Physical Review E

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Recently published articles in Phys. Rev. E in the Table of Content section "Fluid dynamics"
Updated: 11 hours 28 min ago

Spatial analog of the two-frequency torus breakup in a nonlinear system of reactive miscible fluids

Wed, 09/18/2019 - 11:00

Author(s): Dmitry Bratsun

We present a theoretical study on pattern formation occurring in miscible fluids reacting by a second-order reaction A+B→C in a vertical Hele-Shaw cell under constant gravity. We have recently reported that the concentration-dependent diffusion of species coupled with a frontal neutralization reacti...

[Phys. Rev. E 100, 031104(R)] Published Wed Sep 18, 2019

Solidification of the Lennard-Jones fluid near a wall in thermohydrodynamic lubrication

Mon, 09/16/2019 - 11:00

Author(s): Kouki Nakamura, Ryo Ookawa, and Shugo Yasuda

We investigate the thermohydrodynamic lubrication of the Lennard-Jones (LJ) fluid in plain wall channels by using a molecular-dynamics simulation. It is found that the LJ fluid solidifies near the wall when the viscous heating of the LJ fluid in the bulk regime is sufficiently large. The thickness o...

[Phys. Rev. E 100, 033109] Published Mon Sep 16, 2019

Closed-loop adaptive control of extreme events in a turbulent flow

Mon, 09/16/2019 - 11:00

Author(s): Mohammad Farazmand and Themistoklis P. Sapsis

Extreme events that arise spontaneously in chaotic dynamical systems often have an adverse impact on the system or the surrounding environment. As such, their mitigation is highly desirable. Here, we introduce a control strategy for mitigating extreme events in a turbulent shear flow. The controller...

[Phys. Rev. E 100, 033110] Published Mon Sep 16, 2019

Reactive-infiltration instability in radial geometry: From dissolution fingers to star patterns

Fri, 09/13/2019 - 11:00

Author(s): Piotr Grodzki and Piotr Szymczak

We consider the process of chemical erosion of a porous medium infiltrated by a reactive fluid in a thin-front limit, in which the width of the reactive front is negligible with respect to the diffusive length. We show that in the radial geometry the advancing front becomes unstable only if the flow...

[Phys. Rev. E 100, 033108] Published Fri Sep 13, 2019

Origin of localized snakes-and-ladders solutions of plane Couette flow

Thu, 09/12/2019 - 11:00

Author(s): Matthew Salewski, John F. Gibson, and Tobias M. Schneider

Spatially localized invariant solutions of plane Couette flow are organized in a snakes-and-ladders structure strikingly similar to that observed for simpler pattern-forming partial differential equations [Schneider, Gibson, and Burke, Phys. Rev. Lett. 104, 104501 (2010)]. We demonstrate the mechani...

[Phys. Rev. E 100, 031102(R)] Published Thu Sep 12, 2019

Modes and break periods of electrowetting liquid bridge

Wed, 09/11/2019 - 11:00

Author(s): Mohsen Torabi, Ahmed A. Hemeda, James W. Palko, Yu Feng, Yong Cao, and Yanbao Ma

In this paper, we propose a microscale liquid oscillator using electrowetting-on-dielectric (EWOD). Specifically, a mesoscale liquid bridge (LB) between two horizontal surfaces with EWOD is considered. When EWOD is applied, the solid surface becomes more hydrophilic, and hence the contact angle (CA)...

[Phys. Rev. E 100, 033102] Published Wed Sep 11, 2019

Analytic solution for the zero-order postshock profiles when an incident planar shock hits a planar contact surface

Wed, 09/11/2019 - 11:00

Author(s): F. Cobos-Campos and J. G. Wouchuk

An explicit analytical solution to calculate the profiles after the shock collision with a planar contact surface is presented. The case when a shock is reflected after the incident shock refraction is considered. The goal of this work is to present explicit formulas to obtain the quantities behind ...

[Phys. Rev. E 100, 033107] Published Wed Sep 11, 2019

Acoustic microstreaming produced by nonspherical oscillations of a gas bubble. I. Case of modes 0 and $m$

Tue, 09/10/2019 - 11:00

Author(s): Alexander A. Doinikov, Sarah Cleve, Gabriel Regnault, Cyril Mauger, and Claude Inserra

A theory is developed that allows one to model the velocity field of acoustic microstreaming produced by nonspherical oscillations of an acoustically driven gas bubble. It is assumed that some of the bubble oscillation modes are excited parametrically and hence can oscillate at frequencies different...

[Phys. Rev. E 100, 033104] Published Tue Sep 10, 2019

Acoustic microstreaming produced by nonspherical oscillations of a gas bubble. II. Case of modes 1 and $m$

Tue, 09/10/2019 - 11:00

Author(s): Alexander A. Doinikov, Sarah Cleve, Gabriel Regnault, Cyril Mauger, and Claude Inserra

This paper continues a study that was started in our previous paper [A. A. Doinikov et al., Phys. Rev. E 100, 033104 (2019)]. The overall aim of the study is to develop a theory for modeling the velocity field of acoustic microstreaming produced by nonspherical oscillations of an acoustically driven...

[Phys. Rev. E 100, 033105] Published Tue Sep 10, 2019

Dynamics of groups of magnetically driven artificial microswimmers

Tue, 09/10/2019 - 11:00

Author(s): Jake Buzhardt and Phanindra Tallapragada

Magnetically driven artificial microswimmers have the potential to revolutionize many biomedical technologies, such as minimally invasive microsurgery, microparticle manipulation, and localized drug delivery. However, many of these applications will require the controlled dynamics of teams of these ...

[Phys. Rev. E 100, 033106] Published Tue Sep 10, 2019

Interfacial flows in sessile evaporating droplets of mineral water

Fri, 09/06/2019 - 11:00

Author(s): Massimiliano Rossi, Alvaro Marin, and Christian J. Kähler

Liquid flow in sessile evaporating droplets of ultrapure water typically results from two main contributions: a capillary flow pushing the liquid toward the contact line from the bulk and a thermal Marangoni flow pulling the drop free surface toward the summit. Current analytical and numerical model...

[Phys. Rev. E 100, 033103] Published Fri Sep 06, 2019

Aerodynamically stabilized Taylor cone jets

Tue, 09/03/2019 - 11:00

Author(s): F. Cruz-Mazo, M. O. Wiedorn, M. A. Herrada, S. Bajt, H. N. Chapman, and A. M. Gañán-Calvo

We introduce a way to stabilize steady micro/nanoliquid jets issuing from Taylor cones together with coflowing gas streams. We study the dripping-jetting transition of this configuration theoretically through a global stability analysis as a function of the governing parameters involved. A balance b...

[Phys. Rev. E 100, 031101(R)] Published Tue Sep 03, 2019

Confinement effect on electrically induced dynamics of a droplet in shear flow

Tue, 09/03/2019 - 11:00

Author(s): Somnath Santra, Shubhadeep Mandal, and Suman Chakraborty

Deformation and breakup of droplets in confined shear flows have been attracting increasing attention from the research community over the past few years, as attributable to their implications in microfluidics and emulsion processing. Reported results in this regard have demonstrated that the primar...

[Phys. Rev. E 100, 033101] Published Tue Sep 03, 2019

Entropy growth and entropy production rate in binary mixture shock waves

Fri, 08/30/2019 - 11:00

Author(s): Damir Madjarević and Srboljub Simić

Entropy growth and entropy production rate are analyzed in the stationary shock waves in a multitemperature model of a binary mixture of gases. The model is developed within the framework of extended thermodynamics. It is shown that the entropy density of the mixture increases monotonically through ...

[Phys. Rev. E 100, 023119] Published Fri Aug 30, 2019

Computing exact coherent states in channels starting from the laminar profile: A resolvent-based approach

Wed, 08/28/2019 - 11:00

Author(s): Kevin Rosenberg and Beverley J. McKeon

We present an iterative method to compute traveling wave exact coherent states (ECS) in Couette and Poiseuille flows starting from an initial laminar profile. The approach utilizes the resolvent operator for a two-dimensional, three-component streamwise-averaged mean and exploits the underlying phys...

[Phys. Rev. E 100, 021101(R)] Published Wed Aug 28, 2019

Periodic solutions and chaos in the Barkley pipe model on a finite domain

Wed, 08/28/2019 - 11:00

Author(s): K. Y. Short

Barkley's bipartite pipe model is a continuous two-state reaction-diffusion system that models the transition to turbulence in pipes, and reproduces many qualitative features of puffs and slugs, localized turbulent structures seen during the transition. Extensions to the continuous model, including ...

[Phys. Rev. E 100, 023116] Published Wed Aug 28, 2019

Taylor-vortex flow in shear-thinning fluids

Wed, 08/28/2019 - 11:00

Author(s): S. Topayev, C. Nouar, D. Bernardin, A. Neveu, and S. A. Bahrani

This paper deals with the Taylor-Couette flow of shear-thinning fluids. It focuses on the first principles understanding of the influence of the viscosity stratification and the nonlinear variation of the effective viscosity μ with the shear rate γ̇ on the flow structure in the Taylor-vortex flow re...

[Phys. Rev. E 100, 023117] Published Wed Aug 28, 2019

Exact solutions for shock waves in dilute gases

Wed, 08/28/2019 - 11:00

Author(s): F. J. Uribe and R. M. Velasco

In 1922 Becker found an exact solution for shock waves in gases using the Navier–Stokes–Fourier constitutive equations for a Prandtl number of value 3/4 with constant transport coefficients. His analysis has been extended to study some cases where an implicit solution can be found in an exact way. I...

[Phys. Rev. E 100, 023118] Published Wed Aug 28, 2019

Haines jumps: Pore scale mechanisms

Tue, 08/27/2019 - 11:00

Author(s): Zhonghao Sun and J. Carlos Santamarina

Sudden changes in pressure and fluid distribution are often observed in porous systems, and this work proposes and tests a physical model to explain this phenomenon. The analysis enables the authors to predict effects of various factors on the occurrence of such jumps, which are termed Haines instabilities.

[Phys. Rev. E 100, 023115] Published Tue Aug 27, 2019

Electric fields enable tunable surfactant transport to microscale fluid interfaces

Fri, 08/23/2019 - 11:00

Author(s): Rajarshi Sengupta, Aditya S. Khair, and Lynn M. Walker

The transport dynamics of oil-soluble surfactants to oil-water interfaces are quantified using a custom-built electrified capillary microtensiometer platform. Dynamic interfacial tension measurements reveal that surfactant transport is enhanced under a dc electric field, due to electro-migration of ...

[Phys. Rev. E 100, 023114] Published Fri Aug 23, 2019