Alexis COEPEAU, Celine BARANGER, Luc MIEUSSENS

DOI Number: N/A

Conference number: HiSST-2025-239

The Unified Gas-Kinetic Scheme (UGKS) differs from traditional deterministic methods in gas dynamics by providing a unified approach capable of resolving flow regimes, from rarefied to continuum, with a simulation time that remains independent of the flow regime. Its effectiveness in handling complex and multi-scale flows has been mainly demonstrated through Shakhov or Rykov models. Additionally, it has been applied to ES-BGK type models, although its use has thus far been restricted to monoatomic effects
only. Here, we aim to explore the application of UGKS to ES-BGK models in greater depth, extending its use from monoatomic to polyatomic gases by employing recent formulations. Particular attention will be given to validating this adaptation through numerical comparisons with codes from the literature, such as SPARTA for non-vibrating gas flows and PIClas for other cases, as it can handle polyatomic ES-BGK models, including vibrational phenomena.

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In Categories: 1.Events, 1.HiSST 2025, High-Speed Aerodynamics and Aerothermodynamics with application to hypersonic regimes
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