TUFLOW 2D Cell Size Selection: Difference between revisions
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== Test Case 1 - Discussion ==
The graphed results indicate convergence is observed for all cases with a cell resolution equal to or finer than 100m. The grid figures presented to the right of the graphs suggest the 100m cell resolution case has approximately (4) four cells laterally across the valley which the daybreak flow is contained within. Although the 400-600m wide valley isn't a traditional channel, the scale of flow associated with the dam break mean the valley is behaviour like one. Small drainage channels within the valley are too small to have a significant impact on the flood behaviour for flow conditions of this large magnitude. This result trend is consistent with the Australian Rainfall and Runoff recommendation for the flow in a channel, "In order to adequately resolve flow in a channel it is desirable to provide at least 5 grid/mesh elements laterally across the channel".
Simulation time can influence model resolution selection. This is not the case in this situation. All models have run in under 5 minutes using TUFLOW HPC's GPU hardware module.
= Test Case 2 - Urbanised Catchment =
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