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Turbulent diffusion of chemically reacting flows: Theory and numerical simulations
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholms University, Sweden.ORCID iD: 0000-0003-4308-7225
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2017 (English)In: Physical review. E, ISSN 2470-0045, E-ISSN 2470-0053, Vol. 96, no 5, 053111Article in journal (Refereed) Published
Abstract [en]

The theory of turbulent diffusion of chemically reacting gaseous admixtures developed previously [T. Elperin et al., Phys. Rev. E 90, 053001 (2014)] is generalized for large yet finite Reynolds numbers and the dependence of turbulent diffusion coefficient on two parameters, the Reynolds number and Damkohler number (which characterizes a ratio of turbulent and reaction time scales), is obtained. Three-dimensional direct numerical simulations (DNSs) of a finite-thickness reaction wave for the first-order chemical reactions propagating in forced, homogeneous, isotropic, and incompressible turbulence are performed to validate the theoretically predicted effect of chemical reactions on turbulent diffusion. It is shown that the obtained DNS results are in good agreement with the developed theory.

Place, publisher, year, edition, pages
American Physical Society, 2017. Vol. 96, no 5, 053111
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-219501DOI: 10.1103/PhysRevE.96.053111ISI: 000416028000010Scopus ID: 2-s2.0-85037078584OAI: oai:DiVA.org:kth-219501DiVA: diva2:1163487
Funder
Swedish Research Council
Note

QC 20171207

Available from: 2017-12-07 Created: 2017-12-07 Last updated: 2017-12-18Bibliographically approved

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Liberman, Michael A.

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