Is the pressure drop in pipes flowing upward and downward the same?
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Is the pressure drop in pipes flowing upward and downward the same? For straight pipe sections with the same diameter, length, and internal surface roughness, using the same fluid, one with flow in an upward direction and the other with flow in a downward direction – are their resistance losses the same? Is there a difference between gases and liquids?
The same; it’s just that during the upward movement, some of the kinetic energy is converted into potential energy
If the flow rate is the same, the resistance inside the pipe is the same; only the vertical height, whether upward or downward, needs to be taken into account additionally.
As long as the flow rate is the same, the frictional loss in the pipe remains the same, regardless of whether it is flowing upward or downward