Physical Review E

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Recently published articles in Phys. Rev. E in the Table of Content section "Fluid dynamics"
Updated: 1 day 23 hours ago

Numerical study of two disks settling in an Oldroyd-B fluid: From periodic interaction to chaining

Mon, 12/04/2017 - 10:00

Author(s): Tsorng-Whay Pan and Roland Glowinski

In this article, we present a numerical study of the dynamics of two disks sedimenting in a narrow vertical channel filled with an Oldroyd-B fluid. Two kinds of particle dynamics are observed: (i) a periodic interaction between the two disks, and (ii) the formation of a two-disk chain. For the perio...

[Phys. Rev. E 96, 063103] Published Mon Dec 04, 2017

Observation of structural universality in disordered systems using bulk diffusion measurement

Fri, 12/01/2017 - 10:00

Author(s): Antonios Papaioannou, Dmitry S. Novikov, Els Fieremans, and Gregory S. Boutis

We report on an experimental observation of classical diffusion distinguishing between structural universality classes of disordered systems in one dimension. Samples of hyperuniform and short-range disorder were designed, characterized by the statistics of the placement of micrometer-thin parallel ...

[Phys. Rev. E 96, 061101(R)] Published Fri Dec 01, 2017

Logarithmic scaling for fluctuations of a scalar concentration in wall turbulence

Fri, 12/01/2017 - 10:00

Author(s): Hideaki Mouri, Takeshi Morinaga, Toshimasa Yagi, and Kazuyasu Mori

Within wall turbulence, there is a sublayer where the mean velocity and the variance of velocity fluctuations vary logarithmically with the height from the wall. This logarithmic scaling is also known for the mean concentration of a passive scalar. By using heat as such a scalar in a laboratory expe...

[Phys. Rev. E 96, 063101] Published Fri Dec 01, 2017

Cooling beyond the boundary value in supercritical fluids under vibration

Fri, 12/01/2017 - 10:00

Author(s): D. Sharma, A. Erriguible, and S. Amiroudine

Supercritical fluids when subjected to simultaneous quench and vibration have been known to cause various intriguing flow phenomena and instabilities depending on the relative direction of temperature gradient and vibration. Here we describe a surprising and interesting phenomenon wherein temperatur...

[Phys. Rev. E 96, 063102] Published Fri Dec 01, 2017

Exact relations for energy transfer in self-gravitating isothermal turbulence

Thu, 11/30/2017 - 10:00

Author(s): Supratik Banerjee and Alexei G. Kritsuk

Self-gravitating isothermal supersonic turbulence is analyzed in the asymptotic limit of large Reynolds numbers. Based on the inviscid invariance of total energy, an exact relation is derived for homogeneous (not necessarily isotropic) turbulence. A modified definition for the two-point energy corre...

[Phys. Rev. E 96, 053116] Published Thu Nov 30, 2017

Deceleration of one-dimensional mixing by discontinuous mappings

Mon, 11/27/2017 - 10:00

Author(s): Hannah Kreczak, Rob Sturman, and Mark C. T. Wilson

We present a computational study of a simple one-dimensional map with dynamics composed of stretching, permutations of equally sized cells, and diffusion. We observe that the combination of the aforementioned dynamics results in eigenmodes with long-time exponential decay rates. The decay rate of th...

[Phys. Rev. E 96, 053112] Published Mon Nov 27, 2017

Kinetic-contact-driven gigantic energy transfer in a two-dimensional Lennard-Jones fluid confined to a rotating pore

Mon, 11/27/2017 - 10:00

Author(s): Paweł Karbowniczek and Agnieszka Chrzanowska

A two-dimensional Lennard-Jones system in a circular and rotating container has been studied by means of molecular dynamics technique. A nonequilibrium transition to the rotating stage has been detected in a delayed time since an instant switching of the frame rotation. This transition is attributed...

[Phys. Rev. E 96, 053113] Published Mon Nov 27, 2017

Role of red cells and plasma composition on blood sessile droplet evaporation

Mon, 11/27/2017 - 10:00

Author(s): Luca Lanotte, Didier Laux, Benoît Charlot, and Manouk Abkarian

The morphology of dried blood droplets derives from the deposition of red cells, the main components of their solute phase. Up to now, evaporation-induced convective flows were supposed to be at the base of red cell distribution in blood samples. Here, we present a direct visualization by videomicro...

[Phys. Rev. E 96, 053114] Published Mon Nov 27, 2017

Nonlinear and subharmonic stability analysis in film-driven morphological patterns

Mon, 11/27/2017 - 10:00

Author(s): Matteo Bernard Bertagni and Carlo Camporeale

The interaction of a gravity-driven water film with an evolving solid substrate (calcite or ice) results in the formation of fascinating wavy patterns similar both in caves and in ice-falls. Due to their remarkable similarity, we adopt a unified approach in the study of pattern formation of longitud...

[Phys. Rev. E 96, 053115] Published Mon Nov 27, 2017

Turbulent diffusion of chemically reacting flows: Theory and numerical simulations

Wed, 11/22/2017 - 10:00

Author(s): T. Elperin, N. Kleeorin, M. Liberman, A. N. Lipatnikov, I. Rogachevskii, and R. Yu

The theory of turbulent diffusion of chemically reacting gaseous admixtures developed previously [T. Elperin et al., Phys. Rev. E 90, 053001 (2014)] is generalized for large yet finite Reynolds numbers and the dependence of turbulent diffusion coefficient on two parameters, the Reynolds number and ...

[Phys. Rev. E 96, 053111] Published Wed Nov 22, 2017

Front propagation in a regular vortex lattice: Dependence on the vortex structure

Mon, 11/20/2017 - 10:00

Author(s): E. Beauvier, S. Bodea, and A. Pocheau

We investigate the dependence on the vortex structure of the propagation of fronts in stirred flows. For this, we consider a regular set of vortices whose structure is changed by varying both their boundary conditions and their aspect ratios. These configurations are investigated experimentally in a...

[Phys. Rev. E 96, 053109] Published Mon Nov 20, 2017

Marangoni effect on small-amplitude capillary waves in viscous fluids

Mon, 11/20/2017 - 10:00

Author(s): Li Shen, Fabian Denner, Neal Morgan, Berend van Wachem, and Daniele Dini

We derive a general integro-differential equation for the transient behavior of small-amplitude capillary waves on the planar surface of a viscous fluid in the presence of the Marangoni effect. The equation is solved for an insoluble surfactant solution in concentration below the critical micelle co...

[Phys. Rev. E 96, 053110] Published Mon Nov 20, 2017

Carpet cloak for water waves

Mon, 11/13/2017 - 10:00

Author(s): Zhenyu Wang, Chunyang Li, Razafizana Zatianina, Pei Zhang, and Yongqiang Zhang

Cloaking is a challenging topic in the field of wave motion, and is of significant theoretical value. In this article, a type of carpet cloak has been theoretically designed for water waves by using the effective medium and transformation theory. This carpet cloak device, created by a three-dimensio...

[Phys. Rev. E 96, 053107] Published Mon Nov 13, 2017

Emergence of chaos in a viscous solution of rods

Mon, 11/13/2017 - 10:00

Author(s): Emmanuel L. C. VI M. Plan, Stefano Musacchio, and Dario Vincenzi

It is shown that the addition of small amounts of microscopic rods in a viscous fluid at low Reynolds number causes a significant increase of the flow resistance. Numerical simulations of the dynamics of the solution reveal that this phenomenon is associated to a transition from laminar to chaotic f...

[Phys. Rev. E 96, 053108] Published Mon Nov 13, 2017

Nonhelical turbulence and the inverse transfer of energy: A parameter study

Fri, 11/10/2017 - 10:00

Author(s): Johannes Reppin and Robi Banerjee

We explore the phenomenon of the recently discovered inverse transfer of energy from small to large scales in decaying magnetohydrodynamical turbulence by Brandenburg et al. [Phys. Rev. Lett. 114, 075001 (2015)], even for nonhelical magnetic fields. For this investigation we mainly employ the Pencil...

[Phys. Rev. E 96, 053105] Published Fri Nov 10, 2017

Shock-wave-like structures induced by an exothermic neutralization reaction in miscible fluids

Fri, 11/10/2017 - 10:00

Author(s): Dmitry Bratsun, Alexey Mizev, Elena Mosheva, and Konstantin Kostarev

We report shock-wave-like structures that are strikingly different from previously observed fingering instabilities, which occur in a two-layer system of miscible fluids reacting by a second-order reaction A+B→S in a vertical Hele-Shaw cell. While the traditional analysis expects the occurrence of a...

[Phys. Rev. E 96, 053106] Published Fri Nov 10, 2017

Interaction of a planar reacting shock wave with an isotropic turbulent vorticity field

Thu, 11/09/2017 - 10:00

Author(s): César Huete, Tai Jin, Daniel Martínez-Ruiz, and Kun Luo

Linear interaction analysis (LIA) is employed to investigate the interaction of reactive and nonreactive shock waves with isotropic vortical turbulence. The analysis is carried out, through Laplace-transform technique, accounting for long-time effects of vortical disturbances on the burnt-gas flow i...

[Phys. Rev. E 96, 053104] Published Thu Nov 09, 2017

Instabilities of an annulus flow between rotating cylinders in a helical magnetic field

Mon, 11/06/2017 - 10:00

Author(s): Yurong Zhao, Jianjun Tao, and Xiangming Xiong

The stabilities of an annulus flow between the rotating inner and outer cylinders with an external helical magnetic field are studied by using the quasistatic approximation. It is shown numerically that for the spiral base flow with a zero axial pressure gradient, the helical magnetic field yields a...

[Phys. Rev. E 96, 053101] Published Mon Nov 06, 2017

Flow instabilities due to the interfacial formation of surfactant–fatty acid material in a Hele-Shaw cell

Mon, 11/06/2017 - 10:00

Author(s): Zahra Niroobakhsh, Matthew Litman, and Andrew Belmonte

We present an experimental study of pattern formation during the penetration of an aqueous surfactant solution into a liquid fatty acid in a Hele-Shaw cell. When a solution of the cationic surfactant cetylpyridinium chloride is injected into oleic acid, a wide variety of fingering patterns are obser...

[Phys. Rev. E 96, 053102] Published Mon Nov 06, 2017

Numerical design of a T-shaped microfluidic device for deformability-based separation of elastic capsules and soft beads

Mon, 11/06/2017 - 10:00

Author(s): M. M. Villone, M. Trofa, M. A. Hulsen, and P. L. Maffettone

We propose a square cross-section microfluidic channel with an orthogonal side branch (asymmetric T-shaped bifurcation) for the separation of elastic capsules and soft beads suspended in a Newtonian liquid on the basis of their mechanical properties. The design is performed through three-dimensional...

[Phys. Rev. E 96, 053103] Published Mon Nov 06, 2017