Suction simulation

  • Last Post 09 January 2020
akin3rd posted this 26 March 2019

I would like to simulate the suction on an airfoil using fluent 

the airfoil diagram is shown below, there is a suction slot which the sucked air flows through that leads to the low-pressure cavity which causes the suction.

The idea is to induce high energy turbulent mixing in the boundary layer flow and delay/prevent flow separation, thereby preventing stall

How do I simulate this environment in ANSYS Fluent.


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peteroznewman posted this 09 January 2020

I'm not a CFD expert, but I would assign the vertical edge inside the low pressure cavity to be a Pressure Outlet. Assign a negative gauge pressure to that outlet.  That creates the suction.

There would be a large air domain around the airfoil with an inlet velocity boundary condition on the left side, and a pressure outlet boundary condition on the right side that would have a zero gauge pressure.

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kkanade posted this 27 March 2019

please check this

though its old, it will help you get through process.


akin3rd posted this 05 April 2019


I don't see any tutorials on how to create suction.

I just need to know how to create a low-pressure environment in the suction cavity i.e. how do I specify boundary conditions that create a low-pressure environment?


Harak posted this 09 January 2020

Did you found an answer to this question? I have the same problem. 

akin3rd posted this 09 January 2020

I changed the geometry entirely, what I did was to make a section of the airfoil wall a velocity inlet BC or a pressure outlet BC