What if there are three pipes in parallel? Equation 2 doesn't quite work out. Is it possible to assume a Re for the first AND second branches of parallel pipes?
My first thought is that there are 2 ways to approach this. First is what you suggested, to start off with 2 guesses instead of just 1. I guessed velocities, but yes you can also start off by guessing Re instead that would work too, and each iteration you update your 2 guesses. Other method with will often work but depends on exactly how the pipes are connected and what you know and where you know it, is to treat the 3 pipes first as just 2 pipes in parallel with each other, and then separately, treat that combination of 2 parallel pipes as 1 combined inlet/outlet ... and have this combined inlet/outlet in parallel with the 3rd pipe. Which of the two methods is better would depend on the exact construction.
What if there are three pipes in parallel? Equation 2 doesn't quite work out. Is it possible to assume a Re for the first AND second branches of parallel pipes?
My first thought is that there are 2 ways to approach this. First is what you suggested, to start off with 2 guesses instead of just 1. I guessed velocities, but yes you can also start off by guessing Re instead that would work too, and each iteration you update your 2 guesses. Other method with will often work but depends on exactly how the pipes are connected and what you know and where you know it, is to treat the 3 pipes first as just 2 pipes in parallel with each other, and then separately, treat that combination of 2 parallel pipes as 1 combined inlet/outlet ... and have this combined inlet/outlet in parallel with the 3rd pipe. Which of the two methods is better would depend on the exact construction.
@@BrianBernardEngineering Gotcha, thanks so much for the quick reply too