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A Large Scale Interface Approach to Speed-up Transmission Calculations
Technical Paper
2021-01-0689
ISSN: 0148-7191, e-ISSN: 2688-3627
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SAE WCX Digital Summit
Language:
English
Abstract
For transmission engineers, numerical simulations open new possibilities to find
the best design out of multiple design variations. For efficient usage of such
methods, each design variation must be calculated in a timely manner. The
overall performance of a transmission is evaluated throughout several rotations
calculated on a 3D moving part. Such calculations are computationally expensive
and faster modelling approaches are needed. Volume of fluid is one of the most
common numerical approaches used for these configurations. In order to achieve
numerical stability and accuracy, the mesh size must be small enough to capture
the small scales at the interface. In this work a new mixture multiphase - large
scale interface (MMP-LSI) approach was applied for which a large-scale interface
individuation criterion is introduced along with the mixture multiphase
approach. Such criterion calculates an appropriate closure depending on the
regime, accounting for surface tension effects and applying turbulence damping
to mimic laminar effects in the vicinity of the interface. It is demonstrated
that MMP-LSI allows for larger time steps with respect to VOF. A thorough
comparison of the two approaches is carried out in terms of numerical stability,
results differences and speed-up. The model is implemented in Simcenter
STAR-CCM+ and applied to a 2D two-gear gearbox.
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Citation
Locci, C., Seeley, W., and Mann, D., "A Large Scale Interface Approach to Speed-up Transmission Calculations," SAE Technical Paper 2021-01-0689, 2021, https://doi.org/10.4271/2021-01-0689.Data Sets - Support Documents
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