What happens if a section of a pipe that relies on gravity flow is reduced in diameter?
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On an 8-meter vertical pipe, if there is a reduction in diameter followed by a return to the original diameter, what differences will there be compared to before the diameter reduction?
When your inner diameter shrinks to 0, the medium stops flowing; other situations fall between this condition and no diameter reduction.
It’s simple: go home, get a plastic tube, connect it to water, and just squeeze the middle of the tube with your finger to find out. ;P
Well, that’s it for now; you can now check out examples 1–22 from the Tianjin University version of Chemical Engineering Principles! No further discussion will be conducted!
The pipe resistance will increase slightly, and the flow velocity in the neck section increases. The gravity flow sewage discharge pipeline is designed with a neck to meet the requirements for installing flow meters.
Natural flow requires a sufficiently large pipe diameter; if it is too small, air blockage is likely to occur