Quote:
Originally Posted by Porthole
Length, diameter, fittings/appliances and elevation affect flow rates and required pressure to meet the flow required, not curves and coils.
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In closed channel flow, it takes energy to change the direction of the fluid. In close channel flow, there is always surface friction between the fluid and its container and the friction is greater when the fluid is forced to change direction. Basic ME311 (fluid mechanics) for mechanical engineers.