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Now we will specify the boundary conditions governing the problem. In the Outline window, highlight Boundary Conditions.

Operating Conditions

FLUENT defines absolute pressure as P_absolute = P_gauge + P_operating pressure. The default operating pressure in FLUENT is 101325 Pa, which is 1 atm. We can equate the operating pressure to the absolute pressure by setting the gauge pressure equal to zero.

Centerline

Under Zone, highlight Centerline. Change the Type to axis. Confirm you are changing the selection, then leave the name as the default centerline.

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