Matches in SemOpenAlex for { <https://semopenalex.org/work/W2022072223> ?p ?o ?g. }
Showing items 1 to 95 of
95
with 100 items per page.
- W2022072223 endingPage "604" @default.
- W2022072223 startingPage "589" @default.
- W2022072223 abstract "A statistical theory is developed for the structure and propagation velocity of premixed flames in turbulent flows with scales large compared with the laminar flame thickness. The analysis, free of usual closure assumptions, involves a regular perturbation for small values of the ratio of laminar flame thickness to turbulence scale, termed the scale ratio ε, and a singular perturbation for large values of the non-dimensional activation temperature β. Any effects of the flame on the flow are considered to be given. In this initial study, molecular coefficients for diffusion of heat and reactants are set equal. The results identify convective-diffusive and reactive-diffusive zones in the flame and predict thickening of the flame by turbulence through streamwise displacement of the reactive-diffusive zone. Profiles for intensities of temperature fluctuations and for streamwise turbulent transport are obtained. A fundamental quantity occurring in the analysis is the longitudinal displacement of the reactive-diffusive zone in an Eulerian frame by turbulent fluctuations, and to first order in the scale ratio this equals the longitudinal displacement of fluid elements in an Eulerian frame by turbulent fluctuations, herein termed simply the Eulerian displacement. To first order in the scale ratio it is found that, if the Eulerian displacement experiences the same type of statistical non-stationarity as the corresponding Lagrangian displacement, then the diffusion approximation is valid for streamwise turbulent transport but the turbulent flame thickens as time increases, while if the Eulerian displacement is statistically stationary then the diffusion approximation necessitates a negative coefficient of diffusion in part of the flame but the flame thickness remains constant. By carrying the analysis to second order in the scale ratio it is shown that the turbulent-flame speed exceeds the laminar-flame speed by an amount proportional to the mean square of the transverse gradient of the Eulerian displacement. This result can be understood from the mechanistic viewpoint of a wrinkled laminar flame in terms of the increase in flame area produced by turbulence. Thus the theory provides a precise statistical quantification of the model of the wrinkled laminar flame for describing structures of turbulent flames." @default.
- W2022072223 created "2016-06-24" @default.
- W2022072223 creator A5010603427 @default.
- W2022072223 creator A5011904226 @default.
- W2022072223 date "1979-02-13" @default.
- W2022072223 modified "2023-10-16" @default.
- W2022072223 title "Theory of premixed-flame propagation in large-scale turbulence" @default.
- W2022072223 cites W80185074 @default.
- W2022072223 doi "https://doi.org/10.1017/s002211207900241x" @default.
- W2022072223 hasPublicationYear "1979" @default.
- W2022072223 type Work @default.
- W2022072223 sameAs 2022072223 @default.
- W2022072223 citedByCount "237" @default.
- W2022072223 countsByYear W20220722232012 @default.
- W2022072223 countsByYear W20220722232013 @default.
- W2022072223 countsByYear W20220722232014 @default.
- W2022072223 countsByYear W20220722232015 @default.
- W2022072223 countsByYear W20220722232016 @default.
- W2022072223 countsByYear W20220722232017 @default.
- W2022072223 countsByYear W20220722232018 @default.
- W2022072223 countsByYear W20220722232019 @default.
- W2022072223 countsByYear W20220722232020 @default.
- W2022072223 countsByYear W20220722232021 @default.
- W2022072223 countsByYear W20220722232022 @default.
- W2022072223 countsByYear W20220722232023 @default.
- W2022072223 crossrefType "journal-article" @default.
- W2022072223 hasAuthorship W2022072223A5010603427 @default.
- W2022072223 hasAuthorship W2022072223A5011904226 @default.
- W2022072223 hasConcept C105923489 @default.
- W2022072223 hasConcept C107551265 @default.
- W2022072223 hasConcept C110808204 @default.
- W2022072223 hasConcept C121332964 @default.
- W2022072223 hasConcept C129474609 @default.
- W2022072223 hasConcept C15744967 @default.
- W2022072223 hasConcept C178790620 @default.
- W2022072223 hasConcept C182748727 @default.
- W2022072223 hasConcept C18533594 @default.
- W2022072223 hasConcept C185592680 @default.
- W2022072223 hasConcept C196558001 @default.
- W2022072223 hasConcept C207870545 @default.
- W2022072223 hasConcept C37914503 @default.
- W2022072223 hasConcept C43058520 @default.
- W2022072223 hasConcept C53469067 @default.
- W2022072223 hasConcept C542102704 @default.
- W2022072223 hasConcept C57879066 @default.
- W2022072223 hasConcept C6506403 @default.
- W2022072223 hasConcept C69357855 @default.
- W2022072223 hasConcept C74650414 @default.
- W2022072223 hasConcept C76563973 @default.
- W2022072223 hasConcept C83104080 @default.
- W2022072223 hasConcept C97355855 @default.
- W2022072223 hasConceptScore W2022072223C105923489 @default.
- W2022072223 hasConceptScore W2022072223C107551265 @default.
- W2022072223 hasConceptScore W2022072223C110808204 @default.
- W2022072223 hasConceptScore W2022072223C121332964 @default.
- W2022072223 hasConceptScore W2022072223C129474609 @default.
- W2022072223 hasConceptScore W2022072223C15744967 @default.
- W2022072223 hasConceptScore W2022072223C178790620 @default.
- W2022072223 hasConceptScore W2022072223C182748727 @default.
- W2022072223 hasConceptScore W2022072223C18533594 @default.
- W2022072223 hasConceptScore W2022072223C185592680 @default.
- W2022072223 hasConceptScore W2022072223C196558001 @default.
- W2022072223 hasConceptScore W2022072223C207870545 @default.
- W2022072223 hasConceptScore W2022072223C37914503 @default.
- W2022072223 hasConceptScore W2022072223C43058520 @default.
- W2022072223 hasConceptScore W2022072223C53469067 @default.
- W2022072223 hasConceptScore W2022072223C542102704 @default.
- W2022072223 hasConceptScore W2022072223C57879066 @default.
- W2022072223 hasConceptScore W2022072223C6506403 @default.
- W2022072223 hasConceptScore W2022072223C69357855 @default.
- W2022072223 hasConceptScore W2022072223C74650414 @default.
- W2022072223 hasConceptScore W2022072223C76563973 @default.
- W2022072223 hasConceptScore W2022072223C83104080 @default.
- W2022072223 hasConceptScore W2022072223C97355855 @default.
- W2022072223 hasIssue "3" @default.
- W2022072223 hasLocation W20220722231 @default.
- W2022072223 hasOpenAccess W2022072223 @default.
- W2022072223 hasPrimaryLocation W20220722231 @default.
- W2022072223 hasRelatedWork W2022072223 @default.
- W2022072223 hasRelatedWork W2024228722 @default.
- W2022072223 hasRelatedWork W2070182252 @default.
- W2022072223 hasRelatedWork W2070243062 @default.
- W2022072223 hasRelatedWork W2152202876 @default.
- W2022072223 hasRelatedWork W2326037191 @default.
- W2022072223 hasRelatedWork W2502924722 @default.
- W2022072223 hasRelatedWork W2902098782 @default.
- W2022072223 hasRelatedWork W3174120402 @default.
- W2022072223 hasRelatedWork W817167045 @default.
- W2022072223 hasVolume "90" @default.
- W2022072223 isParatext "false" @default.
- W2022072223 isRetracted "false" @default.
- W2022072223 magId "2022072223" @default.
- W2022072223 workType "article" @default.