29 citations · 85 across the 11 of their papers we have counts for
23 papers
State estimation in minimal turbulent channel flow: A comparative study of 4DVar and PINN
Yifan Du, Mengze Wang, Tamer A. Zaki
The state of turbulent, minimal-channel flow is estimated from spatio-temporal sparse observations of the velocity, using both a physics-informed neural network (PINN) and adjoint-…
Origin of Enhanced Skin Friction at the Onset of Boundary-Layer Transition
Mengze Wang, Gregory L. Eyink, Tamer A. Zaki
Boundary-layer transition is accompanied by a significant increase in skin friction whose origin is rigorously explained using the stochastic Lagrangian formulation of the Navier-S…
Simulations of turbulence over compliant walls
Amir Esteghamatian, Joseph Katz, Tamer A. Zaki
Direct numerical simulations of turbulent flow in a channel with one rigid and one viscoelastic wall are performed. An Eulerian-Eulerian model is adopted with a level-set approach…
Vorticity amplification in viscoelastic channel flows with long-wave surface distortions
Jacob Page, Tamer A. Zaki
Surface distortions to an otherwise planar channel flow introduce vorticity perturbations. We examine this scenario in viscoelastic fluids, and identify new mechanisms by which sig…
Ensemble-variational assimilation of statistical data in large eddy simulation
Vincent Mons, Yifan Du, Tamer A. Zaki
A non-intrusive data assimilation methodology is developed to improve the statistical predictions of large-eddy simulations (LES). The ensemble-variational (EnVar) approach aims to…
From limited observations to the state of turbulence: Fundamental difficulties of flow reconstruction
Tamer A. Zaki, Mengze Wang
Numerical simulations of turbulence provide non-intrusive access to all the resolved scales, although they often invoke idealizations that can compromise realism. In contrast, expe…