A dual-scale les subgrid model for turbulent liquid/gas phase interface dynamics

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Turbulent liquid/gas phase interface dynamics are at the core of many applications. For example, in atomizing flows, the properties of the resulting liquid spray are determined by the interplay of fluid and surface tension forces. The resulting dynamics typically span 4-6 orders of magnitude in length scales, making direct numerical simulations exceedingly expensive. This motivates the need for modeling approaches based on spatial filtering or ensemble averaging. In this paper, a dual-scale modeling approach is presented to describe turbulent two-phase interface dynamics in a large-eddy-simulation-type spatial filtering context. To close the unclosed terms related to the phase interface arising from filtering the Navier-Stokes equation, a resolved realization of the phase interface dynamics is explicitly filtered. This resolved realization is maintained on a high-resolution over-set mesh using a Refined Local Surface Grid approach [1] employing an un-split, geometric, bounded, and conservative Volumeof-Fluid method [2]. The required model for the resolved realization of the interface advection velocity includes the effects of sub-filter surface tension, dissipation, and turbulent eddies. Results of the dual-scale model are compared to recent direct numerical simulations of an interface in homogeneous isotropic turbulence [3].

Original languageEnglish (US)
Title of host publicationSymposia
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791857212
DOIs
StatePublished - Jan 1 2015
EventASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015 - Seoul, Korea, Republic of
Duration: Jul 26 2015Jul 31 2015

Publication series

NameASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015
Volume1

Other

OtherASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015
CountryKorea, Republic of
CitySeoul
Period7/26/157/31/15

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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    Herrmann, M. (2015). A dual-scale les subgrid model for turbulent liquid/gas phase interface dynamics. In Symposia (ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015; Vol. 1). American Society of Mechanical Engineers. https://doi.org/10.1115/AJKFluids201521052