Hi folks.I'm 3rd grade mechanical engineering student.I want to make cpu cooler.I will make pid controlled fan with an arduino. PID path is easy but I could not find anything about fan dynamics. I want to design my own fan.I need something like "fundamentals of fans" that should answer my questions like; Which material should I use? How many blades should I make? How thin should it be? How much degree of blades should I choose? How many fins should I use? etc. It's not my school project or homework,I just want to make it.In summer I have a lot of time.