3 ms·
Yes, it's the pressure differential that matters, but I don't think it helps in practice. Each pipe needs to have a ratio of inner to outer diameter of at least
by semi-extrinsic 7y ago
Yes, it's the pressure differential that matters, but I don't think it helps in practice. Each pipe needs to have a ratio of inner to outer diameter of at least 100. If the innermost radius is 1 mm, at three layers the outside radius of the biggest pipe is 1 kilometer.