i am working on a simulation for 2 gases injecting at different time in a tube. I have set the inlet velocity at one opening and another opening as atmosphere pressure.
1) Helium at the inlet and the velocity is 0.00371 (m/s) for 2 minutes
2) And then, blow in Methane at the inlet and the velocity is 0.00371 (m/s) for another 2 minutes
I wanted to check with the interaction of helium and methane at time dependent. How can i set that up?
Best Regards,
Timothy
Hi Chun,
For your setup you would create a time dependence of the mass fraction for the inlet flow where the first two minutes are a mass fraction 1 helium 0 methane then at two minutes the mass fraction transitions to 0 helium 1 methane. This video (GoEngineer - SOLIDWORKS Flow Simulation: Transient Pressure Pulse) shows the application of a time dependent function to a pressure boundary but the same time dependence functionality would also work for mass fractions on a flow inlet.
This video also shows some insights into the mixing of fluids but making the assumption that the chamber initially starts full of the first fluid (Helium) then the inlet inflows the second fluid (Methane) just to show the mixing portion of the analysis (GoEngineer - SOLIDWORKS Flow Simulation: Fluid Mixing Transient Analysis). This might be a simpler approach to getting result data for what you are analyzing here.