Development of high fidelity soot aerosol dynamics models using method of moments with interpolative closure
AuthorsRoy, Subrata P.
Arias, Paul G.
Lecoustre, Vivien R.
Haworth, Daniel C.
Im, Hong G.
Trouvé, Arnaud C.
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Mechanical Engineering Program
Clean Combustion Research Center
Computational Reacting Flow Laboratory (CRFL)
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AbstractThe method of moments with interpolative closure (MOMIC) for soot formation and growth provides a detailed modeling framework maintaining a good balance in generality, accuracy, robustness, and computational efficiency. This study presents several computational issues in the development and implementation of the MOMIC-based soot modeling for direct numerical simulations (DNS). The issues of concern include a wide dynamic range of numbers, choice of normalization, high effective Schmidt number of soot particles, and realizability of the soot particle size distribution function (PSDF). These problems are not unique to DNS, but they are often exacerbated by the high-order numerical schemes used in DNS. Four specific issues are discussed in this article: the treatment of soot diffusion, choice of interpolation scheme for MOMIC, an approach to deal with strongly oxidizing environments, and realizability of the PSDF. General, robust, and stable approaches are sought to address these issues, minimizing the use of ad hoc treatments such as clipping. The solutions proposed and demonstrated here are being applied to generate new physical insight into complex turbulence-chemistry-soot-radiation interactions in turbulent reacting flows using DNS. © 2014 Copyright Taylor and Francis Group, LLC.
SponsorsThis work has been supported by the National Science Foundation's PetaApps Program under awards made to multiple institutions: grants OCI-0904660, 0904484, and 0904649. The authors thank Drs. Ramanan Sankaran, Tianfeng Lu, and Kwan-Liu Ma for useful discussion and contributions in the code development.
PublisherInforma UK Limited
JournalAerosol Science and Technology