Need Help-Residence time contours

Garth Truesdale

I am a fluent newbie and I need some help to accomplish something I am trying to do in Fluent. I am not sure if their is an easy way to do this. I want to plot contours of residence time. I am using fluent on a school design project. I am modeling airflow patterns inside of an enclosed geometry (3-D) with multiple velocity inlets and pressure outlets. The only species I have is air. A good metric to compare the different models I have ran would be to determine which models evacuate air from the geometry the fastest, and where my stale or old air is collecting, to aid in redesign of my vent placement.

I am pretty sure that this will involve solving a transient solution and writing some type of code to insert into Fluent as a user defined function. I have no experience with this so if anyone could lend some advice or knew of a good tutorial I would be very grateful. Thanks, Garth Truesdale