(Chemical Engineering: Fluids storage and transport) Open-channel flow is a liquid flow in a channel, which has a free liquid surface.
⇒ With open-channel flow, the driving force is gravity because there is no net pressure force as the free
surface is evenly exposed to the atmosphere. ⇒ A less well known effect occurs in open-channel flow of a viscoelastic liquid, when the normal stress differences make the free surface
bow upwards in the center. ⇒ Open-channel flow is a liquid flow in a channel, which has a free liquid surface.
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