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Computing bulk flow velocity

  1. Dec 13, 2016 #1
    1. The problem statement, all variables and given/known data
    I'm running a simulation and was given 2 mass flow rates (let's say m1_dot and m2_dot) for 2 chemical species at the inlet.

    2. Relevant equations
    mass flow rate = density*velocity * area

    3. The attempt at a solution
    I need to compute the bulk velocity for the fluid (consisting of the 2 species), so it needs to be some mass-weighted average that I'm computing, but how can I do this when I don't know the mass fractions?
     
  2. jcsd
  3. Dec 13, 2016 #2
    Please explain why you think you don't know the mass fractions.
     
  4. Dec 13, 2016 #3
    Wait, can the mass fractions be determined from (m1_dot)/(m1_dot+m2_dot) and (m2_dot)/(m1_dot+m2_dot)?
    FOr some reason, I didn't think that would work.
     
  5. Dec 13, 2016 #4
    Sure.
     
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