Absolute Tolerance

Use the Absolute Tolerance node () if you want to set the default absolute tolerance for a dependent variable.

To add an Absolute Tolerance node:

1	Right-click Study/Solver Defaults () and select Time-Dependent Solver () from the Solvers menu, then

2	Right-click Time-Dependent Solver to add Absolute Tolerance as a subnode.

The Settings window has the following sections:

General

In the Dependent variable reference and Physical quantity lists, you specify what dependent variable to change the absolute tolerance for. See Dependent Variable Declaration for more information about the dependent variable reference. Use the option Use field name in the Dependent variable reference list to specify a variable defined as a degree of freedom.

Absolute Tolerance

Set the absolute tolerance method in the Method list.

See Time-Dependent Solver in the COMSOL Multiphysics Reference Manual for more information about setting absolute tolerances.