Sparse-Lagrangian FDF simulation of Sandia flame E with modified density coupling

doi:10.3969/j.issn.0253-2778.2020.05.006

Journal of University of Science and Technology of China ›› 2020, Vol. 50 ›› Issue (5): 589-595.DOI: 10.3969/j.issn.0253-2778.2020.05.006

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Sparse-Lagrangian FDF simulation of Sandia flame E with modified density coupling

HUANG Lihang, ZHU Minming, YE Taohong

Department of Thermal Science and Energy Engineering， University of Science and Technology of China， Hefei 230027， China

Received:2019-03-22 Revised:2019-05-10 Accepted:2019-05-10 Online:2020-05-31 Published:2019-05-10

Abstract

Abstract: Sparse-Lagrangian filtered density function (FDF) simulation is performed for Sandia flame E. Sparse-Lagrangian Monte Carlo method is used to solve the scalar FDF transport equations, in which a generalized multiple mapping conditioning (MMC) model is implemented to enforce mixing localness. A modified density coupling method for Sparse-Lagrangian FDF is proposed, in which the conditional mean source term of equivalent enthalpy is fed back directly as the source term in the Eulerian equivalent enthalpy transport equation of large eddy simulation (LES). The results of Sparse-Lagrangian FDF simulation indicated that the new density coupling method is more reasonable than the previous ones in reducing the numerical errors in LES results, and that the simulation results agree well with the experimental data.

Key words: large eddy simulation (LES), filtered density function (FDF), density coupling, MMC mixing model

CLC Number:

TK16

HUANG Lihang, ZHU Minming, YE Taohong. Sparse-Lagrangian FDF simulation of Sandia flame E with modified density coupling[J]. Journal of University of Science and Technology of China, 2020, 50(5): 589-595.

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Sparse-Lagrangian FDF simulation of Sandia flame E with modified density coupling

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