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A localized artificial diffusivity method to simulate compressible multiphase flows using the stiffened gas equation of state
Author(s) -
Aslani Mohamad,
Regele Jonathan D.
Publication year - 2018
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.4668
Subject(s) - multiphase flow , compressibility , numerical diffusion , mechanics , equation of state , thermal diffusivity , classification of discontinuities , compressible flow , flow (mathematics) , statistical physics , computational fluid dynamics , fluid dynamics , diffusion equation , physics , mathematics , engineering , mathematical analysis , thermodynamics , metric (unit) , operations management
Summary The development of numerical approaches to perform direct numerical simulations of compressible multiphase flows has been an active field of research for several years. Proper treatment of fluid interfaces is crucial as important physics occur in this infinitesimally small region. Furthermore, the compressibility of the fluid requires proper treatment of discontinuities. Artificial diffusivity is among a number of methods widely used for compressible flows. This study develops a general form of consistent artificial diffusion fluxes and extends the localized artificial diffusivity method for high‐order central schemes to solve multiphase flows with an interface‐capturing method. These fluxes ensure an oscillation‐free interface for pressure, velocity, and temperature without employing a sharpening technique. Moreover, the high‐order representation of all scales in the flow helps capture the wide range of instabilities inherent in these flows. The goal is to develop an approach capable of performing high‐fidelity simulations supported by physics‐driven validation. This is achieved by solving the five‐equation model with the stiffened‐gas equation of state using the proposed method for multicomponent and multiphase flows on a variety of 1D and 2D problems.