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physics.flu-dyn2025
Normality-based analysis of multiscale velocity gradients and energy transfer in direct and large-eddy simulations of isotropic turbulence
Rahul Arun, Mostafa Kamal, Tim Colonius +1
Symmetry-based analyses of multiscale velocity gradients highlight that strain self-amplification (SS) and vortex stretching (VS) drive forward energy transfer in turbulent flows.…
physics.flu-dyn2025
Spectral proper orthogonal decomposition of rapid snapshot pairs sampled at sub-Nyquist intervals
Caroline Cardinale, Steven L. Brunton, Tim Colonius
Modal decomposition methods are important for characterizing the low-dimensional dynamics of complex systems, including turbulent flows. Different methods have varying data require…
physics.flu-dyn2025
Boundary layer stability analysis using the nonlinear One-Way Navier-Stokes approach
Michael K. Sleeman, Matthew T. Lakebrink, Tim Colonius
We extend the One-Way Navier Stokes (OWNS) approach to support nonlinear interactions between waves of different frequencies, which will enable nonlinear analysis of instability an…