If chemical reactions are to be simulated, the types of reactions to be simulated are chosen in the PHAST Chemistry Options dialog box. The time periods to be simulated in the model are specified in the PHAST Time Control dialog box. The choices related to the solution method are specified in the PHAST Solution Method dialog box.
Objects and Formulas are used to define the spatial data such as the distribution of hydraulic conductivity and the location of boundary conditions. The objects can be drawn on the top, front, or side views of the model or imported from external sources such as Shapefiles. It is also possible to import a background image to help when designing the model.
To create the flow input file for the model, select File|Export|PHAST Input File. The chemistry input file must be created outside of ModelMuse. Once all the PHAST input files are created, the user can execute PHAST from the command line or with a batch file. ModelMuse creates a batch file that can be used to execute PHAST at the same time that it creates the flow input file.
Model Viewer can be used to view the model results.