Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Definition of friction coefficients in a t-pipe

  1. Aug 15, 2012 #1

    I've got a question concerning a t-pipe configuration and the corresponding friction coefficient values because there are two different friction coefficients stated in literature. Let's assume we have a simple t-pipe where the main passage is larger than the side branch. The friction coefficient for the side branch is defined as [itex]\frac{\Delta p_{sb}}{\frac{1}{2} \rho v_{c}^{2}}[/itex] where [itex] v_{c} [/itex] is the initial velocity of the main passage flow. The friciton coefficient for the straight passage is then defined as [itex]\frac{\Delta p_{st}}{\frac{1}{2} \rho v_{c}^{2}}[/itex] .

    This would be all hunky-dory except that I have no idea how the two pressure differences [itex] \Delta p_{sb} [/itex] (sb stands for side branch) and [itex] \Delta p_{st} [/itex] are defined. Is the former, for instance, just the difference between the initial pressure in the side branch and the final pressure in the merged stream? Could anyone offer any insight on this?


    Attached Files:

    Last edited: Aug 15, 2012
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

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