Sparse-Lagrangian FDF simulations of Sandia Flame E with density coupling
Sparse-Lagrangian FDF simulations of Sandia Flame E with density coupling
复制标题
具有密度耦合的 Sandia Flame E 的稀疏拉格朗日 FDF 模拟
DOI：
10.1016/j.proci.2010.06.035
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发表时间：
2011
影响因子：
4.4
通讯作者：
A. Klimenko
中科院分区：
文献类型：
--
作者：
Y. Ge;M. Cleary;A. Klimenko
对Sandia火焰E.广义多重映射条件（MMC）混合模型的拉格朗日场强制混合本地化的欧拉大涡模拟（LES）混合分数空间。局部消光的模拟水平由混合粒子的适当配对及其混合相互作用的时间尺度决定。本文提出的一个主要发展是通过使用适用于稀疏条件的等效焓法实现欧拉LES和拉格朗日粒子场之间的密度耦合。两个稀疏的模拟情况下，一个与一个拉格朗日粒子每8个欧拉LES网格单元和其他与一个粒子每32欧拉LES网格单元，结果表明，准确的FDF预测被动和反应标量可以实现一个相对温和的计算成本。
Sparse-Lagrangian filtered density function (FDF) simulations are performed for Sandia flame E. A generalised multiple mapping conditioning (MMC) mixing model for the Lagrangian field enforces mixing localisation in the Eulerian large eddy simulation (LES) mixture fraction space. The modelled level of local extinction is determined by the appropriate pairing of mixing particles and the timescale of their mixing interaction. A major development presented in this paper is the inclusion of density coupling between the Eulerian LES and Lagrangian particle fields achieved through use of the equivalent enthalpy method adapted for sparse conditions. Results for two sparse simulation cases, one with one Lagrangian particle per eight Eulerian LES grid cells and the other with one particle per 32 Eulerian LES grid cells, show that accurate FDF predictions of passive and reactive scalars can be achieved for a relatively modest computational cost.