3 papers
physics.flu-dyn2025
Lighthill's mechanism and vorticity cascade in the logarithmic layer of wall turbulence
Samvit Kumar, Simon Toedtli, Tamer A. Zaki +1
We investigate Lighthill's proposed turbulent mechanism for near-wall concentration of spanwise vorticity by calculating mean flows conditioned on motion away from or toward the wa…
physics.flu-dyn2025
Spatio-temporal characterization of nonlinear forcing and response in turbulent channel flow
Yuting Huang, Simon S. Toedtli, Gregory P. Chini +1
The quadratic convection term in the incompressible Navier-Stokes equations is considered as a nonlinear forcing to the linear resolvent operator, and it is studied in the Fourier…
physics.flu-dyn2024
Coupled dynamics of wall pressure and transpiration, with implications for the modeling of tailored surfaces and turbulent drag reduction
Simon Toedtli, Anthony Leonard, Beverley McKeon
Wall-based active and passive flow control for drag reduction in low Reynolds number (Re) turbulent flows can lead to three typical phenomena: i) attenuation or ii) amplification o…