TUFLOW 2D Cell Size Selection: Difference between revisions
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[[File:Mesh_Converge_XS_20m.png|500px]][[File:Mesh_Converge_XS_10m.png|500px]][[File:Mesh_Converge_XS_05m.png|500px]]<br>
Unfortunately it isn't practical for all models to be designed at an infinitely fine resolution due to the impact it has on simulation speed. Increasing a model resolution will make a simulation run slower. As a rule of thumb, halving the cell size in a model will typically increase the simulation run time by a factor 8. This is due to the number of cells increasing by a factor of (4) four and the necessity for a calculation timestep half that of the larger resolution, translating to (2) twice the number of calculations (4 x 2 = 8).
The challenge for modellers is knowing what resolution is necessary to achieve results that are fit for purpose with sufficient accuracy. <br>
<u>[https://tuflow.com/download/Australian_Rainfall_Runoff_Project15_TwoDimensional_Modelling_DraftReport.pdf Australian Rainfall and Runoff Guideline - Two Dimensional Modelling in Urban and Rural Floodplain]</u> provides some recommendations on this topic. It states: <br>
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