GPA threshold? There’s generally no such thing for graduate schools in engineering. It’s extremely subjective, so “chancing” you is nigh on impossible.
I will say that I got into some of the schools on your list and was rejected by some of the schools on your list with a similar background and research interest to you and a 3.4-ish overall GPA. It certainly didn’t hold me back. I ended up at a top 10 aerospace PhD program, then a national lab, and now I’m a faculty member at a research institution running my own aerodynamics program. So, don’t let your 3.49 get you down. You’re solid.
I’ll also note that you should take a look at the specific departments in question. If your interested is the aerospace side of fluids, then a place like Berkeley is perhaps not a good choice anyway because they don’t really do a lot in that field. Your targeted list should reflect your research interests.