Step 3: Specify Boundary Types in GAMBIT
We'll label the boundary AFE as farfield1, ABDE as farfield2 and the airfoil surface as airfoil. Recall that these will be the names that show up under boundary zones when the mesh is read into FLUENT.
We'll create groups of edges and then create boundary entities from these groups.
First, we will group AF and EF together.
Operation Toolpad > Geometry Command Button > Group Command Button > Create Group
Select Edges and enter farfield1 for Label, which is the name of the group. Select the edges AF and EF.
Note that GAMBIT adds the edge to the list as it is selected in the GUI.
In the transcript window, you will see the message "Created group: farfield1 group".
Similarly, create the other two farfield groups. You should have created a total of three groups:
Edges in Group
HI,IG,HJ,JG (name might vary)
Define Boundary Types
Now that we have grouped each of the edges into the desired groups, we can assign appropriate boundary types to these groups.
Operation Toolpad > Zones Command Button> Specify Boundary Types
Under Entity, select Groups.
Select any edge belonging to the airfoil surface and that will select the airfoil group. Next to Name:, enter airfoil. Leave the Type as WALL.
In the Transcript Window, you will see a message saying "Created Boundary entity: airfoil".
Similarly, create boundary entities corresponding to farfield1, farfield2 and farfield3 groups. Set Type to Velocity-Inlet for farfield1 and farfield2. Set Type to Pressure-Outlet for farfield3.
Save Your Work
Main Menu > File > Save
Main Menu > File > Export > Mesh...
Save the file as
Make sure that the Export 2d Mesh option is selected.
Check to make sure that the file is created.
Go to Step 4: Set Up Problem in FLUENT
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