Step 6: Boundary Conditions

Boundary Conditions

1.   Set the boundary conditions for the inlet ( rotor-inlet).

Boundary Conditions rotor-inlet Edit...

(a)   Enter 1.0 atm for Gauge Total Pressure.

(b)   Enter 0.9 atm for Supersonic/Initial Gauge Pressure.

(c)   Click the Thermal tab and enter 288 K for Total Temperature.

(d)   Click OK to close the Pressure Inlet dialog box.

2.   Set the boundary conditions for the outlet ( stator-outlet).

Boundary Conditions stator-outlet Edit...

(a)   Enter 1.08 atm for Gauge Pressure.

(b)   Enable Radial Equilibrium Pressure Distribution.

(c)   Click the Thermal tab and enter 288 K for Backflow Total Temperature.

(d)   Click OK to close the Pressure Outlet dialog box.

Note:   The momentum settings and temperature you input at the pressure outlet will be used only if flow enters the domain through this boundary. It is important to set reasonable values for these downstream scalar values, in case flow reversal occurs at some point during the calculation.

3.   Retain the default boundary conditions for all wall zones.

Boundary Conditions rotor-blade-1 Edit...

Note:   For wall zones, ANSYS FLUENT always imposes zero velocity for the normal velocity component, which is required whether or not the fluid zone is moving. This condition is all that is required for an inviscid flow, as the tangential velocity is computed as part of the solution.