TUFLOW 2D Cell Size Selection: Difference between revisions
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{| class="wikitable "
| '''Cell Size''' || '''Model Size <br> (Cell Count)'''|| '''Simulation Run Time <br> (seconds)''' || '''Judgement of Convergence <br> (Yes / No)''' || '''Required GPU Memory <br> (GB)'''
|-
| 10m (33ft) || 188,240 || 284 || Yes || 0.15
|-
| 20m (66ft) || 47,080 || 98 || Yes || 0.04
|-
| 50m (164ft) || 7,540 || 32 || Yes || 0.01
|-
| 100m (328ft) || 1,880 || 15 || Yes || <0.01
|-
| 150m (492ft) || 840 || 10 || No || <0.01
|-
| 200m (656ft) || 480 || 9 || No || <0.01
|-
| 250m (820ft) || 300 || 7 || No || <0.01
|}
Since simulation time is not a limiting factor in this case, selection of cell size only needs to consider the result accuracy. What is appropriate in terms of accuracy is influenced by the intended use of the model. For example, if lot scale assessment of inundation and structural damage risk is required, selection of the 10m (33ft) cell size may be appropriate to provide high resolution mapping of the velocity gradients. Alternatively, if the model is only intended to inform broad-scale inundation risk, the 50m (164ft) or 100m (328ft) cell size may be sufficient.
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