Extended Vofire algorithm for fast transient fluid-structure dynamics with liquid-gas flows and interfaces

International audienceThe present paper is dedicated to the simulation of liquid–gas flows with interfaces inthe framework of fast transient fluid–structure dynamics. The two-fluid interface ismodelled as a discontinuity surface in the fluid property. We use an anti-dissipativeFinite-Volume discretization strategy for unstructured meshes in order to capture theposition of the interface within a thin diffused volume. This allows to control thenumerical diffusion of the artificial mixing between components and provide an accuratecapture of complex interface motions. This scheme is an extension of the Vofirenumerical solver. We propose specific developments in order to handle flows thatinvolved high density ratio between liquid and gas. The resulting scheme capabilities arevalidated on basic examples and also tested against large scale fluid–structure testderived from the MARA 10 experiment. All simulations are performed using EURO-PLEXUS fast transient dynamics software