If you are unable to obtain a license for FLOW-3D, consider these professional-grade open-source or free alternatives:
: You can request a trial or demonstration directly from the developer, Flow Science Customer Support Flow-3d Download Full Crack WORK
: Offers a free academic license for students with a cell count limit (typically around 512,000 cells). Simcenter FloEFD (Student Edition) If you are unable to obtain a license