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Video runs at playback speed. Real time simulation = 2 seconds. Single phase simulations are an efficient method to deliver accurate results for many cases involving more than one fluid, such as gearboxes with low rotational speeds, where the behavior of one fluid is not significantly affected by the presence of the second. It is also generally possible to model the second, less-significant fluid phase as a boundary condition (for example drag force for air) if required. However, this situation changes when the second fluid phase becomes more influential and introduces additional effects which are not captured in basic single-phase simulations. For cases like gearbox simulations with high rotational speeds, multiphase simulations are the most accurate method to achieve realistic results. Normally, it can be computationally challenging to perform multiphase simulations, especially, when the density ratio between the two fluids is high. With this in mind, PreonLab 5.1 has made it possible to perform such multiphase simulations in an efficient way. This has proven to be highly advantageous in order to achieve more realistic simulation results for large gearboxes and for cases where high rotational speeds are involved. PreonLab 5.2 takes the benefits of multiphase simulations even further with a new time-stepping feature. Results obtained using this newly introduced feature are more comparable with the experimental data, such as torque loss values, than those obtained by utilizing single phase simulations. Another new feature in PreonLab 5.2 allows the usage of real bulk modulus values, which enhances the quality and accuracy of the simulation and improves the workflow by eliminating the need to fine-tune setup parameters.
