skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modeling subgrid scale mixture fraction variance in LES of evaporating spray

Abstract

Simulations of a dilute spray evaporating in spatially decaying homogeneous turbulence are performed. An Eulerian description of the flow is adopted, while the behavior of the discrete liquid phase is captured using Lagrangian modeling. Time and length scales of the continuous carrier phase are fully simulated; and by varying the properties of the modeled spray, a database of spray carrier phase direct numerical simulation (CP-DNS) is obtained. The CP-DNS is then filtered on a coarse grid to conduct a priori tests of subgrid scale (SGS) closures. The objective is to provide methods for approximating the level of SGS mixture fraction variance in large eddy simulation (LES) of fuel spray turbulent combustion. Direct estimation of the variance from the scales resolved in LES is first discussed. Then, the solving of a balance equation to get the variance is addressed, with closures for the scalar dissipation rate and the correlation between vapor source and mixture fraction. From the results, a procedure to couple spray evaporation with SGS turbulent combustion modeling emerges. (author)

Authors:
; ; ;  [1]
  1. LMFN, UMR-CNRS-6614-CORIA, INSA and Universite de Rouen, Campus du Madrillet, Avenue de l'Universite, BP 8, 76801 Saint-Etienne-du-Rouvray (France)
Publication Date:
OSTI Identifier:
20824150
Resource Type:
Journal Article
Journal Name:
Combustion and Flame
Additional Journal Information:
Journal Volume: 146; Journal Issue: 4; Other Information: Elsevier Ltd. All rights reserved; Journal ID: ISSN 0010-2180
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; MATHEMATICAL MODELS; SPRAYS; COMPUTERIZED SIMULATION; EVAPORATION; TURBULENCE

Citation Formats

Pera, Cecile, Reveillon, Julien, Vervisch, Luc, and Domingo, Pascale. Modeling subgrid scale mixture fraction variance in LES of evaporating spray. United States: N. p., 2006. Web. doi:10.1016/J.COMBUSTFLAME.2006.07.003.
Pera, Cecile, Reveillon, Julien, Vervisch, Luc, & Domingo, Pascale. Modeling subgrid scale mixture fraction variance in LES of evaporating spray. United States. https://doi.org/10.1016/J.COMBUSTFLAME.2006.07.003
Pera, Cecile, Reveillon, Julien, Vervisch, Luc, and Domingo, Pascale. 2006. "Modeling subgrid scale mixture fraction variance in LES of evaporating spray". United States. https://doi.org/10.1016/J.COMBUSTFLAME.2006.07.003.
@article{osti_20824150,
title = {Modeling subgrid scale mixture fraction variance in LES of evaporating spray},
author = {Pera, Cecile and Reveillon, Julien and Vervisch, Luc and Domingo, Pascale},
abstractNote = {Simulations of a dilute spray evaporating in spatially decaying homogeneous turbulence are performed. An Eulerian description of the flow is adopted, while the behavior of the discrete liquid phase is captured using Lagrangian modeling. Time and length scales of the continuous carrier phase are fully simulated; and by varying the properties of the modeled spray, a database of spray carrier phase direct numerical simulation (CP-DNS) is obtained. The CP-DNS is then filtered on a coarse grid to conduct a priori tests of subgrid scale (SGS) closures. The objective is to provide methods for approximating the level of SGS mixture fraction variance in large eddy simulation (LES) of fuel spray turbulent combustion. Direct estimation of the variance from the scales resolved in LES is first discussed. Then, the solving of a balance equation to get the variance is addressed, with closures for the scalar dissipation rate and the correlation between vapor source and mixture fraction. From the results, a procedure to couple spray evaporation with SGS turbulent combustion modeling emerges. (author)},
doi = {10.1016/J.COMBUSTFLAME.2006.07.003},
url = {https://www.osti.gov/biblio/20824150}, journal = {Combustion and Flame},
issn = {0010-2180},
number = 4,
volume = 146,
place = {United States},
year = {Fri Sep 15 00:00:00 EDT 2006},
month = {Fri Sep 15 00:00:00 EDT 2006}
}