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Old   March 26, 2015, 21:17
Default Result Pressures
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KARINA THOME
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We are doing some simulations in order to evaluate resulting pressures in the entry of diversion sluiceways. In this case study we have the opportunity of comparing the simulation results with the small scale model results.
We are facing difficulties understanding the results obtained in these simulations.
The discharge capacity results are very similar to the results in the reduced model, however, the results of pressures are beyond expected and far beyond of the physical sense (we're getting pressures on the order of -25 mca).
For reasons of convenience and simulation time, these studies began with a bidimensional model, which means, only one element transverse to the flow (“y” axis) and without turning on the turbulence model, and only turning on the “GRAVITY” model on the tab "FISICS". Several simulations were done switching mesh size, changing the refining,..., and all attempts resulted in nonsense pressure values.
We inserted in the model various "PROBES" for extracting pressure values, exactly in the same positions where we have physical model results (for comparing), but as we said, it is not even possible to compare the simulation results with the reduced model because the simulation results are beyond expectations.
Anyone know what's going on? Why that pressure results are so outside reality?
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