A multienvironment conditional probability density function model for turbulent reacting flows

dc.contributor.author Fox, Rodney
dc.contributor.author Raman, Venkatramanan
dc.contributor.department Chemical and Biological Engineering
dc.date 2018-02-14T01:09:31.000
dc.date.accessioned 2020-06-30T01:10:57Z
dc.date.available 2020-06-30T01:10:57Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2004
dc.date.embargo 2014-05-08
dc.date.issued 2004-12-01
dc.description.abstract <p>The multienvironment conditional probability density function (MECPDF) model was first proposed by Fox [Computational Models for Turbulent Reacting Flows (Cambridge University Press, Cambridge, 2003)] as a simple extension of multienvironment probability density function models for turbulent reacting flows. Like the conditional moment closure (CMC) and the laminar flamelet model (LFM), the MECPDF model describes the reacting scalars conditioned on the value of the mixture fraction. However, unlike CMC and LFM, the new model provides a consistent description of conditional fluctuations in both the scalar dissipation rate and the reacting scalars, and hence can be used to model partial extinction and reignition in homogeneous turbulent reacting flows. In this work, a general derivation of the MECPDF model is presented for a single reaction-progress variable using the direct quadrature method of moments. Extensions of the model to multiple reaction-progress variables and conditioning on the mixture-fraction vector are also discussed. After deriving the model, the closure assumptions are validated using direct simulations for pure diffusion of two randomly distributed, initially correlated scalar fields. Two homogeneous applications are then considered: nonreactive mixing starting from nontrivial initial conditions, and reactive mixing with partial extinction and reignition.</p>
dc.description.comments <p>This article is from <em>Physics of Fluids</em> 16 (2004): 4551-4565, doi: <a href="http://dx.doi.org/10.1063/1.1807771">10.1063/1.1807771</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/cbe_pubs/97/
dc.identifier.articleid 1102
dc.identifier.contextkey 5561856
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath cbe_pubs/97
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/13600
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/cbe_pubs/97/2004_FoxRO_AMultienvironmentConditionalProbability.pdf|||Sat Jan 15 02:36:21 UTC 2022
dc.source.uri 10.1063/1.1807771
dc.subject.disciplines Chemical Engineering
dc.subject.keywords Center for Turbulence Research
dc.title A multienvironment conditional probability density function model for turbulent reacting flows
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 75da3185-b167-47f1-977f-b54aa85bd649
relation.isOrgUnitOfPublication 86545861-382c-4c15-8c52-eb8e9afe6b75
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