.4 - DeleteSliverFaces

DeleteSliverFaces

Find and delete sliver faces in CAD objects.

Syntax

model.component(<ctag>).geom(gname).feature().create(<ftag>,"DeleteSliverFaces");

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

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

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

model.component(<ctag>).geom(<tag>).feature(<ftag>).find();

model.component(<ctag>).geom(<tag>).feature(<ftag>).detail();

model.component(<ctag>).geom(<tag>).defeaturing("SliverFaces").selection(property);

model.component(<ctag>).geom(<tag>).defeaturing("SliverFaces").set(property,<value>);

model.component(<ctag>).geom(<tag>).defeaturing("SliverFaces").find();

model.component(<ctag>).geom(<tag>).defeaturing("SliverFaces").detail();

model.component(<ctag>).geom(<tag>).defeaturing("SliverFaces").delete(<ftag>);

model.component(<ctag>).geom(<tag>).defeaturing("SliverFaces").deleteAll(<ftag>);

Description

model.component(<ctag>).geom(<tag>).defeaturing("SliverFaces").delete(<ftag>) creates a DeleteSliverFaces feature tagged <ftag> with the specified properties. The property delete is set to selected. If the feature can be built, it is inserted in the geometry sequence after the current feature; otherwise, the feature is discarded.

model.component(<ctag>).geom(<tag>).defeaturing("SliverFaces").deleteAll(<ftag>) works as the delete method, but the property delete is set to all.

It is also possible to create a DeleteSliverFaces feature using the standard create method. The following properties are available.

Table 3-12: Available Properties.
Property	Value	Default	Description
delete	all \| selected	selected	Delete all sliver faces of given width, or a selection. Only available for the feature.
entsize	double	1e-3	Maximum face width.
input	Selection		Names of input objects.
selresult	on \| off	off	Create selections of all resulting objects.
selresultshow	all \| obj \| dom \| bnd \| edg \| pnt \| off	dom	Show selections of resulting objects in physics, materials, and so on, or in part instances. obj is not available in a component’s geometry. dom, bnd, and edg are not available in all features.
contributeto	String	none	Tag of cumulative selection to contribute to.

Sliver faces are narrow but long faces with large aspect ratio, which usually give rise to extremely fine local meshes in their vicinity.

model.component(<ctag>).geom(<tag>).feature(<ftag>).find() searches the input objects for faces with width less than entsize.

model.component(<ctag>).geom(<tag>).feature(<ftag>).detail() returns a selection object where you can select a subset of the faces found.

The find and detail methods of model.component(<ctag>).geom(<tag>).defeaturing("SliverFaces") have the corresponding functionality for the defeaturing tool.

Only faces that can be deleted without invalidating the object are deleted. If a face was not possible to delete, a warning message is given.

Compatibility

The following property is no longer supported:

Table 3-13: Obsolete Properties.
Property	Value	Default	Description
Out	stx \| ftx \| ctx \| ptx \| status	none	Output variables

Example

The following example imports the geometry model from the file defeaturing_demo_5.x_b, finds sliver faces narrower than 2·10−3, and deletes the first of these.

Model model = ModelUtil.create("Model1");

model.component.create("comp1");

model.component("comp1").geom().create("geom1",3);

model.component("comp1").geom("geom1").feature().create("imp1","Import");

model.component("comp1").geom("geom1").feature("imp1").set("filename", "defeaturing_demo_5.x_b");

model.component("comp1").geom("geom1").runAll();

model.component("comp1").geom("geom1").feature().create("dsl1","DeleteSliverFaces");

model.component("comp1").geom("geom1").feature("dsl1").selection("input").set("imp1");

model.component("comp1").geom("geom1").feature("dsl1").set("entsize",2e-3);

model.component("comp1").geom("geom1").feature("dsl1").find();

model.component("comp1").geom("geom1").feature("dsl1").detail().setGroup(1);

model.component("comp1").geom("geom1").runAll();