LES/PDF based modeling of soot-turbulence interactions in turbulent flames

Pratik Donde; Venkat Raman; Michael E. Mueller; Heinz Pitsch

doi:10.1016/j.proci.2012.07.055

LES/PDF based modeling of soot-turbulence interactions in turbulent flames

Pratik Donde
, Venkat Raman
, Michael E. Mueller
, Heinz Pitsch

Research output: Contribution to journal › Conference article › peer-review

68 Scopus citations

Abstract

A large eddy simulation (LES)/probability density function (PDF) approach is used to describe the small-scale soot-turbulence-chemistry interactions. The PDF approach directly evolves the joint statistics of the gas-phase scalars and a set of moments of the soot number density function. This LES/PDF approach is then used to simulate a turbulent natural gas jet diffusion flame. Since the PDF equation is high dimensional, a Lagrangian method formulated in cylindrical coordinates is coupled to the Eulerian solution technique for the LES flow equations. The LES/PDF simulations show that soot formation is highly intermittent and is always restricted to the fuel-rich region of the flow. The PDF of soot moments has a wide spread leading to a large subfilter variance. Further, the conditional statistics of soot moments conditioned on mixture fraction and reaction progress variable show strong correlation between the gas phase composition and soot moments.

Original language	English (US)
Pages (from-to)	1183-1192
Number of pages	10
Journal	Proceedings of the Combustion Institute
Volume	34
Issue number	1
DOIs	https://doi.org/10.1016/j.proci.2012.07.055
State	Published - 2013
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemical Engineering
Mechanical Engineering
Physical and Theoretical Chemistry

Keywords

Large eddy simulation
Non-premixed turbulent flames
Probability density function
Soot
Soot-turbulence-chemistry interactions

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10.1016/j.proci.2012.07.055

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@article{520f082f11204e97a169e7f1c26fb207,

title = "LES/PDF based modeling of soot-turbulence interactions in turbulent flames",

abstract = "A large eddy simulation (LES)/probability density function (PDF) approach is used to describe the small-scale soot-turbulence-chemistry interactions. The PDF approach directly evolves the joint statistics of the gas-phase scalars and a set of moments of the soot number density function. This LES/PDF approach is then used to simulate a turbulent natural gas jet diffusion flame. Since the PDF equation is high dimensional, a Lagrangian method formulated in cylindrical coordinates is coupled to the Eulerian solution technique for the LES flow equations. The LES/PDF simulations show that soot formation is highly intermittent and is always restricted to the fuel-rich region of the flow. The PDF of soot moments has a wide spread leading to a large subfilter variance. Further, the conditional statistics of soot moments conditioned on mixture fraction and reaction progress variable show strong correlation between the gas phase composition and soot moments.",

keywords = "Large eddy simulation, Non-premixed turbulent flames, Probability density function, Soot, Soot-turbulence-chemistry interactions",

author = "Pratik Donde and Venkat Raman and Mueller, \{Michael E.\} and Heinz Pitsch",

note = "Funding Information: This work was financially supported by DoD SERDP program (WP-2151 and WP-1574) with Dr. Bruce Sartwell as the program manager. The authors are grateful for the generous allocation of computing time from the Texas Advanced Computing Center, without which these computations would not have been possible. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.",

year = "2013",

doi = "10.1016/j.proci.2012.07.055",

language = "English (US)",

volume = "34",

pages = "1183--1192",

journal = "Proceedings of the Combustion Institute",

issn = "1540-7489",

publisher = "Elsevier Ltd",

number = "1",

}

TY - JOUR

T1 - LES/PDF based modeling of soot-turbulence interactions in turbulent flames

AU - Donde, Pratik

AU - Raman, Venkat

AU - Mueller, Michael E.

AU - Pitsch, Heinz

N1 - Funding Information: This work was financially supported by DoD SERDP program (WP-2151 and WP-1574) with Dr. Bruce Sartwell as the program manager. The authors are grateful for the generous allocation of computing time from the Texas Advanced Computing Center, without which these computations would not have been possible. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2013

Y1 - 2013

N2 - A large eddy simulation (LES)/probability density function (PDF) approach is used to describe the small-scale soot-turbulence-chemistry interactions. The PDF approach directly evolves the joint statistics of the gas-phase scalars and a set of moments of the soot number density function. This LES/PDF approach is then used to simulate a turbulent natural gas jet diffusion flame. Since the PDF equation is high dimensional, a Lagrangian method formulated in cylindrical coordinates is coupled to the Eulerian solution technique for the LES flow equations. The LES/PDF simulations show that soot formation is highly intermittent and is always restricted to the fuel-rich region of the flow. The PDF of soot moments has a wide spread leading to a large subfilter variance. Further, the conditional statistics of soot moments conditioned on mixture fraction and reaction progress variable show strong correlation between the gas phase composition and soot moments.

AB - A large eddy simulation (LES)/probability density function (PDF) approach is used to describe the small-scale soot-turbulence-chemistry interactions. The PDF approach directly evolves the joint statistics of the gas-phase scalars and a set of moments of the soot number density function. This LES/PDF approach is then used to simulate a turbulent natural gas jet diffusion flame. Since the PDF equation is high dimensional, a Lagrangian method formulated in cylindrical coordinates is coupled to the Eulerian solution technique for the LES flow equations. The LES/PDF simulations show that soot formation is highly intermittent and is always restricted to the fuel-rich region of the flow. The PDF of soot moments has a wide spread leading to a large subfilter variance. Further, the conditional statistics of soot moments conditioned on mixture fraction and reaction progress variable show strong correlation between the gas phase composition and soot moments.

KW - Large eddy simulation

KW - Non-premixed turbulent flames

KW - Probability density function

KW - Soot

KW - Soot-turbulence-chemistry interactions

UR - https://www.scopus.com/pages/publications/84877701447

UR - https://www.scopus.com/pages/publications/84877701447#tab=citedBy

U2 - 10.1016/j.proci.2012.07.055

DO - 10.1016/j.proci.2012.07.055

M3 - Conference article

AN - SCOPUS:84877701447

SN - 1540-7489

VL - 34

SP - 1183

EP - 1192

JO - Proceedings of the Combustion Institute

JF - Proceedings of the Combustion Institute

IS - 1

ER -

LES/PDF based modeling of soot-turbulence interactions in turbulent flames

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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