Virtual or computer-generated materials are designed to capture the essential attributes of their real counterparts. However, computer simulation removes the constraints of the laboratory. This means that pore structure can be quickly and easily varied (and pushed to new limits) as a means to better understand its impact on bulk properties.

A number different algorithms are being used to generate computer-simulated materials. The one that is best suited for a given application depends strongly on the particular microstructure of the material. What is then done with the virtual material depends on the project goals. Collaborators in the area of mechanics are using models of particulate materials directly. Our emphasis is on structure and transport, which means the computer-generated materials serve as highly characterized domains for studying morphology or performing flow modeling.