COMSOL Multiphysics™

multiphysics
appl.dim provides the dependent variable names. The default is obtained from the
application mode for physics modes. For PDE modes with no mode field and with
a numeric appl.dim, default variable names are substituted according to the global
position in the system.
appl.elemdefault contains a string indicating what kind of element is the default
in this application. This method is used to generate the defaults for
appl.XXX.gporder, appl.XXX.cporder, appl.shape, appl.XXX.shape, and
appl.sshape. See elemdefault for a list of valid strings.
appl.edg is a structure with fields describing the edge data. The structure contains
one field for each of the application-specific edge parameters, with the field name
equal to the parameter name. Each field should be a cell array containing data for
the edges.
appl.equ is a structure with fields describing the PDE data on subdomains. The
structure contains one field for each of the application-specific PDE parameters,
with the field name equal to the parameter name. Each field should be a cell array
containing data for the subdomains.
appl.mode is a string with the name of the application mode or an application mode
object. If the appl.mode field is omitted, the application structure can be used to
describe ordinary coefficient/general/weak form PDE problem. This is useful in
the definition of multiphysics problems, where coefficient/general/weak form
models can be combined with application mode models. See the COMSOL
Modeling Guide for a description of the application-specific data for each
application mode.
appl.pnt is a structure with fields describing the point data. The structure contains
one field for each of the application-specific point parameters, with the field name
equal to the parameter name. Each field should be a cell array containing data for
the points.
appl.shape is a cell array of shape function objects.
appl.sshape is an integer giving the order of geometry approximation.
The fields fem.XXX.shape and fem.xxx.shape are ind-based cell arrays of vectors
pointing to elements of appl.shape. Indicates which shape functions to use in each
domain group. An empty vector indicates that no shape functions are used in this
domain group. Zero indicates that the affected domain group should use defaults
or inherit shape functions. Appl.XXX.shape takes defaults, whereas
appl.xxx.shape inherits from appl.XXX.shape. Where there is a conflict over
306 | CHAPTER 1: COMMAND REFERENCE