The finite element mesh, boundary conditions and the fluid properties are stored in the gridfile, *.grf. Data in the gridfile are grouped into seven distinct blocks. Entered in a free format, the data in each block is stored within the key words BEGIN and END. These data blocks are:
NODES |
Coordinates of the nodes. |
ELEMENTS |
Node connectivity to define the cells and material properties. |
BOUNDARY |
Define boundary conditions |
BCASSIGN |
Assign boundary conditions to element/cell faces. |
MATERIAL |
Define material properties |
MATASSIGN |
Assign element material identifiers to MATERIAL |
FUNCTIONS |
Define data in the form of a function (table/expression) |
PROBLEMDATA |
Specify solution extract points |