Step 3: Move the Vertices

  1. Manually move the vertices of the inlets and outlet (ends of large pipe).

    Blocking > Move Vertex   > Move Vertex  

    Note:  If Auto Pick mode is enabled, selecting Move Vertex from the function tabs will prompt you to select from the screen. It is usually not necessary to select Move Vertex from the DEZ unless another option was previously selected.

    1. Click   (Select vert(s)) and move the vertices of the inlets and the outlet as shown in Figure 11: Moving Vertices of the Inlets and Outlet.

      Select the vertex and keeping the left-mouse button pressed, drag the vertex along the curve.

      Figure 11: Moving Vertices of the Inlets and Outlet

      Moving Vertices of the Inlets and Outlet

      Note:  Due to the associations made between the edges and curves, many of these vertices will “snap” to the correct position. Vertices may, however, be moved along the curve by dragging the mouse.

      To capture the ends of the curves:

      1. Select the vertex and drag it with the left mouse button depressed until the vertex can be moved no further.

      2. Position the cursor beyond the end of the curve to ensure that the end is captured.

      You may also prefer to associate the vertex with the points at the ends of the curves as described later.

      Note:  The ends of the pipe are straight and it is possible to block this example without using the curve associations. However, the curve associations also create line elements on the curves to which they are associated. If you skip performing the curve associations, the boundary line elements will not be created. This will make it impossible to apply boundary conditions to that edge (such as inlet or wall). Hence, most CFD solvers give errors if any of the perimeter edges are not associated with perimeter curves.

  2. Move the remaining vertices to their appropriate positions on the geometry.

    Try to make the blocks as orthogonal (good internal angles) as possible.

    Figure 12: Vertices Moved to Positions

    Vertices Moved to Positions

  3. Associate the vertices to the points.

    This is an optional step.

    1. Select Show Point Names.

       Geometry > Points > Show Point Names

    2. Make sure Point is selected for Entity in the Associate Vertex DEZ.

      Blocking > Associate   > Associate Vertex  

    3. Associate the following vertices and points:

      VertexPoint
      13POINTS/2
      21POINTS/5
      41POINTS/1
      42POINTS/10
      33POINTS/9
      37POINTS/8
      43POINTS/11
      44 POINTS/6

      Click the middle-mouse button to complete the operation.

    4. Deselect Show Point Names.

       Geometry > Points > Show Point Names

  4. Save the blocking file (2dpipe-geometry.blk).

    File > Blocking > Save Blocking As...

    The saved blocking file can be reloaded at a later time, using the File > Blocking > Open Blocking... menu item.