Rotating and Translating 2D Airfoil

jpesich · August 22, 2014, 12:41

Hello everyone,

So I am trying to solve an aeroelastic flutter problem. I use the torsional and bending mode shapes as inputs for rotation and translation, respectively. I want this to be a 2D simulation.

I am having problems with having two separate regions. One region as the airfoil where I specify the motion, and a stationary fluid region with inlet/outlet conditions.

When I try to convert my mesh to 2D it doesnt keep the fluid region and I am left with a lonely airfoil

I tried to do it 3D but then it doesn't recognize the airfoil as a wall and the solution to a straight flow through a box is computed...

How do you have two regions for 2D simulations?!
Thanks!

Shelley · August 22, 2014, 18:48

Did you create your mesh in Star ccm+? I am doing the similar work, and everything is fine.
I have two parts in 3D model, then create two regions from parts. Generate 3D mesh and convert to 2D. That's how I do it. Hope it is helpful.

jpesich · August 26, 2014, 13:52

How did you create the two separate parts? Did you extrude each or make them each a sheet body? Did you have to do a "subtract" to form the volume mesh?

Any info would be appreciated! Thanks Shelley!

Shelley · August 31, 2014, 18:15

You can create several parts from surfaces.
Right click the Geometry-> parts->surfaces ->create new part from surfaces

August 22, 2014, 12:41	Rotating and Translating 2D Airfoil	#1
jpesich New Member Justin Join Date: Aug 2014 Posts: 16 Rep Power: 12	Hello everyone, So I am trying to solve an aeroelastic flutter problem. I use the torsional and bending mode shapes as inputs for rotation and translation, respectively. I want this to be a 2D simulation. I am having problems with having two separate regions. One region as the airfoil where I specify the motion, and a stationary fluid region with inlet/outlet conditions. When I try to convert my mesh to 2D it doesnt keep the fluid region and I am left with a lonely airfoil I tried to do it 3D but then it doesn't recognize the airfoil as a wall and the solution to a straight flow through a box is computed... How do you have two regions for 2D simulations?! Thanks!

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August 22, 2014, 18:48		#2
Shelley New Member Tong Zhou Join Date: Nov 2011 Posts: 12 Rep Power: 15	Did you create your mesh in Star ccm+? I am doing the similar work, and everything is fine. I have two parts in 3D model, then create two regions from parts. Generate 3D mesh and convert to 2D. That's how I do it. Hope it is helpful.

August 26, 2014, 13:52		#3
jpesich New Member Justin Join Date: Aug 2014 Posts: 16 Rep Power: 12	How did you create the two separate parts? Did you extrude each or make them each a sheet body? Did you have to do a "subtract" to form the volume mesh? Any info would be appreciated! Thanks Shelley!

August 31, 2014, 18:15		#4
Shelley New Member Tong Zhou Join Date: Nov 2011 Posts: 12 Rep Power: 15	You can create several parts from surfaces. Right click the Geometry-> parts->surfaces ->create new part from surfaces