Hi @happy_gerrard,
can you just tell me of which simulation you are talking about?
Your bluff bodies remember me a bit of the so called Ahmed body. Is that what you are investigating at the moment?
You can have a look at a Project Spotlight I did a while ago: Ahmed Body
By importing the project you can see what has been done during the Pre-Processing & Post-Processing.
Feel free to add you questions/comments.
Cheers!