Reply To: Coupling NSE and ADE (Poiseuille Flow)
You can check out the thermal examples for a starting point, specifically the NavierStokesAdvectionDiffusionCoupling coupling operator used in e.g. examples/thermal/rayleighBenard3d.
In general, what you will want to do is implemement a coupling operator (cf. the FAQ section on how to write your own coupling in the user guide) that computes the velocity moment using the NSE lattice dynamics (commonly via CELL::computeU) and applies it to the ADE lattice (how this is done very much depends on the specific model you want to implement).