Generating the Volume Mesh

The Viscous Flow solver relies on a finite element method. Provide it with a mesh that is composed of nodes and elements rather than cells and faces. In STAR-CCM+, a mesh that is composed of tetrahedral cells can support finite element solvers.

To create a tetrahedral mesh in the mixer:

  1. Right-click Geometry > Operations and select New > Mesh > Automated Mesh.
  2. Select the following:
    Pane Selection
    Parts window tube
    Select Meshers group box

    Surface Remesher

    Tetrahedral Mesher

  3. Click OK.
Elements at the core of the mesh can be larger than elements on the surface. To achieve this size, you set a base size of 0.05 m, and then apply smaller sizing on the wetted surfaces.
  1. Select Automated Mesh > Default Controls > Base Size and set Value to 0.05 m.
  2. Right-click Automated Mesh > Custom Controls and select New > Surface Control.
  3. Select Custom Controls > Surface Control and edit Part Surfaces. In the dialog, select the following:
    • Blade_A
    • Blade_B
    • Tube_wall

    Click OK.

  4. Expand Surface Control > Controls and set the following properties:
    Node Property Value
    Target Surface Size Target Surface Size Custom
    Minimum Surface Size Minimum Surface Size Custom
  5. Select Surface Control > Values and set the following properties
    Node Property Value
    Target Surface Size Percentage of Base 10.0
    Minimum Surface Size Percentage of Base 5.0
  6. Click Generate Volume Mesh .
  7. Click Show All Meshes to show the mesh in the Geometry scene.


Save the simulation.