Changing airfoil angles and re testing

Blake.Foley · August 26, 2022, 00:24

Hi all,

motorsport Engineering student here and new to CFD. Getting my grips around Star CCM this week, and I am confident in setting up and completing a run but have run into a question that I was hoping I can resolve here while my instructor is on leave.

I am Testing a 6412 NACA airfoil @ 0 Degrees angle of attack, I am looking to see if it is possible to change the AOA without having to set up an entirely new simulation. ideally, I would like to test the 6412 at 0, 10, 15, and 20 degrees within the same simulation and compare them together(this is a 3D airfoil).

some steps that I have tried are-

-Transform and rotate the part. (if I do this on the part itself, it will rotate but not re-mesh. If done on the subtract with the tunnel, it rotates the entire assembly.)

-Create a rotate operation with the same results from above.

Any guidance is appreciated!

LuckyTran · August 26, 2022, 05:18

The workflow is a pipeline. You need to generate the parts and define (automatic) operations that rotates the airfoil. Then create automated mesh operations to mesh the resulting bodies. That way, when you rotate the part by everything else follows. You click mesh. All your settings are still there. And then you hit run,.

For example create a part body for the body and a separate one for the body. Then do a boolean subtract and remove the airfoil cutout from the box. Then mesh the resulting subtracted body.

August 26, 2022, 00:24	Changing airfoil angles and re testing	#1
Blake.Foley New Member Blake Foley Join Date: Aug 2022 Posts: 2 Rep Power: 0	Hi all, motorsport Engineering student here and new to CFD. Getting my grips around Star CCM this week, and I am confident in setting up and completing a run but have run into a question that I was hoping I can resolve here while my instructor is on leave. I am Testing a 6412 NACA airfoil @ 0 Degrees angle of attack, I am looking to see if it is possible to change the AOA without having to set up an entirely new simulation. ideally, I would like to test the 6412 at 0, 10, 15, and 20 degrees within the same simulation and compare them together(this is a 3D airfoil). some steps that I have tried are- -Transform and rotate the part. (if I do this on the part itself, it will rotate but not re-mesh. If done on the subtract with the tunnel, it rotates the entire assembly.) -Create a rotate operation with the same results from above. Any guidance is appreciated!

August 26, 2022, 05:18		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,676 Rep Power: 66	The workflow is a pipeline. You need to generate the parts and define (automatic) operations that rotates the airfoil. Then create automated mesh operations to mesh the resulting bodies. That way, when you rotate the part by everything else follows. You click mesh. All your settings are still there. And then you hit run,. For example create a part body for the body and a separate one for the body. Then do a boolean subtract and remove the airfoil cutout from the box. Then mesh the resulting subtracted body.