External pathways produce the following outputs:
•value(s) for the user-defined output arguments; and
•the mass flux of each species for all specified advective Outflows.
The types and dimensions of the user-defined outputs are specified by the user when they are created. The flux outputs are vectors by species with dimensions of mass/time.
You specify that you wish to save these results in two different places:
1. All user-defined outputs are saved by clicking Final Values and/or Time History at the bottom of the External pathway editing dialog:
Checking one of these causes all user-defined output arguments to be saved. If you wish to save only one or two of these as results, you can use the context menu of the output (accessed via a right-click) in the browser to turn on or off a particular output. In this case, the checkbox in the dialog would become gray (indicating that some of the results will be saved). The display units for these outputs are defined when the output is created.
As discussed below, if your user-defined outputs are arrays and you are running multiple realizations, time histories are only saved if the output is linked to a Time History Result element.
2. Fluxes are saved by selecting a mass flux link in the Inflows or Outflows tab for a linked pathway and clicking Save Final Values and/or Save Time History at the bottom of the dialog:
If you are running multiple realizations, the Time History box is ignored, and unless an output of the element is connected to a Time History Result element, no time history results will be saved at all for the element. In fact, in such a case, the Save Results section would look like this:
In this particular case, because the simulation involves multiple realizations, the “Time History” checkbox is replaced by a “Monte Carlo Histories” checkbox. This checkbox is grayed out, since it is only used for information purposes. You cannot edit it directly, and its appearance is completely determined by whether or not the output is connected to a Time History Result element. That is, in order to save time history results for an External output when running multiple realizations, you must connect it to a Time History Result element.
The display units for masses, concentrations and fluxes for all pathways are specified in the Contaminant Transport tab of the Options dialog (accessed via Model | Options… from the main menu):
