Diffusion
 

I didnt find this anywhere in the manual. In the Full Multi-Component section the maxwell stefan equations are written explicitly with velocities for each species. This does not mean that the NS equations are solved seperately for each species, right?
Only for each of the n species there will be an additional continuity equation (in fact there will be n-1 continuity equations and the bulk species is calculated from 1-sum_i Y_i... what if I have 2 species 50/50 ? What is the bulk species which is not calculated??? Is that at all anyhow sensible with maxwell stefan multicomponent diffusion or do I need to have one bulk species which really makes up say 99% of the fluid?) and the momentum equations are just solved once for the total fluid with rho being the total sum of all constituents?
Is that correction, or will there be momentum equations for each species?