TUFLOW 2D Cell Size Selection: Difference between revisions

Unfortunately it isn't practical for all models to be designed at an infinitely fine resolution due to the costimpact 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.