how to calculate circulation in ansys fluent 13.0

ijlal · November 10, 2012, 05:34

i am performing numeruical experiment on subsonic airfoil in ansys fluent 13.0. i want to calculate circulation around the airfoil on the defined shape of rectangle. is there any way of calculating circulation??????? help me...i am new to cfd

LuckyTran · November 14, 2012, 11:34

Integrate vorticity over the entire domain or just the rectangle (volume integral), that gives you circulation.

If you need to: use definition of circulation and apply Stoke's theorem to convince yourself that it gives the same result.

ijlal · November 15, 2012, 04:53

no..it would not give the circulation. i need user defined codes that would calculate simultaneously along with drag and lift history ...stokes theorem cannot be applied to the area inside of which there is airfoil...

LuckyTran · November 15, 2012, 11:19

Stoke's theorem should work even around airfoils?

ijlal · November 17, 2012, 04:43

we want circulation on a rectangle around airfoil. and stokes theorem is applied for deformable boundary.since the rectangle contains airfoil and hence it is not applied here....can you suggest me some other way....have you ever calculated it before???????

November 10, 2012, 05:34	how to calculate circulation in ansys fluent 13.0	#1
ijlal New Member ijlal Join Date: Nov 2012 Posts: 3 Rep Power: 14	i am performing numeruical experiment on subsonic airfoil in ansys fluent 13.0. i want to calculate circulation around the airfoil on the defined shape of rectangle. is there any way of calculating circulation??????? help me...i am new to cfd

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November 14, 2012, 11:34		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,799 Rep Power: 67	Integrate vorticity over the entire domain or just the rectangle (volume integral), that gives you circulation. If you need to: use definition of circulation and apply Stoke's theorem to convince yourself that it gives the same result.

November 15, 2012, 04:53		#3
ijlal New Member ijlal Join Date: Nov 2012 Posts: 3 Rep Power: 14	no..it would not give the circulation. i need user defined codes that would calculate simultaneously along with drag and lift history ...stokes theorem cannot be applied to the area inside of which there is airfoil...

November 15, 2012, 11:19		#4
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,799 Rep Power: 67	Stoke's theorem should work even around airfoils?

November 17, 2012, 04:43		#5
ijlal New Member ijlal Join Date: Nov 2012 Posts: 3 Rep Power: 14	we want circulation on a rectangle around airfoil. and stokes theorem is applied for deformable boundary.since the rectangle contains airfoil and hence it is not applied here....can you suggest me some other way....have you ever calculated it before???????