Figure 2.
The image presents two illustrations related to gas testing setup and model configuration. On the left, the test setup includes labelled components such as an upstream cylinder, specimen cell, pressure transducer, and downstream cylinder, arranged vertically on a perforated panel. On the right, the model configuration shows a cross section of a cylinder with a sample labelled sample, F E B E X, indicating gas injection at the top and gas drainage at the bottom. Next to the cylinder is an image showing raw F E B E X material, representing the sample composition. The layout clearly illustrates the functional components and their relationships, providing insight into the experimental design.Test setup (Gutiérrez-Rodrigo et al., 2021) (a) and model configuration (b)