COMSOL Multiphysics™

postint
Purpose
postint
Integrate expressions in domains with arbitrary space dimension.
Syntax
Description
[v1,v2,...,vn] = postint(fem,e1,e2,...,en,...)
[v1,i2,...,vn] = postint(fem,e1,e2,...,en,...) returns the integrals
v1,v2,...,vn of the expressions e1,...,en. The integrals can be evaluated on any
domain type: subdomain, boundary, edge, and vertex, using one or several
solutions. When the several solutions are provided, each vi is a vector with values
corresponding to the solutions.
The expressions that are integrated can be expressions involving variables, in
particular application mode variables.
postint accepts the following property/value pairs:
TABLE 1-28: VALID PROPERTY/VALUE PAIRS
PROPERTY
NAME
PROPERTY VALUE DEFAULT DESCRIPTION
Const cell array List of assignments
of constants
Dl integer vector all domains Domain list
Edim integer full Element dimension
Frame string spatial frame Coordinate frame
Geomnum positive integer 1 Geometry number
Intorder positive integer See below Integration order
Phase integer vector 0 Phase angle
Solnum integer vector | See below
Solution numbers
all | end
T double vector See below Time for evaluation
U
solution object or
vector
fem.sol or 0
Solution(s) for
evaluation
The expressions ei are integrated for one or several solutions. Each solution
generates an element in the output vectors vi. The properties Solnum and T control
what solutions are used for the evaluations. If Solnum is provided, the solution
indicated by the indices provided with the Solnum property are used. It T is
provided, solutions are interpolated The property T can only be used for time
dependent solutions. If nether Solnum nor T is provided, a single solution is
evaluated. For parametric and time-dependent solutions, the final solution is used.
For eigenvalue solution the first solution is used.
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