- Jan 17, 2009
- Reaction score
Is there any good rules of thumb for tube fin length to diameter ratio's. I'm working on a design that would have tube fins several inches long and would be 3/4" to an 1" in Diameter. I could pull out my fluids book and find out all kinds of info but I don't know if it will help me figure out if they will help or just add drag. I'm ok with the drag. I don't know if RockSim's calculations break down for large length to diameter ratios, but it has so far given me the thumbs up.