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physics.flu-dyn2023
Identifying invariant solutions of wall-bounded three-dimensional shear flows using robust adjoint-based variational techniques
Omid Ashtari, Tobias M. Schneider
Invariant solutions of the Navier-Stokes equations play an important role in the spatiotemporally chaotic dynamics of turbulent shear flows. Despite the significance of these solut…
physics.flu-dyn2023
Symmetry-reduced low-dimensional representation of large-scale dynamics in the asymptotic suction boundary layer
Matthias Engel, Omid Ashtari, Moritz Linkmann
An important feature of turbulent boundary layers are persistent large-scale coherent structures in the flow. Here, we use Dynamic Mode Decomposition (DMD), a data-driven technique…