[Capricorn]

I have a periodic domain 0.64*0.64 m with 512*512 grids. Inside this big domain there are small filter boxes of 0.02*0.02m, 0.04*0.04m,0.08*0.08m and 0.16*0.16 m. this is gas solid flow with euleruian model with solid vof 0.05. Now what i want is to move these small boxes in x and y direction within the whole big domain and gather the data inside thers boxes. The data i need is solid vof,solid velocity in y direction, gas velocity and slip velocity. Can any1 guide me how canm i write this kind of UDF in parallel ansys fluent.