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Velocity calculation

I have 2 pipes identical with the same diameter and c factor but different lengths

my question is when I compute the system I notice they have the same velocity!! 

I know it's the ideal case but in reality, friction affects velocity by reducing it soo any explanation?

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  • The pipes seem to be layed out in series (not parallel), since WaterGEMS is demand driven the demand at (or behind) junction J-1 will determine the flow in both pipes.This flow is equal for both pipes (assuming no demand on junction J6) since there is no storage in between (mass-balance). If the flow is equal for both pipes, and the diameter of both pipes is equal, the velocity will also be equal. If you would put the pipes in parallel (both pipe starting at T2 and ending at J1, you would see different flows and thus different velocities in each pipe. 

    Answer Verified By: mohamad joun 

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