Matches in SemOpenAlex for { <https://semopenalex.org/work/W2007692073> ?p ?o ?g. }
Showing items 1 to 90 of
90
with 100 items per page.
- W2007692073 abstract "In this paper, we analyze two effects caused by the Lagrangian nature of turbulent transfer which are usually ignored in the theory of turbulent premixed combustion. These effects are (i) the nonequilibrium behavior of the turbulent diffusion coefficient, which is important for modeling the initial stage of combustion (for example, in the spark ignition engine), and (ii) the existence of a traveling front of turbulent diffusion with finite speed, which controls the velocity of the steady state flame in strong turbulence. However, in order to derive simple and exact results, the hydrodynamical and the combustion subproblems are stated to be independent by assuming a constant density so that a passive chemical reaction is actually considered. First, we derive a parabolic diffusion equation with both diffusion and chemical source terms expressed by Lagrangian characteristics of turbulence. We show that, in general, the diffusivity of product particles is not zero in the moment of their generation by chemical transformation and this result is important for combustion theories that relate the formation of the initial flame with the development of the diffusion coefficient. Afterward, a hyperbolic diffusion equation based on hydrodynamics is derived with turbulent diffusion front velocity Uf=⟨u′2⟩1/2, where ⟨u′2⟩1/2 is the root mean square of turbulent velocity fluctuations, and we analyze the relationships between Uf and the speed of the steady state premixed flame Utss. In particular, for the flamelet combustion mechanism, we obtain Utss=(Uf2+SL2)1/2, where SL is the normal laminar flame speed. This result shows that, in moderate turbulence (⟨u′2⟩1/2∼SL), the usually assumed relation Utss=Uf+SL is not consistent with an accurate statistical analysis and more when Uf≃SL gives a percent error around 40%, which cannot be neglected in applications. In strong turbulence case (⟨u′2⟩1/2⪢SL), the value of the flame speed is very close to that of the diffusion front velocity." @default.
- W2007692073 created "2016-06-24" @default.
- W2007692073 creator A5015221131 @default.
- W2007692073 creator A5042311723 @default.
- W2007692073 date "2011-03-01" @default.
- W2007692073 modified "2023-10-14" @default.
- W2007692073 title "Lagrangian properties of turbulent diffusion with passive chemical reaction in the framework of the premixed combustion theory" @default.
- W2007692073 cites W1630436113 @default.
- W2007692073 cites W1970348574 @default.
- W2007692073 cites W1972224529 @default.
- W2007692073 cites W1972869425 @default.
- W2007692073 cites W1981640053 @default.
- W2007692073 cites W1985715354 @default.
- W2007692073 cites W2007058479 @default.
- W2007692073 cites W2009575580 @default.
- W2007692073 cites W2014330610 @default.
- W2007692073 cites W2014978862 @default.
- W2007692073 cites W2046659334 @default.
- W2007692073 cites W2049805527 @default.
- W2007692073 cites W2062003767 @default.
- W2007692073 cites W2070445714 @default.
- W2007692073 cites W2076228522 @default.
- W2007692073 cites W2128254052 @default.
- W2007692073 cites W2166151565 @default.
- W2007692073 doi "https://doi.org/10.1063/1.3562842" @default.
- W2007692073 hasPublicationYear "2011" @default.
- W2007692073 type Work @default.
- W2007692073 sameAs 2007692073 @default.
- W2007692073 citedByCount "3" @default.
- W2007692073 countsByYear W20076920732014 @default.
- W2007692073 countsByYear W20076920732015 @default.
- W2007692073 countsByYear W20076920732016 @default.
- W2007692073 crossrefType "journal-article" @default.
- W2007692073 hasAuthorship W2007692073A5015221131 @default.
- W2007692073 hasAuthorship W2007692073A5042311723 @default.
- W2007692073 hasConcept C105923489 @default.
- W2007692073 hasConcept C110808204 @default.
- W2007692073 hasConcept C121332964 @default.
- W2007692073 hasConcept C129474609 @default.
- W2007692073 hasConcept C147789679 @default.
- W2007692073 hasConcept C159063594 @default.
- W2007692073 hasConcept C185592680 @default.
- W2007692073 hasConcept C196558001 @default.
- W2007692073 hasConcept C207870545 @default.
- W2007692073 hasConcept C2778513689 @default.
- W2007692073 hasConcept C37668627 @default.
- W2007692073 hasConcept C57879066 @default.
- W2007692073 hasConcept C6506403 @default.
- W2007692073 hasConcept C69357855 @default.
- W2007692073 hasConcept C74650414 @default.
- W2007692073 hasConcept C76563973 @default.
- W2007692073 hasConcept C83104080 @default.
- W2007692073 hasConcept C97355855 @default.
- W2007692073 hasConceptScore W2007692073C105923489 @default.
- W2007692073 hasConceptScore W2007692073C110808204 @default.
- W2007692073 hasConceptScore W2007692073C121332964 @default.
- W2007692073 hasConceptScore W2007692073C129474609 @default.
- W2007692073 hasConceptScore W2007692073C147789679 @default.
- W2007692073 hasConceptScore W2007692073C159063594 @default.
- W2007692073 hasConceptScore W2007692073C185592680 @default.
- W2007692073 hasConceptScore W2007692073C196558001 @default.
- W2007692073 hasConceptScore W2007692073C207870545 @default.
- W2007692073 hasConceptScore W2007692073C2778513689 @default.
- W2007692073 hasConceptScore W2007692073C37668627 @default.
- W2007692073 hasConceptScore W2007692073C57879066 @default.
- W2007692073 hasConceptScore W2007692073C6506403 @default.
- W2007692073 hasConceptScore W2007692073C69357855 @default.
- W2007692073 hasConceptScore W2007692073C74650414 @default.
- W2007692073 hasConceptScore W2007692073C76563973 @default.
- W2007692073 hasConceptScore W2007692073C83104080 @default.
- W2007692073 hasConceptScore W2007692073C97355855 @default.
- W2007692073 hasIssue "3" @default.
- W2007692073 hasLocation W20076920731 @default.
- W2007692073 hasOpenAccess W2007692073 @default.
- W2007692073 hasPrimaryLocation W20076920731 @default.
- W2007692073 hasRelatedWork W1480727113 @default.
- W2007692073 hasRelatedWork W1991045681 @default.
- W2007692073 hasRelatedWork W2024228722 @default.
- W2007692073 hasRelatedWork W2089152874 @default.
- W2007692073 hasRelatedWork W2093187628 @default.
- W2007692073 hasRelatedWork W2355676855 @default.
- W2007692073 hasRelatedWork W2387636578 @default.
- W2007692073 hasRelatedWork W2765265099 @default.
- W2007692073 hasRelatedWork W627952463 @default.
- W2007692073 hasRelatedWork W2161257103 @default.
- W2007692073 hasVolume "23" @default.
- W2007692073 isParatext "false" @default.
- W2007692073 isRetracted "false" @default.
- W2007692073 magId "2007692073" @default.
- W2007692073 workType "article" @default.