💥💥💥 12 (Mostly) Free Alternatives to ANSYS Fluent (Because who wants to pay when you can be a frugal engineer?):

1. **OpenFOAM:** Buckle up, this one's open-source, powerful, and free, but be prepared to spend more time wrangling code than petting a CFD cat (they don't exist, but trust me, you'll want one after using OpenFOAM).

2. **FreeCAD with the "Sim CFD" module:** Imagine your favorite, free, parametric modeling software suddenly offering basic CFD. It's like finding a twenty in your old jeans, only better (because it involves simulating fluid flow, which is way cooler).

3. **SolveCFD:** This open-source gem boasts a user-friendly interface and decent capabilities, but be warned, it might require some patience and coffee to navigate the learning curve (but hey, free coffee is still coffee, right?).

4. **XFlow:** Feeling adventurous? Dive into the world of Python with this open-source library. You'll need some coding chops, but the learning experience is priceless (and free, remember?).

5. **SU2:** Open-source, hypersonic, and developed by NASA? This one screams "next-gen" (and it's free, because apparently NASA is cool like that).

6. **Elmer/Ice:** Don't let the icy name fool you, this Finnish open-source software is quite versatile, tackling everything from fluid flow to heat transfer (and it's free, because apparently Finns like sharing).

7. **Life gmsh:** Open-source meshing software that pairs well with other CFD codes. Think of it as the peanut butter to your CFD jelly (and it's free, because who doesn't love a good peanut butter sandwich?).

8. **Salome Platform:** Pre-processing your way to CFD glory? This open-source platform is your Swiss Army knife for mesh generation and other pre-processing tasks (and it's free, because apparently the Swiss are generous with their tools).

9. **ParaView:** Visualize your CFD results like a pro with this open-source gem. It's like dressing up your simulations in a fancy suit before presenting them to the world (and it's free, because looking good shouldn't cost a fortune).

10. **Any good textbook and a calculator:** Okay, this one might not be *software*, but the power of fundamental knowledge shouldn't be underestimated. Plus, who needs fancy computers when you have the raw power of your brain (and a calculator, because let's be honest, mental math is overrated)?

11. **Build your own CFD code from scratch:** Feeling like a programming rockstar? Channel your inner Tony Stark and build your own CFD code. Just remember, with great power comes great responsibility (and probably a lot of bugs to fix, but hey, the journey is the reward, right?).

12. **The power of imagination:** Close your eyes, picture the flow, and use your mind's eye to simulate. No software needed, just pure, unadulterated creativity (and maybe a whiteboard to sketch your ideas, because even imagination needs a little help sometimes).

**Remember, while these free options might not have all the bells and whistles of ANSYS Fluent, they can still be powerful tools in the right hands. So get creative, have fun, and who knows, you might just become the next CFD champion (without breaking the bank)!**