Towards a Chaotic Adjoint for LES
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Authors
Blonigan, Patrick
Fernandez, P
Murman, SM
Wang, Qiqi
Rigas, G
Magri, L
Conference Name
Center for Turbulence Research Proceedings of the Summer Program
Type
Conference Object
This Version
AM
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Blonigan, P., Fernandez, P., Murman, S., Wang, Q., Rigas, G., & Magri, L. Towards a Chaotic Adjoint for LES. Center for Turbulence Research Proceedings of the Summer Program. https://doi.org/10.17863/CAM.35422
Abstract
Adjoint-based sensitivity analysis methods are powerful tools for engineers who use
ow simulations for design. However, the conventional adjoint method breaks down for
scale-resolving simulations like large-eddy simulation (LES) or direct numerical simula-
tion (DNS), which exhibit the chaotic dynamics inherent in turbulent
ows. Sensitivity
analysis based on least-squares shadowing (LSS) avoids the issues encountered by con-
ventional methods, but has a high computational cost. The following report outlines a
new, more computationally e cient formulation of LSS, non-intrusive LSS, and estimates
its cost for several canonical
ows using Lyapunov analysis.
Sponsorship
Royal Academy of Engineering (RAEng)
Identifiers
External DOI: https://doi.org/10.17863/CAM.35422
This record's URL: https://www.repository.cam.ac.uk/handle/1810/288107
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