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Mélanger des gaz raides pour créer de nouvelles lois d'état

Abstract : EDF needs reliable numerical simulations of two-phase flow phenomena for safety issue. Some hypothetical accidental scenarios involve rapid transients with important mass transfer. A model able to account for thermodynamical disequilibria may be needed. Currently, to describe each phase, the codes use either simple analytical equations of state like the stiffened gas equation of state, realistic only around a reference point ; or look-up tables of complex equations of state, CPU-time consuming. During the "Semaine d'Etudes Maths Entreprise" (SEME), we wondered if the water steam could be approached by a stiffened gas or a mix of two stiffened gases. We first conducted an analysis of thermodynamics equations in order to formulate a state equation in the (p, T) plane, before building a parameters optimization algorithm to approximate the IAPWS-97 formulation, the reference equation of state for water built from a set of measurements.
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https://hal.archives-ouvertes.fr/hal-02114552
Contributor : Lucie Quibel <>
Submitted on : Monday, April 29, 2019 - 5:08:50 PM
Last modification on : Thursday, October 29, 2020 - 4:20:02 PM

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Lucie Quibel, Philippe Helluy, Marie Chion, Philippe Ricka. Mélanger des gaz raides pour créer de nouvelles lois d'état. [Rapport de recherche] IRMA, Université de Strasbourg; EDF R&D. 2019. ⟨hal-02114552⟩

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