- #1
dRic2
When I set the differential equation (mass transfer) to find the the concentration profile of the i-spice I also need boundary condition to solve it. Inside the pipe (along its axis of symmetry) the concentration has a maximum (first derivate has to be 0), while on the internal surface... should I put the concentration egual to 0 (like i think) or should I force the function to have a minimum?