Recycling

question about fluid dynamics?

if i have a garden hose still half coiled up on a hose reel, and iam pumping water through it. does the pump work harder to push around the coil or not?
no- there isnt any kinks. i know the further the distance, the more torque i need. but i wondered whether the water going up hill through the coil would regain the spent energy on the downhill return.

So long as there are no kinks or other areas, where the hose is being deformed, then no. For water at high pressures, it doesn't really make any difference whether it travels horizontally, vertically, or in aloop, the pressure loss through the hose will stay the same. (unless you change the diameter of the hose or make it go around sharp bends.)

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