Use a Shared Quantity Definition node () to define quantities that are shared among several features in the physics interface — for example, to control mesh or solver settings.

To add a Shared Quantity Definition, first add a Component, Feature, or Property node then:

The Settings window has the following sections:

From the Shared quantity list, select a quantity to share (for example, Minimum wavelength, which can be a quantity useful for determining a suitable mesh size).

Enter a suitable name for the shared quantity variable in the Variable name field. Also, enter an expression for the variable in the Expression field.

The options in the Selection list and Output entities list define the selection where this variable definition is valid.