residence time distribution in laminar flow comsol 4.2

Hi there, I am new in using Comsol and I am trying to obtain residence time distribution by Comsol, I used fluid flow-single phase flow-laminar flow from Comsol model wizard to model flow between two concentric tubes. Now I need to obtain the residence time distribution for this flow. I found a tutorial with name of "residence time in turbulent reactor ". It used Comsol 3.5a and Chemical Engineering Module>Mass Transport>Convection and Diffusion>Transient analysis, but this module is not available in Comsol 4.2. Can anybody give me a tutorial related to Comsol 4.2 or give me some advice?
Regards