Setting up Morpher Motion and Solver

You can model mesh morphing in Simcenter STAR-CCM+ using either RBF or BSpline interpolation methods for defining the deforming surfaces.

  1. Right-click the Continua > [physics continuum] > Models node and choose Select Models... In the models selection dialog, choose, as a minimum, one of the options from the Space Group Box (for example, Three Dimensional) and one of the models from the Time Group Box.
  2. Create a morphing motion and set its properties:
    1. Right-click Tools > Motions and select New > Morphing.


      A new Morphing node appears under Motions. The RBF morpher is selected by default and the RBF Parameters node appears underneath the parent node.

    2. Select the Morphing node and set the Morphing Order to either Motionwise or Regionwise (see Morpher Motion Reference topic).
    3. For Morphing Method, choose between BSpline and RBF
    4. If the morphing motion is a combination of linear motion and deformation, on the [morpher method] Parameters node, activate Linear Fitter.
    5. For the RBF morpher only, on the RBF Parameters node, activate Automatic Thin-out and set the Automatic Thin-out Cl factor.
  3. For each region to which the morphing motion applies, select Regions > [region] > Physics Values > Motion Specification and set Motion to [morphing motion]


    The Mesh Morpher node is added to Solvers, and Morpher Specification nodes are added to the boundaries under the selected region(s).
  4. Select Solvers > Mesh Morpher > [morpher method] and consider whether to modify any of the following properties:
    • Set Verbosity to None, Low or High
    • Initialization Needs Morphing
    • Solver Frozen
    • Morph At Inner Iterations
    • Morph From Zero
    • Ignore Gridflux Terms
    • Recompute Interfaces
    • Morpher Tolerance
    • For the RBF morpher, choose whether to activate the Skip Thinned Vertex Corrector option.