Figure 11.
The line graph displays two variables, the average hydrogen outflow rate measured in kilograms per square metre per second plotted against the ratio of element size to the scale of fluctuation. The vertical axis shows the average hydrogen outflow rate ranging from 0 to 2.5 times 10 to the power of negative 7. The horizontal axis represents the ratio ranging from 0 to 1.5 with ticks at increments of 0.1. Two sets of data are represented by distinct lines, one marked as average gas outflow and the other as sample average saturation degree. The graph includes annotations for each line type and uses various symbols to differentiate the data points, ensuring clarity in the visual representation of the relationship between the two variables.Effect of mesh size on average hydrogen outflow rate (black markers) and sample saturation degree (white markers) for a 20 mm sample under HP2D condition. Ten random field realisations are considered, indicated by different marker shapes, which are mapped onto meshes with different element sizes. The horizontal axis indicates the ratio between the mesh element size (), and the scale of fluctuation of the random field (). In this study: 4.5 mm