Step 2: General Settings

General

1.   Check the mesh.

General Check

   ANSYS FLUENT will perform various checks on the mesh and will report the progress in the console. Ensure that the reported minimum volume is a positive number.

2.   Scale the mesh.

General Scale...

(a)   Select mm from the View Length Unit In drop-down list.

  All dimensions will now be shown in millimeters.

(b)   Select mm from the Mesh Was Created In drop-down list in the Scaling group box.

(c)   Click Scale to scale the mesh.

(d)   Close the Scale Mesh dialog box.

3.   Check the mesh.

General Check

Note:   It is a good idea to check the mesh after you manipulate it (i.e., scale, convert to polyhedra, merge, separate, fuse, add zones, or smooth and swap.) This will ensure that the quality of the mesh has not been compromised.

4.   Examine the mesh (Figure  15.3).

Figure 15.3: 2D BERL Combustor Mesh Display

  Due to the mesh resolution and the size of the domain, you may find it more useful to display just the outline, or to zoom in on various portions of the mesh display.

Extra:   You can use the mouse zoom button (middle button, by default) to zoom in to the display and the mouse probe button (right button, by default) to find out the boundary zone labels. The zone labels will be displayed in the console.

5.   Mirror the display about the symmetry plane.

Graphics and Animations Views...

(a)   Select axis-2 from the Mirror Planes selection list.

(b)   Click Apply and close the Views dialog box.

  The full geometry will be displayed, as shown in Figure  15.4

.

Figure 15.4: 2D BERL Combustor Mesh Display Including the Symmetry Plane

6.   Change the spatial definition to axisymmetric swirl.

General

(a)   Retain the default selection of Pressure-Based in the Type list.

  The non-premixed combustion model is available only with the pressure-based solver.

(b)   Select Axisymmetric Swirl in the 2D Space list.