TUFLOW 2D Cell Size Selection: Difference between revisions
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* A factor 3.0 increase in model resolution (eg. increasing the resolution from 30ft to 10ft) will increase the simulation time by a factor of 16.0.
This relationship is due to doubling the resolution (halving the cell size) increasing the number of cells by a factor (4) four and requiring half the time step to maintain stability (i.e. 2 two times the number of calculations).
The ratios for this test case don't match the above generalised trend exactly, though are close enough to be useful when optimising the cell size to meet project requirements.<br>
[[File:Mesh Converge Direct Rainfall Simulation Time Factor.png|700px]]
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