A second-order resolvent formulation for the analysis of turbulent flow structures
نویسندگان
چکیده
An attempt to improve the accuracy of resolvent-based predictions by including velocity correlations in linear model is developed here. Closure assumptions for unresolved nonlinearities are thus pushed back a higher order. Turbulent channel flow considered as test case: response and forcing modes obtained from singular value decomposition new resolvent compared Spectral Proper Orthogonal Decomposition (SPOD) extracted Direct Numerical Simulation (DNS) database. The performance approach also measured against previous models. does not yield significant global improvement, but some regions. Further work on method should target modeling velocity-pressure gradient correlation tensor.
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ژورنال
عنوان ژورنال: Comptes rendus
سال: 2023
ISSN: ['1873-7234']
DOI: https://doi.org/10.5802/crmeca.193