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!

Mass flow rate

  1. May 9, 2013 #1
    1. The problem statement, all variables and given/known data

    Work out the mass flow rate of Nitrogen travelling through a at 0.3m^3/s if the pressure is 1 bar and the temperature is 18°C and the ideal gas constant is 8314 J/Kg K

    2. Relevant equations

    m=ρ*V*A

    m = mass flow rate
    ρ= density
    V = velocity
    A = flow area

    PV = nRT

    where
    P = pressure
    V = volume
    n = number of moles of gas
    R = gas constant
    T = absolute temperature


    3. The attempt at a solution

    I'm going round and round in a circle with it, the formula is simple enough and I know how to re-arrange it to get density but I need to work out the volume which is:

    V = nRT/P

    in order to do this I need to find the number of moles which is:

    mass of the gas/ molecular mass

    how do I work out the mass of the gas?

    and how do I work out the flow area when there isn't one provided?

    Thanks
     
  2. jcsd
  3. May 9, 2013 #2

    rock.freak667

    User Avatar
    Homework Helper

    You are given the volumetric flow rate in m^3/s which is given by:

    Volumetric flow rate = velocity * flow area.

    Using this, you will not need the area
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Mass flow rate
  1. Mass flow rate (Replies: 5)

  2. Mass flow rate (Replies: 2)

  3. Mass flow rate (Replies: 2)

  4. Mass flow rate (Replies: 2)

Loading...