Langley Research Center Turbulence Modeling Resource

 

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2D NACA 0012 Airfoil Validation Case

Effect of Farfield Boundary
 

The plots show examples of the effect of farfield grid extent on lift and drag coefficients (using the 449 x 129 base grid) for high-lift conditions on the NACA 0012 airfoil at alpha=15 deg. A farfield extent of 500 c is far enough for the finite boundary to have only a minimal influence on the solution. With smaller farfield boundary extents such as 30 c, the boundary influence on the forces is greater (especially for drag) unless one employs a "farfield point vortex" (PV) boundary condition correction. See Thomas and Salas, AIAA Journal 24(7):1074-1080, 1986.
 
 

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Last Updated: 01/27/2014