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NACA 0012 Different Angles of Attack

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Old   January 28, 2010, 00:54
Question NACA 0012 Different Angles of Attack
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Arvind
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Hi All,

I want to perform flow simulations over NACA 0012 at different angles of attack. The method i followed is as below

X component of velocity, u = V cos(alpha)
Y component of velocity, v = V sin(alpha)

where alpha is the desired Angle of Attack.
I gave this conditions of velocities in the Inlet boundary condition which i have modelled as the left vertical plane .

Is this method correct??????
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Old   January 28, 2010, 08:43
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Send a picture about your domain with the boundaries marked. What are the other boundary conditions "above" and "under" the airfoil?
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Old   January 28, 2010, 09:45
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Hi Attila,

Here is the picture of my domain

I have given the velocity condition for inlet and pressure for both outlet and opening.

Inlet:

u = V cos(alpha)
v = V sin(alpha)
w = 0

Outlet & opening:

Static pressure: sea level
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Old   January 28, 2010, 09:48
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Attesz is an unknown quantity at this point
I can't find the picture...
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Old   January 28, 2010, 09:52
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Hey am very sorry it didnt attach it says it exceeds de memory.....am jus searching hw to reduce its size.......please don mind
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Old   January 28, 2010, 10:06
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I hav attached a word file which contains de domain pis.....
Attached Files
File Type: doc Doc1.doc (31.0 KB, 90 views)
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Old   January 28, 2010, 12:50
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Attesz is an unknown quantity at this point
your settings are not so correct, you have better to use boundary conditions like in attached img.set the round inlet with velocity components, and the outlet to opening with static pressure, or set your inlet and opening boundaries to one opening with velocity, so you don't have to modify the geometry.





good luck

Attesz

Last edited by Attesz; January 28, 2010 at 14:34.
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Old   January 29, 2010, 00:55
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Hi Attila,

Thnx a lot for ur help. I have never tried a boundary like u hav shown. I wil work on that and let u know if i find any difficulties.
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Old   January 6, 2013, 17:27
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Quote:
Originally Posted by Attesz View Post
your settings are not so correct, you have better to use boundary conditions like in attached img.set the round inlet with velocity components, and the outlet to opening with static pressure, or set your inlet and opening boundaries to one opening with velocity, so you don't have to modify the geometry.





good luck

Attesz
Hi Attesz; can you upload the picture if you have it still, please?
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Old   March 18, 2014, 02:14
Default Naca 0012 airfoil domine size in 3-D
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Nagari.Veeraprasad
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I am doing project on naca 0012 airfoil. I am completing my model in 3-D but i have doubt is how to take domine sizes. please suggest me.
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Old   March 18, 2014, 17:43
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You should do a sensitivity analysis to find out how close your boundaries should be. Is this what you are asking?
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