An attempt to improve the accuracy of resolvent-based predictions by including velocity correlations in the linear model is developed here. Closure assumptions for unresolved nonlinearities are thus pushed back to a higher order. Turbulent channel flow is considered as a test case: response and forcing modes obtained from singular value decomposition of the new resolvent model are compared to Spectral Proper Orthogonal Decomposition (SPOD) modes extracted from a Direct Numerical Simulation (DNS) database. The performance of the approach is also measured against previous resolvent-based models. The new model does not yield significant global improvement, but does improve predictions in some regions. Further work on the method should target the linear modeling of the velocity-pressure gradient correlation tensor.
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Quentin Chevalier 1; Lesshafft Lutz 1; André V. G. Cavalieri 2
CC-BY 4.0
@article{CRMECA_2023__351_G2_355_0,
author = {Quentin Chevalier and Lesshafft Lutz and Andr\'e V. G. Cavalieri},
title = {A second-order resolvent formulation for the analysis of turbulent flow structures},
journal = {Comptes Rendus. M\'ecanique},
pages = {355--371},
publisher = {Acad\'emie des sciences, Paris},
volume = {351},
year = {2023},
doi = {10.5802/crmeca.193},
language = {en},
}
TY - JOUR AU - Quentin Chevalier AU - Lesshafft Lutz AU - André V. G. Cavalieri TI - A second-order resolvent formulation for the analysis of turbulent flow structures JO - Comptes Rendus. Mécanique PY - 2023 SP - 355 EP - 371 VL - 351 PB - Académie des sciences, Paris DO - 10.5802/crmeca.193 LA - en ID - CRMECA_2023__351_G2_355_0 ER -
%0 Journal Article %A Quentin Chevalier %A Lesshafft Lutz %A André V. G. Cavalieri %T A second-order resolvent formulation for the analysis of turbulent flow structures %J Comptes Rendus. Mécanique %D 2023 %P 355-371 %V 351 %I Académie des sciences, Paris %R 10.5802/crmeca.193 %G en %F CRMECA_2023__351_G2_355_0
Quentin Chevalier; Lesshafft Lutz; André V. G. Cavalieri. A second-order resolvent formulation for the analysis of turbulent flow structures. Comptes Rendus. Mécanique, Volume 351 (2023), pp. 355-371. doi : 10.5802/crmeca.193. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.193/
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