Maximum flow rate of water in a pipe of a certain diameter
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Normally, we calculate the flow rate based on the specified flow velocity for water. But for pipes of known dimensions, is there a limit to the flow velocity? For example, in a DN50 pipe, what is the maximum flow velocity allowed? Thus, it is also possible to know what the maximum water volume is?
Required: pressure difference, inner pipe wall roughness parameter, and pipeline length to determine the flow velocity. The key is the pressure difference.
It can be assumed that the pipe length is 100 meters, it is a new carbon steel pipe, and the pressure difference is 0.15 MPa. But I think no matter how large the pressure drop is, the flow velocity inside the pipe can’t be infinitely high; there must be a limit, meaning there is also a limit to the flow rate.
It can’t be infinitely large; it depends on the characteristics of the pump.
The flow velocity at which the resistance equals the driving force is the limiting flow velocity
The exit water flow velocity of a high-pressure water cutter should be very high! The maximum flow velocity inside the pipe is definitely much higher than the velocity specified in our design!