When you add a Gravity node, gravity forces are applied to all selected features in the physics interface with a density, mass, or mass distribution. Here, you select domains, and all objects with a lower dimensionality that belong to the selection are also automatically included.
The gravitational load acts in a fixed spatial direction. The load intensity is g = ρ g eg, where
g as a default is the acceleration of gravity (a predefined physical constant). Therefore, in the frame of the rotor, it appears as a rotating load and is modeled as so. In stationary analysis, only the component of the gravity along the axis of the rotor is used. The action of gravity can also be seen as a linearly accelerated frame of reference.
The Global coordinate system is selected by default. The
Coordinate system list contains any additional coordinate systems that the model includes. It can be used when prescribing the direction of the gravitational forces.
Enter the components of the Gravity g. The default value is
g_const, which is the physical constant with a value of
9.8066 m/s
2. The default is that the gravity acts in the negative z direction.