Abstract
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 language | English (US) |
|---|---|
| Title of host publication | ERCOFTAC Series |
| Publisher | Springer |
| Pages | 257-264 |
| Number of pages | 8 |
| DOIs | |
| State | Published - Jan 1 2019 |
Publication series
| Name | ERCOFTAC Series |
|---|---|
| Volume | 26 |
| ISSN (Print) | 1382-4309 |
| ISSN (Electronic) | 2215-1826 |
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ASJC Scopus subject areas
- Fluid Flow and Transfer Processes
- Computational Mathematics
Cite this
A dual-scale approach for modeling turbulent liquid/gas phase interfaces. / Kedelty, Dominic; Uglietta, James; Herrmann, Marcus.
ERCOFTAC Series. Springer, 2019. p. 257-264 (ERCOFTAC Series; Vol. 26).Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - A dual-scale approach for modeling turbulent liquid/gas phase interfaces
AU - Kedelty, Dominic
AU - Uglietta, James
AU - Herrmann, Marcus
PY - 2019/1/1
Y1 - 2019/1/1
N2 - 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].
AB - 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].
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U2 - 10.1007/978-3-030-12547-9_27
DO - 10.1007/978-3-030-12547-9_27
M3 - Chapter
AN - SCOPUS:85066293543
T3 - ERCOFTAC Series
SP - 257
EP - 264
BT - ERCOFTAC Series
PB - Springer
ER -