Reaction analogy based forcing for incompressible scalar turbulence
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Daniel, Don | - |
dc.contributor.author | Livescu, Daniel | - |
dc.contributor.author | Ryu, Jaiyoung | - |
dc.date.available | 2019-01-22T12:38:14Z | - |
dc.date.issued | 2018-09-06 | - |
dc.identifier.issn | 2469-990X | - |
dc.identifier.uri | https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/799 | - |
dc.description.abstract | We present a novel reaction analogy (RA) based forcing method for generating statistically stationary scalar fields in incompressible turbulence. The new method can produce more general scalar probability density functions (PDFs), for example, quasi-double-delta PDF, than current methods, while ensuring that scalar fields remain bounded, unlike existent forcing methodologies that can potentially violate naturally existing bounds. Such features are useful for generating initial fields in nonpremixed combustion, inlet conditions for spatially developing flows, or for studying non-Gaussian scalar turbulence. The RA method mathematically models hypothetical chemical reactions that convert reactants in a mixed state back into its pure unmixed components. Various types of chemical reactions are formulated and the corresponding mathematical expressions derived such that the reaction term is smooth in scalar space and is consistent with mass conservation. For large values of the scalar forcing rate, the method produces statistically stationary quasi-double-d scalar PDFs. Quasiuniform, Gaussian, and stretched exponential scalar statistics are recovered for smaller values of the scalar forcing rate. The shape of the scalar PDF can be further controlled by changing the stoichiometric coefficients of the reaction. The ability of the new method to produce fully developed passive scalar fields with quasi-Gaussian PDFs is also investigated, by exploring the convergence of the scalar variance spectrum to the Obukhov-Corrsin scaling and of the third-order mixed structure function to the "four-thirds" Yaglom's law. | - |
dc.publisher | AMER PHYSICAL SOC | - |
dc.title | Reaction analogy based forcing for incompressible scalar turbulence | - |
dc.type | Article | - |
dc.identifier.doi | 10.1103/PhysRevFluids.3.094602 | - |
dc.identifier.bibliographicCitation | PHYSICAL REVIEW FLUIDS, v.3, no.9 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.wosid | 000443921800002 | - |
dc.identifier.scopusid | 2-s2.0-85054481850 | - |
dc.citation.number | 9 | - |
dc.citation.title | PHYSICAL REVIEW FLUIDS | - |
dc.citation.volume | 3 | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | DIRECT NUMERICAL-SIMULATION | - |
dc.subject.keywordPlus | PASSIVE-SCALAR | - |
dc.subject.keywordPlus | ISOTROPIC TURBULENCE | - |
dc.subject.keywordPlus | HOMOGENEOUS TURBULENCE | - |
dc.subject.keywordPlus | MEAN GRADIENT | - |
dc.subject.keywordPlus | FLOWS | - |
dc.subject.keywordPlus | STATISTICS | - |
dc.subject.keywordPlus | TRANSITION | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Physics, Fluids & Plasmas | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
84, Heukseok-ro, Dongjak-gu, Seoul, Republic of Korea (06974)02-820-6194
COPYRIGHT 2019 Chung-Ang University All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.