Topology of pocket formation in turbulent premixed flames

Trivedi, S.; Griffiths, R.; Kolla, H.; Chen, J. H.; Cant, R. S.

doi:10.1016/j.proci.2018.06.197

Topology of pocket formation in turbulent premixed flames

Journal Article · Wed Aug 08 00:00:00 EDT 2018 · Proceedings of the Combustion Institute

DOI:https://doi.org/10.1016/j.proci.2018.06.197· OSTI ID:1465803

^[1]; Griffiths, R. ^[1]; Kolla, H. ^[2]; Chen, J. H. ^[2]; Cant, R. S. ^[1]

Univ. of Cambridge, Cambridge (United Kingdom)
Sandia National Lab. (SNL-CA), Livermore, CA (United States)

In turbulent premixed flame propagation, the formation of isolated pockets of reactants or products is associated with flame pinch–off events which cause rapid changes in the flame surface area. Previous topological analysis of these phenomena has been carried out based on Morse theory and Direct Numerical Simulation (DNS) in two spatial dimensions. The present work extends the topological analysis to three dimensions with emphasis on the formation and subsequent burnout of reactant pockets. Singular behaviour observed previously for terms of the Surface Density Function (SDF) transport equation in the two–dimensional case is shown to occur also in three dimensions. Further singular behaviour is observed in the displacement speed close to reactant pocket burnout. In conclusion, the theory is compared against DNS data from hydrogen–air flames and good agreement is obtained.

Research Organization:: Sandia National Laboratories (SNL-CA), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1465803

Report Number(s):: SAND--2017-13724J; 666465

Journal Information:: Proceedings of the Combustion Institute, Journal Name: Proceedings of the Combustion Institute Journal Issue: 2 Vol. 37; ISSN 1540-7489

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

Flame Annihilation Displacement Speed and Stretch Rate in Turbulent Premixed Flames Haghiri, Ali; Talei, Mohsen; Brear, Michael J. Flow, Turbulence and Combustion, Vol. 104, Issue 4 https://doi.org/10.1007/s10494-019-00078-0	journal	November 2019
Evolution of local flame displacement speeds in turbulence Dave, Himanshu L.; Chaudhuri, Swetaprovo Journal of Fluid Mechanics, Vol. 884 https://doi.org/10.1017/jfm.2019.896	journal	December 2019

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Direct numerical simulation
Flame surface topology
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Topology of pocket formation in turbulent premixed flames

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