Physical Review E

Subscribe to Physical Review E feed
Recently published articles in Phys. Rev. E in the Table of Content section "Fluid dynamics"
Updated: 11 hours 48 min ago

Wave packets in the anomalous Ostrovsky equation

Thu, 10/17/2019 - 11:00

Author(s): E. R. Johnson

The anomalous Ostrovsky equation, which describes waves in vertically sheared ocean flows and magnetoacoustic waves, possesses steadily propagating, finite-amplitude, localized wave-packet solutions. It is shown here that these solutions can be obtained asymptotically, using Whitham modulation theor...

[Phys. Rev. E 100, 043109] Published Thu Oct 17, 2019

Statistics of Lagrangian trajectories in a rotating turbulent flow

Thu, 10/17/2019 - 11:00

Author(s): Priyanka Maity, Rama Govindarajan, and Samriddhi Sankar Ray

We investigate the Lagrangian statistics of three-dimensional rotating turbulent flows through direct numerical simulations. We find that the emergence of coherent vortical structures because of the Coriolis force leads to a suppression of the “flight-crash” events reported by Xu et al. [Proc. Natl....

[Phys. Rev. E 100, 043110] Published Thu Oct 17, 2019

Transport phenomena in the Knudsen layer near an evaporating surface

Wed, 10/16/2019 - 11:00

Author(s): Eric Bird and Zhi Liang

Using the combination of the kinetic theory of gases (KTG), Boltzmann transport equation (BTE), and molecular dynamics (MD) simulations, we study the transport phenomena in the Knudsen layer near a planar evaporating surface. The MD simulation is first used to validate the assumption regarding the a...

[Phys. Rev. E 100, 043108] Published Wed Oct 16, 2019

Information production in homogeneous isotropic turbulence

Mon, 10/14/2019 - 11:00

Author(s): Arjun Berera and Daniel Clark

We study the Reynolds number scaling of the Kolmogorov-Sinai entropy and attractor dimension for three-dimensional homogeneous isotropic turbulence through the use of direct numerical simulation. To do so, we obtain Lyapunov spectra for a range of different Reynolds numbers by following the divergen...

[Phys. Rev. E 100, 041101(R)] Published Mon Oct 14, 2019

Impact of an initial random magnetic field on the evolution of two-dimensional shearless mixing layers

Mon, 10/14/2019 - 11:00

Author(s): Mahzad Chitsaz and Mani Fathali

The impact of an initial random magnetic field on the temporal evolution of a two-dimensional incompressible turbulent shearless mixing layer is investigated using direct numerical simulation. Different intensities of the initial random magnetic field are imposed with uniform probability distributio...

[Phys. Rev. E 100, 043106] Published Mon Oct 14, 2019

Narrow escape problem for Brownian particles in a microsphere with internal circulation

Mon, 10/14/2019 - 11:00

Author(s): C. A. Klettner

This paper considers the narrow escape problem of a Brownian particle within a two-dimensional domain with two escape windows and an internal circulation modeled by the flow within a Hill's vortex. To account for the spatially inhomogeneous flow within the domain, a Lagrangian study is undertaken us...

[Phys. Rev. E 100, 043107] Published Mon Oct 14, 2019

Phase transition in time-reversible Navier-Stokes equations

Wed, 10/09/2019 - 11:00

Author(s): Vishwanath Shukla, Bérengère Dubrulle, Sergey Nazarenko, Giorgio Krstulovic, and Simon Thalabard

We present a comprehensive study of the statistical features of a three-dimensional (3D) time-reversible truncated Navier-Stokes (RNS) system, wherein the standard viscosity ν is replaced by a fluctuating thermostat that dynamically compensates for fluctuations in the total energy. We analyze the st...

[Phys. Rev. E 100, 043104] Published Wed Oct 09, 2019

Normal form of synchronization and resonance between vorticity waves in shear flow instability

Wed, 10/09/2019 - 11:00

Author(s): Eyal Heifetz and Anirban Guha

A minimal model of linearized two-dimensional shear instabilities can be formulated in terms of an action-at-a-distance, phase-locking resonance between two vorticity waves, which propagate counter to their local mean flow as well as counter to each other. Here we analyze the prototype of this inter...

[Phys. Rev. E 100, 043105] Published Wed Oct 09, 2019

Intermittent fluid connectivity during two-phase flow in a heterogeneous carbonate rock

Tue, 10/08/2019 - 11:00

Author(s): Catherine Spurin, Tom Bultreys, Branko Bijeljic, Martin J. Blunt, and Samuel Krevor

Subsurface fluid flow is ubiquitous in nature, and understanding the interaction of multiple fluids as they flow within a porous medium is central to many geological, environmental, and industrial processes. It is assumed that the flow pathways of each phase are invariant when modeling subsurface fl...

[Phys. Rev. E 100, 043103] Published Tue Oct 08, 2019

Toy model for vortex-ring-assisted particle drag in superfluid counterflow

Thu, 10/03/2019 - 11:00

Author(s): L. Moriconi

The interpretation of data obtained from particle image and tracking velocimetry in the study of superfluid flows has been so far a challenging task. Tracking particles (as solid hydrogen or deuterium) are attracted to the cores of quantized vortices, so that their dynamics can be strongly affected ...

[Phys. Rev. E 100, 043102] Published Thu Oct 03, 2019

Pore-scale velocities in three-dimensional porous materials with trapped immiscible fluid

Wed, 10/02/2019 - 11:00

Author(s): Gaël Raymond Guédon, Fabio Inzoli, Monica Riva, and Alberto Guadagnini

We study and document the influence of wetting and nonwetting trapped immiscible fluid on the probability distribution of pore-scale velocities of the flowing fluid phase. We focus on drainage and imbibition processes within a three-dimensional microcomputed tomographic image of a real rock sample. ...

[Phys. Rev. E 100, 043101] Published Wed Oct 02, 2019

Direct numerical simulation of vortex-induced instability for a zero-pressure-gradient boundary layer

Thu, 09/26/2019 - 11:00

Author(s): Aditi Sengupta, V. K. Suman, and Tapan K. Sengupta

Vortex-induced instability caused by a free-stream vortical excitation is explored here quantitatively with the help of controlled computational results. First, the computed results are compared with experimental results in Lim et al. [Exp. Fluids 37, 47 (2004)] for the purpose of validation of the ...

[Phys. Rev. E 100, 033118] Published Thu Sep 26, 2019

Nonaxisymmetric simulations of the Princeton magnetorotational instability experiment with insulating and conducting axial boundaries

Tue, 09/24/2019 - 11:00

Author(s): Dahan Choi, Fatima Ebrahimi, Kyle J. Caspary, Erik P. Gilson, Jeremy Goodman, and Hantao Ji

Stability and nonlinear evolution of rotating magnetohydrodynamic flows in the Princeton magnetorotational instability (MRI) experiment are examined using three-dimensional non-axisymmetric simulations. In particular, the effect of axial boundary conductivity on a free Stewartson-Shercliff layer (SS...

[Phys. Rev. E 100, 033116] Published Tue Sep 24, 2019

Kolmogorov or Bolgiano-Obukhov scaling: Universal energy spectra in stably stratified turbulent fluids

Tue, 09/24/2019 - 11:00

Author(s): Abhik Basu and Jayanta K. Bhattacharjee

We set up the scaling theory for stably stratified turbulent fluids. For a system having infinite extent in the horizontal directions, but with a finite width in the vertical direction, this theory predicts that the inertial range can display three possible scaling behavior, which are essentially pa...

[Phys. Rev. E 100, 033117] Published Tue Sep 24, 2019

Determination of the transmissivity of a heterogeneous anisotropic fracture in slip flow conditions

Mon, 09/23/2019 - 11:00

Author(s): Tony Zaouter, Didier Lasseux, and Marc Prat

Rough fractures often exhibit a broad spectrum of defect length scales ranging from the microscopic (roughness) scale to a macroscopic one (waviness) and further to the megascopic scale corresponding to the entire fracture. The influence of these multiple scales and their reciprocal interactions are...

[Phys. Rev. E 100, 033115] Published Mon Sep 23, 2019

Initial coalescence of a drop at a planar liquid surface

Fri, 09/20/2019 - 11:00

Author(s): Qindan Zhang, Xiaofeng Jiang, David Brunello, Taotao Fu, Chunying Zhu, Youguang Ma, and Huai Z. Li

The initial coalescence of a pendant drop at bulk liquid was jointly investigated by an ultrahigh-speed DC electrical device, a high-speed camera, and a fast micro-Particle Image Velocimetry (micro-PIV). Extended to highly viscous non-Newtonian liquids, the variation of the coalescing width vs time ...

[Phys. Rev. E 100, 033112] Published Fri Sep 20, 2019

Migration behaviors of leaky dielectric droplets with electric and hydrodynamic forces

Fri, 09/20/2019 - 11:00

Author(s): Yanning Wang, Dongliang Sun, Yinshi Li, Shuai Chen, and Bo Yu

The external electric field enables separation and transport of droplets effectively in microfluidic devices. Herein, a volume-of-fluid (VOF) + level-set (LS) + smoothed physical parameters (SPP) method associated with the dynamically adaptive grid technique is extended to simulate three-dimensional...

[Phys. Rev. E 100, 033113] Published Fri Sep 20, 2019

Self-propelled plate in wakes behind tandem cylinders

Fri, 09/20/2019 - 11:00

Author(s): Wenjiang Wang, Haibo Huang, and Xi-Yun Lu

Fish may take advantage of environmental vortices to save the cost of locomotion. The complex hydrodynamics shed from multiple physical objects may significantly affect fish refuging (holding stationary). Taking a model of a self-propelled flapping plate, we numerically studied the locomotion of the...

[Phys. Rev. E 100, 033114] Published Fri Sep 20, 2019

Numerical investigation of adhesion dynamics of a deformable cell pair on an adhesive substrate in shear flow

Thu, 09/19/2019 - 11:00

Author(s): Ziying Zhang, Jun Du, Zhengying Wei, Zhen Chen, Chang Shu, Zhen Wang, and Minghui Li

Adhesion dynamics of cells is of great value to biological systems and adhesion-based biomedical applications. Although adhesion of a single cell or capsule has been widely studied, physical insights into the adhesion dynamics of aggregates containing two or more cells remain elusive. In this paper,...

[Phys. Rev. E 100, 033111] Published Thu Sep 19, 2019

Origin of lobe and cleft at the gravity current front

Wed, 09/18/2019 - 11:00

Author(s): C. Y. Xie, J. J. Tao, and L. S. Zhang

In this Rapid Communication, the Rayleigh-Taylor instability (RTI) along the density interfaces of gravity current fronts is analyzed. Both the location and the spanwise wave number of the most unstable mode determined by the local dispersion relation agree with those of the strongest perturbation o...

[Phys. Rev. E 100, 031103(R)] Published Wed Sep 18, 2019