Hi Ramiro,
great to hear, that you had success in setting up the total enthalpy method to at least some extent.
For adiabatic outlet boundaries openlb provied a special convection boundary type, which you can set via setAdvectionDiffusionConvectionBoundary
. For the other, stationary adiabatic boundaries, bounce back is what I used in my simulations, too.
Best regards,
Max