Set Up Mesh Motion

Use the Settings tool to define the mesh motion equation to be solved.

  1. From the Motion ribbon, click the Settings tool.

    Figure 1.
    The Setup dialog opens.
  2. Select a mesh motion equation.
    Option Description
    Eulerian Make mesh fixed. All defined motion will be ignored and mesh in domain will not deform.
    Arbitrary Add the ability to move the mesh arbitrarily based on external influence. Can be utilized to simulate a viscoelastic material or to simulate solid/structural direct coupling.
    Specified Enable mesh movement based on the motion or constraints defined on surfaces and solids.
  3. Optional: Turn on external code.
    External code can be used to solve Direct Coupling Fluid Structure Interaction (DC-FSI) problems.
    1. Click the External code option under Settings and activate the checkbox.
    2. Define MotionSolve (rigid body solver) or OptiStruct (structural solver) as the external solver.
    3. Define a communication type.
    4. If needed, define a multiplier function to scale fields or input/output coefficients to filter fields.
      Click to edit a selected multiplier function.
Tip: If you click Solver controls and deactivate Mesh deformation, the motion equation will not be solved and all definitions will be ignored.