Physical Review E

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Recently published articles in Phys. Rev. E in the Table of Content section "Fluid dynamics"
Updated: 21 hours 32 min ago

Large-scale motions from a direct numerical simulation of a turbulent boundary layer

Tue, 09/04/2018 - 11:00

Author(s): Ilkay Solak and Jean-Philippe Laval

A study of large-scale motions from a direct numerical simulation database of the turbulent boundary layer up to Reθ∼2500 is presented. The statistics of large-scale streamwise structures have been investigated using two-dimensional and three-dimensional (3D) extraction procedures. The large-scale s...

[Phys. Rev. E 98, 033101] Published Tue Sep 04, 2018

Effects of viscosity and elasticity on the Richtmyer-Meshkov instability

Tue, 09/04/2018 - 11:00

Author(s): Y. B. Sun, J. J. Tao, R. H. Zeng, and X. T. He

The impulsively accelerated Richtmyer-Meshkov instability (RMI) of a fluid-solid interface is theoretically studied with a decomposition method, and the least stable mode is shown to oscillate but decay due to the combined effects of elasticity and viscosity. The dispersion relation of RMI in viscou...

[Phys. Rev. E 98, 033102] Published Tue Sep 04, 2018

Enhanced slip properties of lubricant-infused grooves

Tue, 09/04/2018 - 11:00

Author(s): Evgeny S. Asmolov, Tatiana V. Nizkaya, and Olga I. Vinogradova

We ascertain the enhanced slip properties for a liquid flow over lubricant-infused unidirectional surfaces. This situation reflects many practical settings involving liquid flows past superhydrophobic grooves filled with gas, or past grooves infused with another, immiscible, liquid of smaller or equ...

[Phys. Rev. E 98, 033103] Published Tue Sep 04, 2018

Machine-learning inference of fluid variables from data using reservoir computing

Fri, 08/31/2018 - 11:00

Author(s): Kengo Nakai and Yoshitaka Saiki

We infer both microscopic and macroscopic behaviors of a three-dimensional chaotic fluid flow using reservoir computing. In our procedure of the inference, we assume no prior knowledge of a physical process of a fluid flow except that its behavior is complex but deterministic. We present two ways of...

[Phys. Rev. E 98, 023111] Published Fri Aug 31, 2018

Reversals in infinite-Prandtl-number Rayleigh-Bénard convection

Wed, 08/29/2018 - 11:00

Author(s): Ambrish Pandey, Mahendra K. Verma, and Mustansir Barma

Using direct numerical simulations, we study the statistical properties of reversals in two-dimensional Rayleigh-Bénard convection for infinite Prandtl number. We find that the large-scale circulation reverses irregularly, with the waiting time between two consecutive genuine reversals exhibiting a ...

[Phys. Rev. E 98, 023109] Published Wed Aug 29, 2018

Collapse of generalized Euler and surface quasigeostrophic point vortices

Wed, 08/29/2018 - 11:00

Author(s): Gualtiero Badin and Anna M. Barry

Point-vortex models are presented for the generalized Euler equations, which are characterized by a fractional Laplacian relation between the active scalar and the stream function. Special focus is given to the case of the surface quasigeostrophic (SQG) equations, for which the existence of finite-t...

[Phys. Rev. E 98, 023110] Published Wed Aug 29, 2018

Passive swimming of a microcapsule in vertical fluid oscillation

Mon, 08/27/2018 - 11:00

Author(s): Takeru Morita, Toshihiro Omori, and Takuji Ishikawa

The artificial microswimmer is a cutting-edge technology with applications in drug delivery and micro-total-analysis systems. The flow field around a microswimmer can be regarded as Stokes flow, in which reciprocal body deformation cannot induce migration. In this study, we propose a microcapsule sw...

[Phys. Rev. E 98, 023108] Published Mon Aug 27, 2018

Tumbling dynamics of inertial inextensible chains in extensional flow

Fri, 08/24/2018 - 11:00

Author(s): Christophe Henry, Giorgio Krstulovic, and Jérémie Bec

This paper investigates the effect of inertia on the dynamics of elongated chains to go beyond the overdamped case that is often used to study such systems. For that purpose, numerical simulations are performed considering the motion of freely jointed bead-rod chains in an extensional flow in the pr...

[Phys. Rev. E 98, 023107] Published Fri Aug 24, 2018