Description
The species concentrations reported by MSX at nodes don't seem to match with the concentrations reported in pipes. For example, in the simple example network provided with the MSX manual, Pipe 1 flows into Node A, and Pipe 2 and Pipe 3 flow out of Node A. The NH2Cl concentration reported at Node A is higher than the NH2Cl concentrations reported in any of these 3 pipes once they have all reached steady concentrations. This doesn't make sense to me - how can the concentration at a node be higher than the concentrations in any of the entering or exiting pipes? The following 3 files are in the attached .zip folder, which highlight the issue.
chloramine.inp - EPANET input file for the simple example network provided with the manual
chloramine.msx - MSX input file that produces the results discussed above
chloramine.rpt - report file generated from running 'chloramine.inp' with 'chloramine.msx'. This shows Node A having higher NH2Cl concentrations than any of the pipes that enter or exit Node A. Concentrations are steady at Node A and all 3 pipes by hour 8.