The central files in SPRING are the ASCII model files name.net and name.3d. The name.net file contains all the information for a 2D model or the data of the topmost layer for a 3D model. The name.3d file contains the information for the deeper layers. These files are usually created or modified by SPRING interactively. However, they can also be edited using any editor.

During the model checking, the model files are read in and written to binary background files. The subsequent calculation modules will read the data required for you from these background files and also save the results there. For the graphic visualisation of the input or results data (plot generation), the data are read from the background files and used for generating the relevant plot. This can be followed by having SPRING redisplay, re-edit and print out the plots on a plotter or printer.

The SPRING interface is used for compiling the model, calculating the flow and generating the plot and is opened by double-click with the left mouse button on the icon on the desktop.

 

Now the program is started with step 1:Generating an FE mesh by automatic mesh generation!