4 papers
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…
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…
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…
Spatio-temporal characterization of non-linear forcing in turbulence
Yuting Huang, Simon S. Toedtli, Gregory P. Chini +1
The quadratic convection term in the incompressible Navier-Stokes equations is considered as a non-linear forcing to the linear operator, and it is studied in the Fourier domain th…