|MadSci Network: Engineering|
The form of your question is imprecise, so I don't really know what you are asking. Water will flow in either direction in an Archimedes Screw, provided the source of the water is touching the interior of the screw's chamber, and of course the screw is rotated in the correct direction. This requirement is similar to the priming that is necessary in any non-self priming water pump. Ordinarily water is lifted against gravity by the worm drive of the screw, where each pocket of water is separated from the source in a dynamic chamber created when the thread of screw rises upward pursuant to the rotation.
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