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dc.contributor.authorEr-Raiy, Aimad
dc.contributor.authorBoukharfane, Radouan
dc.contributor.authorParsani, Matteo
dc.date.accessioned2021-02-22T05:42:20Z
dc.date.available2021-02-22T05:42:20Z
dc.date.issued2021-01-04
dc.identifier.citationEr-Raiy, A., Boukharfane, R., & Parsani, M. (2021). Effects of differential diffusion and stratification characteristic length-scale on the propagation of a spherical methane-air flame kernel. AIAA Scitech 2021 Forum. doi:10.2514/6.2021-0680
dc.identifier.isbn9781624106095
dc.identifier.doi10.2514/6.2021-0680
dc.identifier.urihttp://hdl.handle.net/10754/667537
dc.description.abstractEarly flame kernel development and propagation in globally lean stratified fuel--air mixtures is of importance in various practical devices such as internal combustion engines. In this work, three-dimensional direct numerical simulation (DNS) is used to study the influence of the differential diffusion effects in a globally lean methane--air mixtures in presence of mixture heterogeneities with the goal of understanding the flame kernel behavior in such conditions. The DNS typical configuration corresponds to a homogeneous isotropic flow with an expanding spherical flame kernel. The local forced ignition of the kernel is performed by appending as source term in the sensible enthalpy transport equation that emulates spark ignition by energy deposit for a prescribed duration. The combustion chemistry is described with a skeletal methane-air mechanism, which i) features 14 species and 38 reactions, and ii) uses a multicomponent approach to evaluate transport coefficients. To assess the joint effects of differential diffusion and the stratification characteristic length-scale $L_{\Phi}$ on the flame kernel development, we considered cases with constant (unitary) and variable fuel Lewis number, both with different values for $L_{\Phi}$.
dc.description.sponsorshipThe research work was sponsored by King Abdullah University of Science and Technology (KAUST) and made use of the computer clusters at KAUST Supercomputing Laboratory (KSL) and the Supercomputing Laboratory and the Extreme Computing Research Center. The authors also thank Dr. Bilel Hadri at KSL for his technical assistance
dc.publisherAmerican Institute of Aeronautics and Astronautics (AIAA)
dc.relation.urlhttps://arc.aiaa.org/doi/10.2514/6.2021-0680
dc.rightsArchived with thanks to American Institute of Aeronautics and Astronautics
dc.titleEffects of differential diffusion and stratification characteristic length-scale on the propagation of a spherical methane-air flame kernel
dc.typeConference Paper
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentApplied Mathematics and Computational Science Program
dc.contributor.departmentExtreme Computing Research Center
dc.conference.date19–21 January 2021
dc.conference.nameAIAA Scitech 2021 Forum
dc.conference.locationVIRTUAL EVENT
dc.eprint.versionPre-print
pubs.publication-statusPublished
kaust.personEr-Raiy, Aimad
kaust.personBoukharfane, Radouan
kaust.personParsani, Matteo
dc.identifier.eid2-s2.0-85100316511
refterms.dateFOA2021-02-22T05:42:20Z
kaust.acknowledged.supportUnitcomputer clusters at KAUST
kaust.acknowledged.supportUnitExtreme Computing Research Center.
kaust.acknowledged.supportUnitKAUST Supercomputing Laboratory (KSL)


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