A Kelvin Structure consists of multiple unit cells, which can be defined under the Unit Cell tab. The size of a cell is defined by their length in each direction, Grid Length X, Grid Length Y, and Grid Length Z. The default values define a Kelvin structure of 100 x 100 x 75 µm, but these values can be changed as shown below.

The total size of the final Kelvin structure is the product of the grid lengths and the number of cells (Number Cells X, Number Cells Y, and Number Cells Z) that should be generated in the three directions in the Domain panel.

Additionally, an Inlet and Outlet for the structure can be specified. The full size of the foam in Z-direction is the result of combining the Grid Length Z for all cells and the size of the Inlet (below) and Outlet (above) void regions.

The following foams are generated without and with Inlet and Outlet.

The final size of the domain is shown in the chosen metrical unit as Width (X), Length (Y), and Height (Z) in the Domain panel of the Unit Cell tab. Also shown is the number of voxels in each direction (NX, NY, and NZ), which depends on the defined Voxel Length.