[Haowang]

Hi everyone,

I would like to optimize the twist distribution of a rectangular wing in SU2. The cross sectional shape must remain the same.

Does anyone know how I could do this using mesh deformation? FFD_TWIST seems suitable for this purpose, but I can't get that to work properly. Here is the definition of FFD_TWIST:
( 19, Scale | Mark. List | FFD_BoxTag, j_Ind, x_Orig, y_Orig, z_Orig, x_End, y_End, z_End )
Could anyone explain the meaing of the parameters listed above? Thank you in advance!

To be more clear, I give my definations for my FFD setting:

FFD_TOLERANCE= 1E-10
FFD_ITERATIONS= 500
FFD_DEFINITION= (WING,-0.0603, -0.03, -0.04836,0.785,-0.03, -0.04836,1.14,1.23, -0.04836,0.6851,1.23, -0.04836,-0.0603,-0.03, 0.04836,0.785,-0.03, 0.04836,1.14,1.23, 0.04836,0.6851,1.23, 0.04836)
FFD_DEGREE= (4, 3, 1)
FFD_CONTINUITY= NO_DERIVATIVE

DV_KIND= FFD_TWIST
DV_PARAM= ( WING, 1, 1,1,1, 1, 1, 1)
DV_VALUE= 3

DEFINITION_DV= (  19, 1.0 | UPPER_SIDE, LOWER_SIDE, TIP | WING, 1, 1,1,1, 1, 1, 1 )