Specify a Local Mesh

The Local Mesh dialog allows you to specify an initial mesh in a local region of the computational domain to better resolve the model specific geometry and/or flow (and/or heat transfer in solids) peculiarities in this region.

Procedure

  1. Open the Local Mesh  dialog:

    • On the ribbon, click Tools > Flow Simulation > Mesh > Local Mesh.

    • On the toolbars, click Local Mesh on the Flow Simulation Features toolbar.

    • In the menu, select Tools > Flow Simulation > Insert > Local Mesh.

    • In the Flow Simulation Analysis tree, right-click the Mesh item and select Insert Local Mesh.

  2. Under Selection select the desired selection mode:

    • Reference . Allows to select a component(s), face(s), edge(s) or vertex(s) presenting the local region in which the initial mesh will be constructed. Select the desired component(s), face(s), edge(s) or vertex(s) in the graphics area. The selected objects appear in the Components, Faces, Edges, Vertices to Apply Local Mesh Settings  list.

      The selected component can be a part, a subassembly, or body in a multibody part.

      Local mesh settings are applied to all cells intersected by the component. In case it is hard to select the component in the graphics area, you can select it from the flyout FeatureManager design tree. To specify a local mesh in a fluid region, you need to specify this region as a component and disable this component by selecting the Disable solid components option.

      If you select face(s), edge(s) or vertex(s), local mesh settings are applied to all cells intersected by the selected face, edge, or a cell enclosing the selected vertex.

    • Region . Allows to define the local region as one of the following simple geometric shapes:

      • Point. To specify a point that defines a local region, specify the distances from the Global Coordinate System origin to the point.

      • Cuboid. To define a 3D box that bounds a local region, specify the distances from the Global Coordinate System origin to the region box sides.

      • Cylinder. To define a cylinder that bounds a local region, specify its radius and the coordinates of the cylinder bases centers in the Global Coordinate System.

      • Sphere. To define a sphere that bounds a local region, specify its radius and the center coordinates in the Global Coordinate System.

      You can also manually shift the region sizes in the graphics area. Click and drag the arrow handles at the sides of the region frame to the desired positions. When you finish dragging, a callout appears allowing you to adjust the exact size or position of the region boundary by typing or correcting its value or coordinate.

      Tip

      In case of Cuboid, to adjust both boundaries along the same axis symmetrically and simultaneously, hold Shift while you drag the arrow handle.

      The Appearance option is available by the right-click on the region in the graphics area and allows to specify the appearance of the geometric shape (see “Region Appearance (Local Mesh)” for details).

  3. Specify the refinement settings for one or more of the following set of mesh parameters:

    • Under Refining Cells, you can specify settings to refine the cells of a specific type. You can specify either the refining of fluid cells, and/or solid cells, and/or Solid-Fluid Boundary Cells in this region (see “Refine Cells by Type” for details).

    • Under Channels, you can define “narrow channels” and specify the parameters governing the initial mesh in the channels within the local region (see “Channels Resolution” for details).

    • Under Advanced Refinement, you can specify mesh settings for resolving the substance interface within the region. To specify the advanced refinement settings, select the Advanced refinement check box and then specify the required parameters (see “Resolve the Interface Between Substances” for details).

    • Under Equidistant Refinement (available for the Reference selection mode only), you can specify settings to refine the cells within the region bounded by surfaces that are equidistant from the selected objects. To specify the equidistant refinement settings, select the Equidistant Refinement check box and then specify the required parameters (see “Equidistant Refinement” for details).

  4. Under Close Thin Slots you can specify the size of the model’s flow passages that you want to fill with a solid material.

    Maximum Height of Slots to Close . Allows you to specify the Maximum Height of Slots to Close value to fill the slots which height is less than the specified value with the Solid closest to the slot.

  5. Under Display Refinement Level you can display the mesh corresponding to the specified refinement settings (see “Display Refinement Level” for details).
    Note:

    Note, that the specified refinement settings do not influence the constructed mesh. These settings allows to visualize the refined mesh only.

  6. Click OK  to apply changes and close the dialog.

    -or-

    Click Keep Visible  before clicking OK  to keep the dialog open and continue adjusting local mesh settings.

Parent Topic: Local Mesh