COMSOL Multiphysics™

meshcaseadd
The mesh case generation method is determined by the property Mgauto. The new
mesh cases will be given the numbers mcmax+1, ..., mcmax+n, where mcmax is
the current highest mesh case number.
• If Mgauto=both, shape, or meshscale, then the new mesh cases are constructed
starting from the mesh case given in the property Mcaseorig (this should be a
single nonnegative integer). This process is described in the section
“Constructing a Multigrid Hierarchy” on page 423 in the COMSOL
Multiphysics User’s Guide, where the methods are called Coarse mesh and lower
order (both), Lower element order first (shape), and Coarse mesh (meshscale).
The mesh coarsening factor is given in the scalar Meshscale, the shape function
order change amount is given in the scalar Shapechg, and the number of new
mesh cases to create is given by the property Nmcases.
• If Mgauto=explicit, then new mesh cases are constructed starting from the
mesh case(s) given in the property Mcaseorig. The properties Mcaseorig,
Meshscale and Shapechg should be vectors of the same length n (however if one
is scalar, it is expanded to the same length as the other). Mesh case mcmax+i will
have a mesh that is coarsened with the factor Meshscale(i), and shape function
orders incremented with Shapechg(i) relative to mesh case Mcaseorig(i).
• If Mgauto=meshrefine, then the new mesh cases are constructed by refining the
mesh in mesh case Mcaseorig (this should be a single nonnegative integer)
repeatedly. The number of new mesh cases to create is given by the property
Nmcases. The refinement method can be specified using the property Rmethod,
see meshrefine.
The default value of Mgauto is as follows. Let n be the maximum length of the
vectors Meshscale, Mcaseorig, Shapechg. The default for Mgauto is shape if n=1,
and explicit if n>1.
The following fields in the FEM structure are affected by meshcaseadd:
mesh, shape, gporder, ***.gporder, cporder, and ***.gporder, where *** is
equ, bnd, edg, or pnt. Also, the corresponding fields in the appl field are affected.
See Also
femsolver, meshcasedel
251