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This is the timescale for the simulation. The Fluent user manual states to use a fraction of the time scale for the time step size and a fraction of 10 of the timescale is a good time step size. The number of time steps gives the time elapsed in the flow. 200 time steps are used to give 20 sec worth of flow. The amount of iterations per time step is defaulted at 20. Iterations per time step between 60 and 150 were used for the multiple simulations with different positions of shapes.
Simulation of the Plate in Flocculator
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