Effluent cell

[Continuum]

Hello,

If I have a 10-cell model column, would SOLUTION 11 be the effluent?
Or would the effluent essentially be the end of my cell, at SOLUTION 10?

May I get a clarification on this following statement as well?

"The numerical scheme is for cell-centered concentrations, which has consequences for data interpretation. Thus, the composition in a boundary cell is a half-cell distance away from the column outlet and needs a half time step to arrive at (or from) the column end. The half time step must be added to the total residence time in the column when effluent from a column is simulated"

If my timestep is 24 seconds, and I have say 10 shifts, how would I go about adding 12 seconds to the total residence time in the column? It's not like I can do 10.5 shifts.

Thank you very much.

[dlparkhurst]

Solution 10 is the current content of cell 10. Solution 11 is the solution that was transported out of cell 10 in the current transport step.

No, you cannot do fractional shifts, but you can plot the data at the time of 10.5 shifts, which approximates the time and solution composition that leaves the cell boundary.