Time domain analysis of Unsteady Flow

Nikunj Raghuvanshi

Hi guys, I am doing an unsteady turbulent LES simulation in Fluent for the interior of a Flute. I autosaved the data for each timestep and want to analyze the vorticity at the cell centers as a function of time.

Question 1: All of fluent's post-processing tools seem to be geared towards analyzing the flow data at a given time, not analyzing the data in time domain. Is there any easy way in Fluent to do any kind of time-domain analysis for unsteady simulations?

Question 2: How do I get fluent to store the vorticity at the cell centers in the data file along with the rest of the stuff. Is there any way at all to control what all fluent stores in its data file? What all does it store in the data file by default? The Fluent manual only says it stores the "flow variables" in the data file, which is pretty vague.

The only solution that I can think of rite now is to somehow get Fluent to store the vorticity at the cell centers in the data files, then write my own code to parse these data files, collect the vorticity information at the cell centers at different time steps and then do the analysis in my code. Of course, this is tedious and Fluent is very much capable of doing it for me.

Is there any easier way? _Absolutely_ any suggestions are welcome. Sorry for the long mail.

thanks a ton, -Nikunj. --