Figure 7.
In both graphs, the horizontal axis represents the number of grid elements, ranging from zero to eight million. The first graph, labelled lowercase a in parentheses, presents a decreasing trend in the variable N subscript u. The values begin at approximately forty-eight point two and decline to about forty-six point eight as the number of grid elements increases. Data points labelled A through E are plotted and connected by a dashed line to illustrate the downward trend. The second graph, labelled lowercase b in parentheses, shows an increasing trend in the variable f, starting at approximately forty-three point seven and rising to around forty-four point five. This graph also includes points A through E connected by a dashed line.Grid independence analysis
Source: Authors’ own work