Volume 53, Number 4, July-August 2019
|Page(s)||1373 - 1389|
|Published online||11 July 2019|
A three-phase flow model with two miscible phases
EDF R&D, 6, Quiai Watier, 78400 Chatou, France
2 Université de Nantes, CNRS, Laboratoire de Mathématiques Jean Leray (LMJL – UMR 6629), 44000 Nantes, France
* Corresponding author: firstname.lastname@example.org
Accepted: 21 April 2019
The paper concerns the modelling of a compressible mixture of a liquid, its vapor and a gas. The gas and the vapor are miscible while the liquid is immiscible with the gaseous phases. This assumption leads to non symmetric constraints on the void fractions. We derive a three-phase three-pressure model endowed with an entropic structure. We show that interfacial pressures are uniquely defined and propose entropy-consistent closure laws for the source terms. Naturally one exhibits that the mechanical relaxation complies with Dalton’s law on the phasic pressures. Then the hyperbolicity and the eigenstructure of the homogeneous model are investigated and we prove that it admits a symmetric form leading to a local existence result. We also derive a barotropic variant which possesses similar properties.
Mathematics Subject Classification: 76T30 / 35L60 / 35Q35
Key words: Multi-component compressible flows / entropy / relaxation / phase transition / miscibility constraint / closure conditions / hyperbolicity
© EDP Sciences, SMAI 2019
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