COMSOL Multiphysics™

adaption
TABLE 1-1: VALID PROPERTY/VALUE PAIRS
PROPERTY VALUE DEFAULT DESCRIPTION
Resorder scalar | vector 0 Order of decrease of
equation residuals
Rmethod regular | longest | longest Refinement method
meshinit
Solver stationary |
eigenvalue
stationary Solver type
Tpfun fltpft |
fltpworst |
fltpqty
Tppar Nonnegative real
number
fltpft
Element selection
method
Parameter to the element
selection method
In addition, the common solver properties listed under femsolver are available.
Also, when using the stationary solver type, the properties listed under
femstatic apply, and for the eigenvalue solver type the properties in femeig
apply. See therefore the entries femsolver, femstatic and femeig for more
information about the property/values.
Algorithm
The algorithm solves a sequence of PDE problems using a sequence of refined
meshes. The first mesh is obtained from the mesh field in the FEM structure. The
following generations of meshes are obtained by solving the PDE problem,
computing a mesh element error indicator based on the error estimate function,
selecting a set of elements based on the element pick function, and then finally
refining these elements. The solution to the PDE problem is then recomputed. The
loop continues until the maximum number of element generations has been
reached, or until the maximum number of elements is obtained.
The PDE problem is stored in the FEM structure fem. See femstruct for details.
The adaptive solver works in one geometry at a time. The geometry number is
specified in the property geomnum. The solver does only support simplex meshes.
The residual computation method weak support all solution forms. The residual
computation method coefficient does not support the solution form weak, weak
contributions or constraints on subdomains.
First, the solver chosen by the property Solver is called.
Error Estimation
Then, the residuals in the equations are computed for all mesh elements. The error
estimation function given by the property Eefun is called with parameter Eepar.
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