About Regions and Grids

This section or topic is specific to Console Mode.

For Graphical Mode, see Diffusion Module Terminology in Graphical Mode.

Also see Creating Regions and Gridpoints.

A region contains one or more phases. If a region contains several phases one of those must be entered as a matrix phase whereas the others are entered as spheroid.

A region must also contain a number of grid points. The composition is only known at these grid points and the software assumes that the composition varies linearly between them. The amount and composition of all the phases present at a single grid point in a certain region are those given by thermodynamic equilibrium keeping the over-all composition at the grid point fixed.

These grid types are used in diffusion simulations: automatic, linear, geometric, and double geometric. When you are setting up the simulation, in either Console Mode or Graphical Mode, a region must have a grid defined.