A data-driven subgrid scale model in Large Eddy Simulation of turbulent premixed combustion
A data-driven subgrid scale model in Large Eddy Simulation of turbulent premixed combustion
复制标题
湍流预混燃烧大涡模拟中数据驱动的亚网格尺度模型
DOI:
10.1016/j.combustflame.2021.111486
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发表时间:
2021
影响因子:
4.4
通讯作者:
M. Pfitzner
中科院分区:
文献类型:
--
作者:
J. Shin;A. Lampmann;M. Pfitzner
We derive a data-driven model of a subgrid scale (SGS) closure for turbulent premixed combustion in the context of Large Eddy Simulation (LES) using deep learning. We validate the model through LES of the direct numerical simulation (DNS) flame configuration and compare it to other subgrid models from the literature. The filtered DNS used as training data was provided by Lapeyre et al. (2019). The neural network developed in this study was designed to estimate the SGS flame surface density, using only local progress variable values as a basis.A prioritests show that the results inferred from the frozen neural network were comparable to results obtained from the convolutional neural networks (CNNs) using the full nonlocal set of variables, and were in good agreement with the filtered DNS. A model-agnostic method for interpreting machine learning was employed to investigate the behavior of the trained neural network.A posteriorievaluation using the network as an LES subgrid model demonstrates that the proposed data-driven modeling is more accurate than classical algebraic models in terms of the integrated flame area in the axial direction. This illustrates that the proposed data-driven subgrid model to represent the non-linear unresolved terms is a successful approximation from both ana prioriand ana posterioriperspective and that only fully local values in the filtered domain suffice to yield good agreement with DNS results. This is in contrast to earlier attempts, which use the full LES domain dataset as input to the network.
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DOI:
10.1007/s10494-019-00028-w
发表时间:
2019-04
期刊:
Flow, Turbulence and Combustion
影响因子:
--
作者:
Z. Nikolaou;C. Chrysostomou;L. Vervisch;S. Cant
通讯作者:
Z. Nikolaou;C. Chrysostomou;L. Vervisch;S. Cant
DOI:
10.1080/10407782.2016.1257309
发表时间:
2017-01
期刊:
Numerical Heat Transfer, Part A: Applications
影响因子:
--
作者:
U. Allauddin;M. Klein;M. Pfitzner;N. Chakraborty
通讯作者:
U. Allauddin;M. Klein;M. Pfitzner;N. Chakraborty
影响因子:
4.4
作者:
Andrea Seltz;P. Domingo;L. Vervisch;Z. Nikolaou
通讯作者:
Z. Nikolaou
影响因子:
1.3
作者:
T. Ma;O. Stein;N. Chakraborty;Achim Kempf
通讯作者:
T. Ma;O. Stein;N. Chakraborty;Achim Kempf
影响因子:
2.6
作者:
M. Immer
通讯作者:
M. Immer