A monotonicity-preserving higher-order accurate finite-volume method for Kapila's two-fluid flow model

R. de Böck (Corresponding author), A.S. Tijsseling, Barry Koren

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Abstract

In preparation of the study of liquefied natural gas (LNG) sloshing in ships and vehicles, we model and numerically analyze compressible two-fluid flow. We consider a five-equation two-fluid flow model, assuming velocity and pressure continuity across two-fluid interfaces, with a separate equation to track the interfaces. The system of partial differential equations is hyperbolic and quasi-conservative. It is discretized in space with a tailor-made third-order accurate finite-volume method, employing an HLLC approximate Riemann solver. The third-order accuracy is obtained through spatial reconstruction with a limiter function, for which a novel formulation is presented. The non-homogeneous term is handled in a way consistent with the HLLC treatment of the convection operator. We study the one-dimensional case of a liquid column impacting onto a gas pocket entrapped at a solid wall. It mimics the impact of a breaking wave in an LNG containment system, where a gas pocket is entrapped at the tank wall below the wave crest. Furthermore, the impact of a shock wave on a gas bubble containing the heavy gas R22, immersed in air, is simulated in two dimensions and compared with experimental results. The numerical scheme is shown to be higher-order accurate in space and capable of capturing the important characteristics of compressible two-fluid flow.

Original languageEnglish
Article number104272
Number of pages16
JournalComputers and Fluids
Volume193
DOIs
Publication statusPublished - 30 Oct 2019

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Keywords

  • Finite-volume method
  • Hyperbolic system
  • Limiter functions
  • MUSCL
  • Source-term treatment
  • Two-fluid model
  • Wave impacts

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