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Start > All Programs > ANSYS 12.0 > Fluid Dynamics > FLUENT 6.3.26

Select 2D under the Dimension list and Double Precision under the Options list, and click Run.

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Round-off errors occur when pressure changes Δp in the flow are much smaller than the pressure values Δp._ One then gets small differences of large numbers. For our supersonic flow, we'll get significant variation in the absolute pressure so that pressure changes _Δp are comparable to pressure levels p. So we can work in terms of absolute pressure without being hassled by pesky round-off errors. To have FLUENT work in terms of the absolute pressure, set the Operating Pressure to 0.

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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

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

Go to Step 5: Solution!

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