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Define > Boundary Conditions

Set the boundary type comdition for the pressure_farfield surface (aka zone) to the pressure-far-field boundary type by clicking on the latter. Select Yes to the pop-up window asking if it's "OK to change pressure_farfield's type from wall to pressure-far-field?".

 
Then click Set .... Set the Gauge Pressure to 101325. Set the Mach Number to 3. Under X-Component of Flow Direction, put a value of 1 (i.e. the farfield flow isin the X direction).

Next, click on the Thermal Tab. Change the temperature to 300K. We are assuming ambient temperature.

(click picture for larger image)

Click OK. The pressure-far-field boundary type effectively imposes that there is no upstream propagation of disturbances if the flow at the boundary is supersonic. See section 7.9 of the FLUENT help for more details about this boundary type.

Similarly, change the boundary condition for the symmetry surface to the symmetry boundary type. No user input is required for the  symmetry boundary type. At any boundary set to the symmetry type, FLUENT internally sets the

• normal velocity = 0
  
• normal gradients of all variables = 0

See section 7.14 of the FLUENT help for more details.

The boundary type for the wedge surface is set to wall by default. There is no need to change that. boundary type and symmetry to symmetry type.

Set wedge to wall boundary type and symmetry to symmetry type.

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