Large-eddy simulation of turbulence-radiation interactions in a turbulent planar channel flow

Ankur Gupta, Michael F. Modest, Daniel C. Haworth

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Large-eddy simulation (LES) has been performed for planar turbulent channel flow between two infinite, parallel, stationary plates. The capabilities and limitations of the LES code in predicting correct turbulent velocity and passive temperature field statistics have been established through comparison to direct numerical simulation data from the literature for nonreacting cases. Mixing and chemical reaction (infinitely fast) between a fuel stream and an oxidizer stream have been simulated to generate large composition and temperature fluctuations in the flow; here the composition and temperature do not affect the hydrodynamics (one-way coupling). The radiative transfer equation is solved using a spherical harmonics (P1) method, and radiation properties correspond to a fictitious gray gas with a composition- and temperature-dependent Planck-mean absorption coefficient that mimics that of typical hydrocarbon-air combustion products. Simulations have been performed for different optical thicknesses. In the absence of chemical reactions, radiation significantly modifies the mean temperature profiles, but temperature fluctuations and turbulence-radiation interactions (TRI) are small, consistent with earlier findings. Chemical reaction enhances the composition and temperature fluctuations and, hence, the importance of TRI. Contributions to emission and absorption TRI have been isolated and quantified as a function of optical thickness.

Original languageEnglish (US)
Pages (from-to)1-8
Number of pages8
JournalJournal of Heat Transfer
Volume131
Issue number6
DOIs
StatePublished - Jun 1 2009

Fingerprint

Large eddy simulation
large eddy simulation
channel flow
Channel flow
Turbulence
turbulence
Radiation
radiation
chemical reactions
Chemical reactions
optical thickness
interactions
Chemical analysis
Temperature
gray gas
temperature
combustion products
oxidizers
spherical harmonics
direct numerical simulation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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Large-eddy simulation of turbulence-radiation interactions in a turbulent planar channel flow. / Gupta, Ankur; Modest, Michael F.; Haworth, Daniel C.

In: Journal of Heat Transfer, Vol. 131, No. 6, 01.06.2009, p. 1-8.

Research output: Contribution to journalArticle

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