[voingiappone]

Hello again everybody,

as I already explained here, I want to insert a tracer in my simulation to calculate the mixing time of the reactor.
I want to consider only the liquid phase as I am going to insert a certain amount of NaCl as tracer and follow the time evolution of the concentration with a probe.

Now I was just able to add the tracer using as a base the wiki page on how to add temperature to icoFoam. However, if I run the simulation I get my tracer propagating out of the liquid phase through the interface into the gas.

Watching this thread (http://www.cfd-online.com/Forums/ope...interfoam.html) I made an idea of how to read physical properties for different phases but I cannot figure out how to make my equation to be solved only for the liquid phase.
To put things simple, now it looks like it is just overlapping the liquid-gas system (i have a global equation, a global diffusion coefficient, etc). See attached screenshot (tracer concentration profile on the right).

Is there anybody who can help me with this task?

Thanks!