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Article
Solution of the first-order conditional moment closure for multiphase reacting flows using quadrature-based moment methods
Chemical Engineering Journal
  • Aziz Dogan Ilgun, Iowa State University
  • Rodney O. Fox, Iowa State University
  • Alberto Passalacqua, Iowa State University
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
2-1-2021
DOI
10.1016/j.cej.2020.127020
Abstract

The quadrature-based semi-analytical solution for the conditional moment closure (SA-CMC) given in (A. D. Ilgun, A. Passalacqua, and R. O. Fox, “A quadrature-based conditional moment closure for mixing-sensitive reactions,” Chem. Eng. Sci., 226, 2020) eliminates the additional conditioning-space discretization in CMC applications by assuming that the mixture-fraction PDF is well represented by a β-PDF. A Gaussian quadrature provides the mixture-fraction abscissae, and the conditional scalar mean is expressed in terms of Jacobi polynomials. Here, by preserving the computational efficiency of SA-CMC, a novel quadrature-based moment method (QBMM-CMC) is developed for CMC applications, which does not assume the form of the mixture-fraction PDF. Remarkably, by solving the closed forms for the micromixing terms from CMC, exact expressions result for the mixture-fraction moments of any order. Thus, QBMM-CMC covers cases where the mixture-fraction PDF cannot be well represented by a β-PDF and can be applied to disperse multiphase flows with mass transfer (e.g., droplet evaporation). For single-phase and multiphase pure-mixing problems, the QBMM-CMC mixture-fraction moments are observed to deviate from the β-PDF. For single-phase mixing with and without dispersed-phase mass transfer, QBMM-CMC predictions for mixing-sensitive competitive-consecutive and parallel reactions are investigated parametrically.

Comments

This is a manuscript of an article published as Ilgun, A. D., R. O. Fox, and A. Passalacqua. "Solution of the first-order conditional moment closure for multiphase reacting flows using quadrature-based moment methods." Chemical Engineering Journal (2020): 127020. DOI: 10.1016/j.cej.2020.127020. Posted with permission.

Creative Commons License
Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International
Copyright Owner
Elsevier B.V.
Language
en
File Format
application/pdf
Citation Information
Aziz Dogan Ilgun, Rodney O. Fox and Alberto Passalacqua. "Solution of the first-order conditional moment closure for multiphase reacting flows using quadrature-based moment methods" Chemical Engineering Journal Vol. 405 (2021) p. 127020
Available at: http://works.bepress.com/rodney_fox/86/