Defining Motion

Select the appropriate motion models to simulate the deformation of the fluid and solid regions under the external load on the pipe. For the solid region, define a Solid Displacement motion, that allows the pipe mesh to deform in real time based on the computed displacements. For the fluid region, define a Morphing motion, that allows the fluid mesh to deform based on the displacements mapped at the interface.

  1. Right-click the Tools > Motions node and select New > Morphing.
  2. Repeat the previous step and select New > Solid Displacement.
To assign the motion models to the fluid and solid regions:
  1. Expand the Regions > Fluid > Physics Values node.
  2. Select the Motion Specification node and set Motion to Morphing.
  3. Expand the Regions > Pipe > Physics Values node.
  4. Select the Motion Specification node and set Motion to Solid Displacement.
Simcenter STAR-CCM+ automatically sets the morpher method for the fluid boundary representing the fluid-structure interface to Solid Stress. Set the pipe contact boundary to follow the interface motion:
  1. Expand the Regions > Fluid > Boundaries node.
  2. Select the pipe contact > Physics Conditions > Morpher Specification node and set Specification to Floating.
  3. Save the simulation.