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A filtered flame approach for simulation of unsteady laminar premixed flames

Duwig, Christophe LU (2009) In Combustion Theory and Modelling 13(2). p.251-268
Abstract
The simulation of laminar flames consists of capturing the evolution of a very large number of species that may react within a broad range of time scales. It results in a highly non-linear stiff numerical problem that requires large computational resources. In the present paper, an alternative approach for the simulation of unsteady premixed flames is proposed. The approach focuses on describing the flame using a single scalar only (so-called progress variable) on relatively coarse grids. The unresolved details of the flame structure are analysed and described in term of spatial filtering. A model originally developed for large eddy simulation is discussed in the framework of unsteady laminar flames. The ability of the present approach to... (More)
The simulation of laminar flames consists of capturing the evolution of a very large number of species that may react within a broad range of time scales. It results in a highly non-linear stiff numerical problem that requires large computational resources. In the present paper, an alternative approach for the simulation of unsteady premixed flames is proposed. The approach focuses on describing the flame using a single scalar only (so-called progress variable) on relatively coarse grids. The unresolved details of the flame structure are analysed and described in term of spatial filtering. A model originally developed for large eddy simulation is discussed in the framework of unsteady laminar flames. The ability of the present approach to represent the filtered flame structure is validated against detailed numerical simulations of freely propagating laminar flames. Further, simulations of steady and unsteady laminar Bunsen flames are presented with a focus on the influence of the numerical grid and filter width upon the flame dynamics. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
progress variable, premixed flame, laminar flame, Bunsen flame, acoustic excitation
in
Combustion Theory and Modelling
volume
13
issue
2
pages
251 - 268
publisher
Taylor & Francis
external identifiers
  • wos:000265292000003
  • scopus:67650251684
ISSN
1364-7830
DOI
10.1080/13647830802578429
language
English
LU publication?
yes
id
ac9a0578-5d1a-4948-a22e-23188c8664f4 (old id 1400358)
date added to LUP
2009-06-15 14:33:50
date last changed
2017-01-01 04:55:28
@article{ac9a0578-5d1a-4948-a22e-23188c8664f4,
  abstract     = {The simulation of laminar flames consists of capturing the evolution of a very large number of species that may react within a broad range of time scales. It results in a highly non-linear stiff numerical problem that requires large computational resources. In the present paper, an alternative approach for the simulation of unsteady premixed flames is proposed. The approach focuses on describing the flame using a single scalar only (so-called progress variable) on relatively coarse grids. The unresolved details of the flame structure are analysed and described in term of spatial filtering. A model originally developed for large eddy simulation is discussed in the framework of unsteady laminar flames. The ability of the present approach to represent the filtered flame structure is validated against detailed numerical simulations of freely propagating laminar flames. Further, simulations of steady and unsteady laminar Bunsen flames are presented with a focus on the influence of the numerical grid and filter width upon the flame dynamics.},
  author       = {Duwig, Christophe},
  issn         = {1364-7830},
  keyword      = {progress variable,premixed flame,laminar flame,Bunsen flame,acoustic excitation},
  language     = {eng},
  number       = {2},
  pages        = {251--268},
  publisher    = {Taylor & Francis},
  series       = {Combustion Theory and Modelling},
  title        = {A filtered flame approach for simulation of unsteady laminar premixed flames},
  url          = {http://dx.doi.org/10.1080/13647830802578429},
  volume       = {13},
  year         = {2009},
}