Mixing of gases with different densities

- January 31, 2019 at 7:54 am
  
  TINOGK
  Subscriber
  
  Can someone help me with mixing of normal air and methane in a pipe of 100m length 3m height and 5m width. The air flows through one of the opening of pipe but the methane enters at a point on the top which is 15m away from the opening of the pipe. the quantity of methane entering is 7m3/second. I want to study how the air flow will affect the methane mixing.
  
  I have gone through some of the tutorial videos but I couldn't find mixing of 2 gases and moreover no videos shows flow in terms of quantity I could find only in terms of velocity.
- January 31, 2019 at 8:14 am
  
  DrAmine
  Ansys Employee
  
  1/Define a mixture of air and methane: use species transport for this
  
  2/Then provide adequate boundary conditions on your inlet stream
- January 31, 2019 at 9:08 am
  
  TINOGK
  Subscriber
  
  Thank you sir.
  
  but in boundary conditions I couldn't find how to enter the quantity in terms is Cubic meter/ second. It shows only velocity m/s. Please help me as I am new to this software.
  
  Thank you
- January 31, 2019 at 9:19 am
  
  DrAmine
  Ansys Employee
  
  You can only provide mass flow /mass flux input or velocity input. You need then to use mass flow inlet and get the mass flow or velocity out of the volumetric flow rate: Basic Maths if you know the density or area at your inlet.