dz 10[mm] "Out-of-plane thickness"
L 1[m] "Side length of domain"
u0 0.01[mm/s] "Inlet fluid velocity"
cb 3[mol/m^3] "Parameter for flux expression"
kc 8e-5[m/h] "Parameter for flux expression"
conc 10[mol/m^3] "Concentration for boundary condition"
rho 1000[kg/m^3] "Fluid density"
visc 1e-3[s*Pa] "Fluid dynamic viscosity"