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Turbulent diffusion of chemically reacting flows: Theory and numerical simulations
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
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Number of Authors: 62017 (English)In: Physical review. E, ISSN 2470-0045, E-ISSN 2470-0053, Vol. 96, no 5, article id 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
2017. Vol. 96, no 5, article id 053111
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Physical Sciences
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URN: urn:nbn:se:su:diva-149975DOI: 10.1103/PhysRevE.96.053111ISI: 000416028000010OAI: oai:DiVA.org:su-149975DiVA, id: diva2:1169667
Available from: 2017-12-29 Created: 2017-12-29 Last updated: 2017-12-29Bibliographically approved

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Liberman, Michael
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