反応乱流場のLESにおけるサブグリッドスケール反応モデル

概要

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A subgrid-scale model for the filtered reaction term is presented to develope the large eddy simulation (LES) of nonpremixed, turbulent reacting flows. The subgrid-scale model is based on the subgrid-scale probability density function (PDF) and subgrid-scale conditional expectation. The subgrid-scale PDF is assumed to follow the beta distribution and the subgrid-scale conditional expectation is given using the filtered data obtained from the direct numerical simulation of an air mixing layer downstream of turbulence generating grids with a second-order chemical reaction. Further, the subgrid-scale model for the filtered reaction term is evaluated by comparing with the DNS. The results show that the subgrid-scale model can accurately estimate the filtered reaction term and it is applicable to the LES of turbulent reacting flows.
一般社団法人日本機械学会の論文
1999-03-25