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. Make sure that the minimum volume is a positive number.

2.   Examine the mesh (Figure  22.2).

Figure 22.2: Mesh Display

3.   Select Axisymmetric Swirl from the 2D Space list.

General

  The geometry comprises an axisymmetric bowl. Furthermore, swirling flows are considered in this problem, so the selection of Axisymmetric Swirl best defines this geometry.

Also, note that the rotation axis is the x-axis. Hence, the x-direction is the axial direction and the y-direction is the radial direction. When modeling axisymmetric swirl, the swirl direction is the tangential direction.

4.   Add the effect of gravity on the model.

General Gravity

(a)   Enable Gravity.

(b)   Enter -9.81 ${\rm m/s}^2$ for X in the Gravitational Acceleration group box.