A dual-scale approach for modeling turbulent liquid/gas phase interfaces

Dominic Kedelty, James Uglietta, Marcus Herrmann

Research output: Chapter in Book/Report/Conference proceedingChapter


Advances to a dual-scale modeling approach [1] are presented to describe turbulent phase interface dynamics in a large-eddy-simulation-type spatial filtering context. Spatial filtering of the governing equations introduces several sub-filter terms that require modeling. Instead of developing individual closure-models for the terms associated with the interface, the dual-scale approach uses an exact closure by explicitly filtering a fully resolved realization of the phase interface. This resolved realization is maintained on a high-resolution over-set mesh. The advection equation for the phase interface on this DNS scale requires a model for the fully resolved interface advection velocity. This velocity is the sum of the filter scale LES velocity, available from the LES flow solver, and the sub-filter velocity fluctuation. The sub-filter velocity fluctuation is due to sub-filter turbulent eddies, reconstructed using a local fractal interpolation technique [2]. Results of the dual-scale model are compared to recent DNS of unit density and viscosity contrast interfaces in homogeneous isotropic turbulence without surface tension [3].

Original languageEnglish (US)
Title of host publicationERCOFTAC Series
Number of pages8
StatePublished - 2019

Publication series

ISSN (Print)1382-4309
ISSN (Electronic)2215-1826

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Computational Mathematics


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