With the Solid body motions feature, the movement of the entire simulation domain as a whole can be simulated. This feature is currently available in transient Incompressible and Multiphase fluid dynamics simulations only.
Solid body motions does not require any special mesh preparation as the motion is applied to the entire domain. This means the user is also not required to assign any specific parts of the CAD model. However, it is important to make sure that the mesh is of high quality so the prescribed motion can be resolved accurately.
Solid Body Motion Setup
In the simulation tree, navigate to Advanced Concepts and add solid body motions. Several motion types are supported:
Linear motion This type assigns a linear motion to the domain by specifying the velocity components.
Oscillating rotating motion This type allows an oscillating motion around the rotation center. The user needs to specify a point on the axis, the amplitude vector, and the angular velocity.
Oscillating linear motion It defines an oscillating linear motion using amplitude vector and angular velocity. We suggest watching this video to get a hold of what this motion looks like.
Rotating motion It helps to model the rotating motion of the domain. It can be defined in two ways:
Angular rotation: The user needs to specify the axis of rotation, a point on this axis, and the angular velocity. This type also supports time-dependent angular velocity changes.
Vector rotation: The user needs to specify a point on the axis of rotation and each component of angular velocity.
Ship design analysis (SDA) This type mimics the movement of a floating body by specifying parameters like sinusoidal roll, heave, and sway components of motion.