Setting Boundary Conditions and Values

A wall boundary representing the surface of the airfoil.

A free-stream boundary at the external edge of the solution domain.

Open the Regions node, then right-click the Default_Fluid 2 node and select Rename....

Enter the name Fluid and click OK.

Select the Fluid > Boundaries > freestream > Physics Conditions > Flow Direction Specification node.

In the Properties window, change the Method property to Components.

Select the Physics Values > Flow Direction node.

As for the initial velocity, change the Coordinate System property to Cartesian 1.

Select the Mach Number > Constant node.

Change the Value property to 0.725.

Select the Static Temperature > Constant node.

Change the Value property to 291 K.

All other conditions for the free-stream boundary and the default wall boundary conditions are suitable for this problem.