Surface roughness can significantly influence the fluid dynamics and heat transfer in
convective flows by inducing perturbations in the velocity profile which affect surface drag …

Quadrant analysis is a simple, but quite useful, turbulence data-processing technique that
has been widely used, principally in the investigation of turbulent shear flows. This article …

Superhydrophobic (SHPo) surfaces have been investigated vigorously since around 2000
due in large part to their unique potential for hydrodynamic frictional drag reduction without …

A significant amount of the fuel consumed by marine vehicles is expended to overcome skin-
friction drag resulting from turbulent boundary layer flows. Hence, a substantial reduction in …

The mechanism of turbulent drag reduction (DR) with super-hydrophobic (SH) surfaces is
investigated by direct numerical simulation (DNS) and analysis of the governing equations …

In this review, we discuss how superhydrophobic surfaces (SHSs) can provide friction drag
reduction in turbulent flow. Whereas biomimetic SHSs are known to reduce drag in laminar …

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 …

Digital holographic microscopy is used for characterizing the profiles of mean velocity,
viscous and Reynolds shear stresses, as well as turbulence level in the inner part of …

The effect of spanwise wavelength of surface heterogeneity on turbulent secondary flows Page
1 J. Fluid Mech. (2020), vol. 894, A7. c The Author(s), 2020. Published by Cambridge University …

A nonintrusive data assimilation methodology is developed to improve the statistical
predictions of large-eddy simulations (LES). The ensemble-variational (EnVar) approach …