Well I did that. You can read more in manuals and forums than they give you.Ask whoever you are getting your software off (Altair/Ansys/CD-adapco etc).
They will have data on the different architectures.
You may want to have a canary test* in your request email to ensure you are not talking to a sales idiot that knows f**k all.
"We are looking at buying a new system for our CFD simulations, would <insert knowingly deficient/old configuration> this be the best for the job, or would you recommend something else instead?"
I know Ansys are, or at least were, part of AMD's development program, so should have good data on EPYC.
I still think they the overall CFD champion is the combination:
- 4,8GHz coffee lake desktop core
- 8 Cores
- 6CH DDR4-3600LL memory