An extended algebraic variational multiscale-multigrid-multifractal method (XAVM4) for large-eddy simulation of turbulent two-phase flow

U. Rasthofer, W. A. Wall, V. Gravemeier

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A novel and comprehensive computational method, referred to as the eXtended Algebraic Variational Multiscale-Multigrid-Multifractal Method (XAVM4), is proposed for large-eddy simulation of the particularly challenging problem of turbulent two-phase flow. The XAVM4 involves multifractal subgrid-scale modeling as well as a Nitsche-type extended finite element method as an approach for two-phase flow. The application of an advanced structural subgrid-scale modeling approach in conjunction with a sharp representation of the discontinuities at the interface between two bulk fluids promise high-fidelity large-eddy simulation of turbulent two-phase flow. The high potential of the XAVM4 is demonstrated for large-eddy simulation of turbulent two-phase bubbly channel flow, that is, turbulent channel flow carrying a single large bubble of the size of the channel half-width in this particular application.

Original languageEnglish
Pages (from-to)1-19
Number of pages19
JournalJournal of Computational Physics
Volume359
DOIs
StatePublished - 15 Apr 2018

Keywords

  • Extended finite element method
  • Large-eddy simulation
  • Multifractal subgrid-scale modeling
  • Turbulent bubbly channel flow
  • Turbulent two-phase flow
  • Variational multiscale method

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