119 citations · 168 across the 4 of their papers we have counts for
9 papers
Scaling and interaction of self-similar modes in models of high-Reynolds number wall turbulence
A S Sharma, R Moarref, B J McKeon
Previous work has established the usefulness of the resolvent operator that maps the terms nonlinear in the turbulent fluctuations to the fluctuations themselves. Further work has…
Low-dimensional representations of exact coherent states of the Navier-Stokes equations from the resolvent model of wall turbulence
Ati S. Sharma, Rashad Moarref, Beverley J. McKeon +3
We report that many exact invariant solutions of the Navier-Stokes equations for both pipe and channel flows are well represented by just few modes of the model of McKeon & Sharma…
A foundation for analytical developments in the logarithmic region of turbulent channels
Rashad Moarref, Ati S. Sharma, Joel A. Tropp +1
An analytical framework for studying the logarithmic region of turbulent channels is formulated. We build on recent findings (Moarref et al., J. Fluid Mech., 734, 2013) that the ve…
A low-order decomposition of turbulent channel flow via resolvent analysis and convex optimization
R. Moarref, M. R. Jovanovic, J. A. Tropp +2
We combine resolvent-mode decomposition with techniques from convex optimization to optimally approximate velocity spectra in a turbulent channel. The velocity is expressed as a we…
Deconstructing wall turbulence -visualization of resolvent modes
Daniel Barella, Sarah Churng, Conrad Egan +6
This article accompanies a fluid dynamics video entered into the Gallery of Fluid Motion of the 66th Annual Meeting of the APS Division of Fluid Dynamics.
Model-based scaling of the streamwise energy density in high-Reynolds number turbulent channels
Rashad Moarref, Ati S. Sharma, Joel A. Tropp +1
We study the Reynolds number scaling and the geometric self-similarity of a gain-based, low-rank approximation to turbulent channel flows, determined by the resolvent formulation o…