boundary conditions

Hello
I work with the convection-diffusion equation, and I m looking for the concentration profile.
I have to implement four types of boundary conditions:
bottom of the channel: dC / dy = 0
the input C = 1
output dC / dx = 0
Top Channel dC / dy = 0
On a probe placed at the bottom of the channel: C = 0
I’mcompletely lost trying to translate those by LBM.
thanks

Hello,

try to use this paper: Yoshino, Inamuro “Lattice Boltzmann simulations for flow and heat/mass transfer problems in a three-dimensional porous structure”

Cheers,
Alex