The engineering of unit cells is a way to carry out what-if experiments - for example how will the wettability of a porous building stone change after weathering, or how would the filtration characteristics of a filter change if the sinter was compressed by an additional 5 %.
The easiest way is to create a unit cell from the percolation products of your baseline material, and then alter the sizes of selected voids using the Targeted Modification facility.
Alternatively you can enter manual unit cells with varying parameters. Such an approach is appropriate if you wish to alter, for example, porosity, connectivity or correlation level of the network, but is not advised for altering sizes, as the effects of, for example, altering the throat skew and spread parameters operate via the background Euler beta distribution parameters.
The manual unit cell is based on the building screen and the parameters you choose to create a simulated intrusion curve using the dimensions and parameters you specify. A screen shot of the manual unit cell page is shown in the next figure.
A good way to use the manual unit cell screen is to keep all the parameters constant except for one parameter and see how this affects properties of the unit cell such as how the pore and throat size distribution is changed, or how the new unit cell filters particles. These changes provide users with the ability to perform sensitivity analyses which is commonly required for research purposes. By changing just one parameter and then running an identical batch operation on the new unit cell you can generate reports showing how the properties change. This can be used as a design tool for investigating properties of materials which you have not yet manufactured.
Purists may wish to attempt the generation of a unit cell from scratch - we suggest you contact us for advice if you wish to do that.