Reply To: How to simulate consumption of tracer during combined internal/external flow sim

[qnp5rg]

Hi Rob, thank you for your reply. Currently I am using an additional variable (as added and set up in CFX pre) as my "tracer". I have assigned it a diffusivity coefficient of 1.2e-9 and selected the diffusive transport equation to be solved. I also set the following boundary conditions:

Domain intialization: 0 kg/m^3 for tracer value

Velocity large inlet (on left of rectangular fluid domain): Velocity of 1 cm/s and tracer value of 0.1 kg/m^3

Velocity large outlet: Set as 0 Pa opening with zero flux

Mussel inlets: Velocity of 0.89 cm/s and tracer value of 0.05 kg/m^3

Mussel outlets: Velocity of 1 cm/s and tracer value of 0.025 kg/m^3

The mussel outlet and inlet are connected as the solid object has a fluid volume extracted from it and the outlet face area is 89% of the inlet face area hence the ratio of velocities (to maintain conservation of mass) 

Will this setup work or do I need to create a species and use that as my tracer as you suggested? I am not sure what expressions I should be creating for my mussel Inlet and outlet.