Body Load
The Body Load node adds a general volumetric load to the selected domain. The feature can be used to approximate sources of complex external processes.
Force
Select a Load type — Force per volume, Total force, or for 2D components, Force per area.
Then enter values or expressions for the components in the force vector based on the space dimension. These can be general time-dependent expressions or data from interpolation functions.
For Total force COMSOL Multiphysics divides the total force by the volume of the domains where the load is active.