COMSOL Multiphysics™

meshrefine
Purpose
meshrefine
Refine a mesh.
Syntax
Description
fem.mesh = meshrefine(fem,...);
fem = meshrefine(fem,'Out',{'fem'},...);
fem.mesh = meshrefine(fem,...) returns a refined version of the triangular
mesh specified by the geometry, fem.geom, and the mesh, fem.mesh.
fem = meshrefine(fem,'Out',{'fem'},...) modifies the FEM structure to
include the refined mesh in fem.mesh.
meshrefine is supported for meshes containing simplex elements only, that is, lines,
triangles, and tetrahedrons.
The function meshrefine accepts the following property/values:
TABLE 1-13: VALID PROPERTY/VALUE PAIRS
PROPERTY VALUE DEFAULT DESCRIPTION
mcase integer 0 Mesh case number
out fem | mesh mesh Output variables
rmethod longest | see below Refinement method
regular
subdomain integer vector | all
| none
all
Specifies the subdomains
that are refined
tri
one row vector or
two row matrix
all elements
once
List of elements to refine
(second row is number
of refinements)
The default refinement method in 2D is regular refinement, where all of the
specified triangles are divided into four triangles of the same shape. Longest edge
refinement, where the longest edge of each specified triangle is bisected, can be
demanded by giving longest as Rmethod. Using regular as Rmethod results in
regular refinement. Some triangles outside of the specified set may also be refined,
in order to preserve the triangulation and its quality.
In 3D, the default refinement method is longest. The regular refinement method
is only implemented for uniform refinements.
In 1D, regular refinement, where each element is divided into two elements of the
same shape, is always used.
Examples
Refine the mesh of the L-shaped membrane several times and plot the mesh for the
geometry of the L-shaped membrane:
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