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Erschienen in: Flow, Turbulence and Combustion 2-3/2020

04.12.2019

Numerical Investigations of Phase-Separation During Multi-Component Mixing at Super-Critical Conditions

verfasst von: P. Tudisco, S. Menon

Erschienen in: Flow, Turbulence and Combustion | Ausgabe 2-3/2020

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Abstract

We study the effect of phase separation in multi-component mixing at super-critical conditions using a novel framework based on vapor-liquid equilibrium (VLE) thermodynamics in a real gas mixture. This approach is combined with a non-conservative Double-Flux (DF) numerical model to overcome numerical instabilities that arise when high-pressure, low-temperature mixtures are considered. The formulation developed and validated can handle VLE in multi-component mixtures even though most of the initial studies are focussed on binary mixtures. The challenges to get a robust solution of VLE thermodynamics are highlighted and we demonstrate the ability and the accuracy of the algorithms to account for VLE in canonical test cases, as well as in a shear layer binary mixing in a canonical temporal-mixing layer. Results are also compared against the classical, “dense-fluid” approach where an equation of state (EoS) is used with the assumption of a single-phase within each computational cell. Differences are highlighted and explained from a thermodynamic point of view with emphasis on the relevance and the applicability of VLE.

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Metadaten
Titel
Numerical Investigations of Phase-Separation During Multi-Component Mixing at Super-Critical Conditions
verfasst von
P. Tudisco
S. Menon
Publikationsdatum
04.12.2019
Verlag
Springer Netherlands
Erschienen in
Flow, Turbulence and Combustion / Ausgabe 2-3/2020
Print ISSN: 1386-6184
Elektronische ISSN: 1573-1987
DOI
https://doi.org/10.1007/s10494-019-00101-4

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