1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Fluid Flow (Water Jets Combine)

  1. May 28, 2009 #1
    1. The problem statement, all variables and given/known data
    Two water jets collide and form one homogeneous jet as described below:

    Jet 1, with v=4 m/s, enters directly upwards through a pipe of diameter .10m into a connector pipe. Jet 2, with v= 6 m/s, enters from the left in a pipe of .12m diameter which is perpendicular to Jet 1. Both jets meet and continue down one pipe. Find the discharge of homogeneous fluid at the end of the pipe, and find the horizontal and vertical components of the fluid in the third pipe.

    2. Relevant equations

    The continuity euation...Q=A1V1=A2V2. And possibly the conservation of momentum equation:

    F= pQ2V2^2 - pQ1V1^2

    3. The attempt at a solution

    The first part is quite easy...A=pi*(d^2)/4...v*A=V (volumetric flow rate) add the two streams together to get the discharge out the third pipe.

    So A1*V1+A2*V2= pi*(.12^2)/4 * 6 m/s + pi*(.1^2)/4 * 4 m/s = 0.100 m^3/s

    Now, I have no idea where to begin. I don't have an angle for the third pipe which (in the diagram) veers at an angle theta from the joined 1st and 2nd pipes. I also have the answers as this is a practice exam for my exam tomorrow.

    Horizontal Component: 4.1 m/s
    Vertical Component: 1.3 m/s
    Theta: 17.6 degrees (not given)

    Thanks for all the help.
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted

Similar Discussions: Fluid Flow (Water Jets Combine)
  1. Jet of water (Replies: 6)

  2. Water stream diameter (Replies: 1)