Free Shape Domain
The Free Shape Domain feature () can be added from the model tree under Component using the Shape Optimization context menu. It sets up a smoothing equation for the domains in its selection, but it does not add any control variables, so unless a Free Shape Boundary or a Polynomial Boundary are added, the shape of the geometry will not change.
Boundaries will be considered fixed, if they are not part of a Free Shape Boundary, Polynomial Boundary, or Symmetry/Roller boundary. The interior boundaries of the Free Shape Domain feature are never fixed.
Variables
The Free Shape Domain feature adds
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Area and volume variables for imposing constraints (fsd#.area, fsd#.volume)
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Area in material relative to geometry frame, and similar for the volume in three dimensions (fsd#.relArea, fsd#.relVolume)
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Post-processing variable to assess how close the controls are to the bounds (fsd#.rel_disp)
Smoothing
For the mesh smoothing, choose smoothing type from the Mesh smoothing type list: Laplace, Winslow, Hyperelastic, or Yeoh (the default). For Yeoh, also enter a Stiffening factor C2 (default: 10). See Smoothing Methods in the COMSOL Multiphysics Reference Manual for more information.
Initial Deformation
Enter the initial deformation in the dx fields (default: 0 for all components).
Optimizing a Flywheel Profile: Application Library path Optimization_Module/Shape_Optimization/flywheel_profile
Shape Optimization of a Wrench: Application Library path Optimization_Module/Shape_Optimization/wrench_shape_optimization
Optimization of a Waveguide Iris Bandpass Filter — Polynomial Version: Application Library path Optimization_Module/Shape_Optimization/waveguide_filter_optimization_polynomial
Optimizing the Shape of a Horn: Application Library path Acoustics_Module/Optimization/horn_shape_optimization
Shape Optimization of a Tesla Microvalve: Application Library path Optimization_Module/Shape_Optimization/tesla_microvalve_shape_optimization