Time integration in comsol 3.5a

Hi everyone,

I am just wondering if there is a time integration function in comsol 3.5a. I am calculating fluid flow rate through a boundary and which is a function of time and I would like to integrate the flow rate with respect to time to get cumulative production. I am aware comsol 4 has the timeint function which I believe is what I am after but in comsol 3.5a instead. Does anybody have any idea?

Cheers,

Andres Bracho.