problem while looping over cells in LES

Jimmy

ok, here's my problem.

i'm tryin to compute new variables over the entire domain at each time step in an LES simulation. I created an UDF with DEFINE_ADJUST that checks for time steps before applying operations. The idea is to compute mean value of some variables by updating a sum at each time step, i.e.:

Vmean = (sumV(t-1)+ V(t))/N

where N is number of time steps. Problems arise while looping on cells begin_c_loop. instead of updating the sum on each cell it takes all previous cells in the loop and add the values, creating a divergent sum.

does anyone has an idea how to compute a basic operation on EACH cell in an independant way ?

thx for help