Boundary conditions
 

I want to simulate a case of supersonic flow over a forward facing step in a wind tunnel and in the open.
For the case of the wind tunnel these are the boundary condition I want to prescribe.
1. Inlet - Mass flow
2. Bottom(including step) - wall
3. Top - wall
4. outlet - pressure far field
The problem is I do not know which outlet boundary condition corresponds to the pressure far field condition. In fact I unable to figure out what exactly some of the boundary conditions do as I couldn't find much documentation related to it.

For the case of the step in the open, I intend to specify the following boundary conditions.
1. Inlet - Mass flow
2. Bottom(including step) - wall
3. Top - far field
4. outlet - far field

Are these conditions right? I am again uncertain as these worked in a commercial flow solver but doesn't work here.

So please answer at least this question that where can I look for pressure far field boundary condition.

You can use the farfield marker as shown below for farfield pressure boundary condition.

% Marker of the far field (0 = no marker)
MARKER_FAR= ( farfield )

and the marker below for an euler wall boundary condition
% Marker of the Euler boundary (0 = no marker)
MARKER_EULER= ( Wall )

Also the tutorial in the link below should help with the other boundary conditions

https://github.com/su2code/SU2/wiki/...p-in-a-Channel

where the name within the parenthesis is the name you give the boundary in the su2 mesh file. Hope this helps.

Thank You! :)