You have hit the button @ right time... !!!
Since last month BETA TESTING is going-on and all active subscription customers are being provided privilege to TEST BETA and report bugs. (To Win competition, on max bugs reported-an added advantage).
You can download BETA 2016 from following link,
Whats new 2016 is available once you download BETA.
Here, I have attached What's New for Simulation & Flow Simulation.
Feel free to get-in touch for more info.
If you are after Flow Sim functionality in 2016 I would hold off for a bit. Flow Simulation Development have a slightly later release cycle, so the functionality is not a available to a bit later.
Last year the functionality was included in the pre-release version of the software, but if you sign up for the Beta forums you will be able to keep an eye on the release notes to see when it is available!