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FIGURE 14

Pressure at the outlet

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Locate and highlight "farfield2". Change its Type to "pressure-outlet".

A window will pop up. Leave "Gauge Pressure (pascal)" as default (zero). Apply the same turbulence conditions as describe above for Velocity at inlet boundary condition.

FIGURE 15

Note: is this window does not automatically pop up, click "Edit...", next to where you specified the Type of the boundary condition.

Wall

We need to tell FLUENT that the blades of the turbine are walls (i.e., no-slip condition, or no velocity normal or tangential to there), that are rotating together with the mesh around it.

To do that, select the "wall_blade_bot" zone. It should be already assigned to the Type "wall" (if not, do so). Click "Edit...".

Under "Wall Motion" change to "Moving Wall". On the new options that appeared, change the Motion to "Rotational". Now, specify the Rotation-Axis Origin with the same corresponding values as before. X=-0.02m, Y=-0.034641m. Click Ok.

FIGURE 16

Now, let's copy that to the other blades. Click "Copy", near to "Edit...". On the left list, select the boundary condition you just made,"wall_blade_bot". The two othe wall_blade boundary condition appeared on the right column. Go ahead, click on both (the two must be highlighted), then click "Copy".

FIGURE 17

Click Ok on the window that popped.

MAYBE it's to big? Video...? 

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