Hi @ggiraldof ,
Thank you for your response. I’ve created this sample project to test what I’m hoping to do. See attached screen shots and the link posted at the bottom.
At the left boundary, 400 ppm passive scalar with inlet velocity u_x = 1m/s was applied. At each cube in the first row to the left, a passive scalar was assigned with a value of -200ppm, at u_x = 1 m/s.
The result appears for the most part as I would expect, with values ranging from 200-400ppm as the CO2 depleted air exiting each cube mixes with the CO2 rich air in the atmosphere (400ppm). However, as can be seen in the figure above, and highlighted in the figure below showing an iso-volume displaying regions with passive scalar values between 0-199; some regions appear to go below the exit condition of 200ppm. Is there any way to constrain the passive scalar quantities to avoid this?
The test project can be seen here: Offshore DAC concept by rfoxall | SimScale.
The simulations discussed above is simulation found under “Passive scalar array 2x5”, called “Run 6- +400 inlet, -200 passive scalar”.
Thanks very much.