Multicomponent Advection-Diffusion lattice

Has anyone implemented a multi-component thermal flow code? The system I am trying to simulate involves
two materials (one with a higher thermal diffusivity than the other). I was planning on using multiple AD lattices,
but was struggling a bit on figuring out how to couple the two lattices.


I do not know if it would be elegant of efficient enough for you …
But I think that if you use a scalar Field to track which phase is in which lattice position, than you could use only one AD lattice and choose the appropriate relaxation time as a function of the scalarField. But of course you should track the position of the two phases …