Towards a Chaotic Adjoint for LES
Center for Turbulence Research Proceedings of the Summer Program
MetadataShow full item record
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
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.
Royal Academy of Engineering (RAEng)
External DOI: https://doi.org/10.17863/CAM.35422
This record's URL: https://www.repository.cam.ac.uk/handle/1810/288107