Moving Frame Domain Condition
If the physics interface controls the deformation of the material or the spatial frame, use this node to specify how the frame is deformed on a certain selection. The physics interface controls the frame deformation if the Deformed mesh check box in the physics interface node is selected.
The Moving Frame Domain Condition node () allows specifying two types of frame deformation, using the Frame motion list box:
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When Free (the default) is selected, the coordinates of the moving frame in the chosen selection will be added as dependent variables for the problem. Specify a Smoothing equation to use to govern the motion of the coordinates, one of Laplace (the default), Hyperelastic, Yeoh, or Winslow. See to the documentation for the Moving Mesh interface for more details on each smoothing equation. Specify also an expression for the Initial values for displacement as a 3-components vector. The initial values must not depend on the coordinates of the moving frame (but can depend on the coordinates of the reference frame). In order for the model to be solvable, appropriate Moving Frame Boundary Conditions must be applied on the boundaries of Free domain. The Free frame motion is only supported for top-entity-level selections (domain conditions).
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When Prescribed displacement is selected, the frame motion is determined by the Expression entered (a 3-component vector). The expression cannot depend on the coordinates of the moving frame, but it can depend on the coordinates of the reference frame. The Prescribed displacement condition can be applied on selections of all entity level. For example, it can be used to prescribe the motion of boundaries or edges, in addition to domains.
In the Selection section, specify the selection on which the condition is to be applied. Free frame motion is only supported for top-entity-level selections (domain condition).
Only one entity in the entire model can be responsible for the frame motion on a certain selection. Multiple Moving Frame Domain Condition in the same physics applied on the same selection will cause an error when trying to solve the model.
The node supports the Input Dependency subnode to provide more flexibility in the setup.