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Homework Help: Fluid hydraulics question

  1. May 3, 2008 #1
    1. The problem statement, all variables and given/known data
    Hi im trying to solve this problem.I think i have the first part sorted but the second part of the question is throwing me.
    Given the network of pipes shown below determine the flowrate through each pipe. Use the hazen williams formula with Ch = 100.
    I think I have this part done correctly.
    If the static pressure head at the entry point A to the network is 35m find the static pressure at the two exit points D and F, assuming the network is horizontal?

    2. Relevant equations

    Hazen williams formula: hf = 12.25*10^9 L Q^1.85/((Ch^1.85)*(D^4.87))
    Energy Eqn z1 + P1/rho*g = z2 + P2/rho*g

    3. The attempt at a solution
    I presume you use the energy equation for the second part and since the network is horizontal then the elevation heads will always cancel.Does it matter which way i go around the circuit to get to these two exit points.Do i just have to subtract the head loss due to frction from the given head to calculate the new static head.Also is this head loss accumulative because the pipes are in series?or am I way off the mark?any tips would be grately appreciated
    Thanks Debs:cool:
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

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