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-   -   Q: Airfoil Low Reynolds (http://www.cfd-online.com/Forums/fluent/107831-q-airfoil-low-reynolds.html)

mashiro October 7, 2012 13:05

Q: Airfoil Low Reynolds
 
I am design wind turbine 1KW. So I need to simulate predict airfoil in low reynolds. I used NACA 0012 for test. I want to know:
1/ In low reynolds you will use unsteady or steady for time.
2/ Why did my coefficient drag decrease follow time when I use k-epsilon in condition unsteady? I think it will oscillate at a point.

syavash October 7, 2012 16:40

Quote:

Originally Posted by mashiro (Post 385355)
I am design wind turbine 1KW. So I need to simulate predict airfoil in low reynolds. I used NACA 0012 for test. I want to know:
1/ In low reynolds you will use unsteady or steady for time.
2/ Why did my coefficient drag decrease follow time when I use k-epsilon in condition unsteady? I think it will oscillate at a point.


1- You should use steady scheme to analyze your problem.
2-Oscillation during solution convergence is a common thing for aerodynamic coefficients.

Bests.

stuart23 October 8, 2012 07:51

How low is your Re...? You might be better to use a Low Re k-e model.


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