[diwakaranant]

Hi,

I intend to run shape optimization study for a flying wing configuration
for which I need to define 2 FFD box definitions.

I have defined the FFD box parameters as

FFD_NBOX= 2
FFD_NLEVEL= 1
FFD_TAG= 0
FFD_LEVEL= 0
FFD_DEGREE_I= 5
FFD_DEGREE_J= 4
FFD_DEGREE_K= 1
FFD_PARENTS= 0
FFD_CHILDREN= 0
FFD_CORNER_POINTS= 8
-10.0      0.0    -30
160    -130    -30
440    -130    -30
520     0.0    -30
-10.0      0.0    70
160    -130    70
440    -130    70
520     0.0    70
FFD_CONTROL_POINTS= 0
FFD_SURFACE_POINTS= 0
FFD_TAG= 1
FFD_LEVEL= 0
FFD_DEGREE_I= 5
FFD_DEGREE_J= 4
FFD_DEGREE_K= 1
FFD_PARENTS= 0
FFD_CHILDREN= 0
FFD_CORNER_POINTS= 8
160    -130    -30
480    -370    -30
580     -300    -30
440    -130    -30
160    -130    70
480    -370    70
580     -300    70
440    -130    70
FFD_CONTROL_POINTS= 0
FFD_SURFACE_POINTS= 0

I obtained the FFD box, as shown in the pics attached with the post.

I want to know the meaning of the FFD terms like FFD_NLEVEL,
FFD_LEVEL, FFD_PARENTS, FFD_CHILDREN etc. and what values
should to be taken for multiple FFD box definitions.

Also, for how to define the FFD parameters for the 2 FFD boxes
in the DEFINITION_DV option in the .cfg file ?

Thanks
Anant