Use the Force Calculation node to define globally available force and torque variables for the selected domains.
Enter a Force name, which is then appended to global variables. The method used to compute forces and torques is integration of the Maxwell’s stress tensor over the exterior surfaces of the set of domains. This feature also gives access to the normal component of the Maxwell stress tensor on the external surfaces. The computed force is made available as a global vector variable with name
<name>.Force<component>_<force name>, where
<name> is the
Name of the physics interface.
Enter a direction vector for the Torque axis rax and coordinates for the
Torque rotation point r0. A torque calculation about a given point (
Torque rotation point) is made and defined as a global vector variable,
<name>.T<component>_<force name>. The resulting torque component parallel to the given
Torque axis is given as a global scalar variable, typically
<name>.Tax_<force name>.
In frequency domain studies, the cycle-averaged force and torque variables are also defined, with names <name>.Forceav<component>_<force name>,
<name>.Tav<component>_<force name> and
<name>.Taxav_<force name>. The variables described are still defined and represent the instantaneous force and torque.
The Compute both instantaneous and cycle-averaged variables in the frequency domain check box is selected by default. This check box controls which variables are defined by the Force Calculation feature in frequency-domain studies. When selected (the default setting in new models), the variables are defined as described above. This check box selected by default for backward compatibility. If the check box is cleared, only the cycle-averaged variables are computed, replicating the behavior of the Force Calculation feature in version 4.3 and earlier. The check box is cleared in existing Force Calculation features when opening models created in version 4.3 and earlier.
) and select Advanced Physics Options in the Show More Options dialog box.