about partial and full timestep
 

hallo i made tow files one with full timestep ( all variables) and the other with partial timestep ( velocity and pressure only) and i want to calculate the gradient of u,v,w : in the full time step it work . in the partial time step it doesnt work .

all this operations in post- proceessing please if any body have an idea to solve this problem send me in my emial foad012345@yahoo.com