External Pathways provide a mechanism by which external program modules for contaminant transport (e.g., analytical, finite element or finite difference solute transport models) can be directly integrated into GoldSim. These modules (referred to as External pathway functions) are linked into GoldSim as DLLs (Dynamic Link Libraries) at run time. External pathways are specialized extensions of the External element.
An example file, ExternalPathway.gsm (and the corresponding DLL) can be found in the Contaminant Transport Examples folder in your GoldSim directory (accessed by selecting File | Open Example... from the main menu). The source code (in C++ and Fortran) for the example can be found in the General Examples/External folder in your GoldSim directory.
Learn more about:
Features and Capabilities of External Pathways
General Information Flow to and from and External Pathway
Defining External Pathway Properties
Flux Links to/from External Pathways