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<p>Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity</p> <p><b>New page</b></p><div>== Summary ==<br /> Relative discretisation error and computing time of a second-order model compared with a 0.1 m grid. Based on McGrattan (2007), p. 5-1.<br /> <br /> Original illustration for [[Mesh resolution]], level 4 Expert.<br /> <br /> * Source basis: McGrattan (2007), p. 5-1 (error proportional to the square of the cell size; halving gives one quarter of the error and 16 times the computing time); McGrattan et al. (2026), p. 47 (time step tied to cell size by the CFL condition)<br /> * Alt text: Log chart: as cells shrink from 0.4 m to 0.025 m, relative error falls from 16 to 0.06 while relative computing time rises from 0.004 to 256.<br /> <br /> == Licensing ==<br /> New drawing by Fire Safety Academy. © Fire Safety Academy.</div>

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