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Two-phase filtered mass density function for LES of turbulent reacting flows
Published online by Cambridge University Press: 05 November 2014
Abstract
This paper describes a new computational model developed based on the filtered mass density function (FMDF) for large-eddy simulation (LES) of two-phase turbulent reacting flows. The model is implemented with a unique Lagrangian–Eulerian–Lagrangian computational methodology. In this methodology, the resolved carrier gas velocity field is obtained by solving the filtered form of the compressible Navier–Stokes equations with high-order finite difference (FD) schemes. The gas scalar (temperature and species mass fractions) field and the liquid (droplet) phase are both obtained by Lagrangian methods. The two-way interactions between the phases and all the Eulerian and Lagrangian fields are included in the new two-phase LES/FMDF methodology. The results generated by LES/FMDF are compared with direct numerical simulation (DNS) data for a spatially developing non-reacting and reacting evaporating mixing layer. Results for two more complex and practical flows (a dump combustor and a double-swirl burner) are also considered. For all flows, it is shown that the two-phase LES/FMDF results are consistent and accurate.
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- © 2014 Cambridge University Press
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Present address: CCS-2 Computer and Computational Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
Present address: Altair Engineering Inc., 2685 Marine Way, Suite 1421, Mountain View, CA 94043, USA.
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