Physical Review E

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Recently published articles in Phys. Rev. E in the Table of Content section "Fluid dynamics"
Updated: 17 hours 24 min ago

Experimental lateral wall boundary layer behavior of a differentially rotating split-cylinder flow

Tue, 02/19/2019 - 10:00

Author(s): J. O. Rodríguez-García and J. Burguete

The cylindrical wall boundary layer of a closed cylinder split in two halves at the equator is studied experimentally. When these two parts rotate in exact corotation the internal flow is essentially in solid-body rotation at the angular velocity of both halves. When a slight difference between the ...

[Phys. Rev. E 99, 023111] Published Tue Feb 19, 2019

Dynamics of bubble-bubble interactions experiencing viscoelastic drag

Thu, 02/14/2019 - 10:00

Author(s): Ekaterina Zilonova, Maxim Solovchuk, and T. W. H. Sheu

The subject of the present theoretical study is the dynamics of bubble-bubble interactions in a viscoelastic medium. First, new equations for calculating the viscoelastic drag exerted on bubbles during their translational motion in a viscoelastic medium are derived. The drag equations are incorporat...

[Phys. Rev. E 99, 023109] Published Thu Feb 14, 2019

Rotating polygonal depression soliton clusters on the inner surface of a liquid ring

Thu, 02/14/2019 - 10:00

Author(s): Hamid Ait Abderrahmane, Pooya Soltanian Sedeh, Hoi Dick Ng, and Georgios H. Vatistas

We report an experimental observation of rotating depression soliton sets on the inner surface of a viscous liquid ring, carrying background waves. These occur within a rotating shallow layer of oil inside a stationary cylindrical container. The solitons are organized either in single, two, or regul...

[Phys. Rev. E 99, 023110] Published Thu Feb 14, 2019

Turbulence and jet-driven zonal flows: Secondary circulation in rotating fluids due to asymmetric forcing

Tue, 02/12/2019 - 10:00

Author(s): M. J. Burin, K. J. Caspary, E. M. Edlund, R. Ezeta, E. P. Gilson, H. Ji, M. McNulty, J. Squire, and G. R. Tynan

We report on experiments and modeling on a rotating confined liquid that is forced by circumferential jets coaxial with the rotation axis, wherein system-scale secondary flows are observed to emerge. The jets are evenly divided in number between inlets and outlets and have zero net mass transport. F...

[Phys. Rev. E 99, 023108] Published Tue Feb 12, 2019

Minimum enstrophy principle for two-dimensional inviscid flows around obstacles

Mon, 02/11/2019 - 10:00

Author(s): F. Muller, A. Burbeau, B.-J. Gréa, and P. Sagaut

Large-scale coherent structures emerging in two-dimensional flows can be predicted from statistical physics inspired methods consisting in minimizing the global enstrophy while conserving the total energy and circulation in the Euler equations. In many situations, solid obstacles inside the domain m...

[Phys. Rev. E 99, 023105] Published Mon Feb 11, 2019

$1/f$ noise and long-term memory of coherent structures in a turbulent shear flow

Mon, 02/11/2019 - 10:00

Author(s): M. Pereira, C. Gissinger, and S. Fauve

A shear flow of liquid metal (Galinstan) is driven in an annular channel by counter-rotating traveling magnetic fields imposed at the end caps. When the traveling velocities are large, the flow is turbulent and its azimuthal component displays random reversals. Power spectra of the velocity field ex...

[Phys. Rev. E 99, 023106] Published Mon Feb 11, 2019

Shape oscillations of a nonspherical water droplet

Mon, 02/11/2019 - 10:00

Author(s): Mounika Balla, Manoj Kumar Tripathi, and Kirti Chandra Sahu

The dynamics of a nonspherical droplet falling in air is investigated via three-dimensional numerical simulations of the Navier-Stokes and continuity equations. The main focus of this work is to study the effects of the relative influence of surface tension force over the inertial force and the orie...

[Phys. Rev. E 99, 023107] Published Mon Feb 11, 2019

Fluid flow through packings of elastic shells

Fri, 02/08/2019 - 10:00

Author(s): Pawel Gniewek and Oskar Hallatschek

Fluid transport in porous materials is commonly studied in geological samples (soil, sediments, etc.) or idealized systems, but the fluid flow through compacted granular materials, consisting of substantially strained granules, remains relatively unexplored. As a step toward filling this gap, we stu...

[Phys. Rev. E 99, 023103] Published Fri Feb 08, 2019

Bacterial detachment from a wall with a bump line

Fri, 02/08/2019 - 10:00

Author(s): Jinyou Yang, Yuji Shimogonya, and Takuji Ishikawa

The interactions of bacteria with surfaces have important implications in numerous areas of research, such as bioenergy, biofilm, biofouling, and infection. Recently, several experimental studies have reported that the adhesion of bacteria can be reduced considerably by microscale wall features. To ...

[Phys. Rev. E 99, 023104] Published Fri Feb 08, 2019

Dynamic characteristics of a deformable capsule in a simple shear flow

Thu, 02/07/2019 - 10:00

Author(s): Jingtao Ma, Lincheng Xu, Fang-Bao Tian, John Young, and Joseph C. S. Lai

The dynamic characteristics of a two-dimensional deformable capsule in a simple shear flow are studied with an immersed boundary-lattice Boltzmann method. Simulations are conducted by varying the Reynolds number (Re) from 0.0125 to 2000 and the dimensionless shear rate (G) from 0.001 to 0.5. The G-R...

[Phys. Rev. E 99, 023101] Published Thu Feb 07, 2019

Cancellation exponents in isotropic turbulence and magnetohydrodynamic turbulence

Thu, 02/07/2019 - 10:00

Author(s): X. M. Zhai, K. R. Sreenivasan, and P. K. Yeung

Small-scale characteristics of turbulence such as velocity gradients and vorticity fluctuate rapidly in magnitude and oscillate in sign. Much work exists on the characterization of magnitude variations, but far less on sign oscillations. While in homogeneous turbulence averages performed on large sc...

[Phys. Rev. E 99, 023102] Published Thu Feb 07, 2019

Relative importance of initial conditions on outflows from multiple fans

Wed, 01/30/2019 - 10:00

Author(s): K. Takamure and S. Ozono

Generation of homogeneous isotropic turbulence was attempted using an innovative “multifan wind tunnel” with 99 fans installed. The driving method used is based on a principle that the shear layers generated between outflows from the adjacent ducts lead to turbulent flow downstream. First, a signal ...

[Phys. Rev. E 99, 013112] Published Wed Jan 30, 2019

Dynamics of bidensity particle suspensions in a horizontal rotating cylinder

Tue, 01/29/2019 - 10:00

Author(s): Sudarshan Konidena, K. Anki Reddy, and Anugrah Singh

We report Stokesian dynamics simulations of bidensity suspensions rotating in a horizontal cylinder. We studied the phase space and radial and axial patterns in settling as well as floating systems. Each system was composed of particle mixtures of two different densities. As many as eight unique pha...

[Phys. Rev. E 99, 013111] Published Tue Jan 29, 2019

Characterizing the impact of particle behavior at fracture intersections in three-dimensional discrete fracture networks

Fri, 01/25/2019 - 10:00

Author(s): Thomas Sherman, Jeffrey D. Hyman, Diogo Bolster, Nataliia Makedonska, and Gowri Srinivasan

We characterize the influence of different intersection mixing rules for particle tracking simulations on transport properties through three-dimensional discrete fracture networks. It is too computationally burdensome to explicitly resolve all fluid dynamics within a large three-dimensional fracture...

[Phys. Rev. E 99, 013110] Published Fri Jan 25, 2019

Multiple eigenmodes of the Rayleigh-Taylor instability observed for a fluid interface with smoothly varying density. II. Asymptotic solution and its interpretation

Thu, 01/24/2019 - 10:00

Author(s): Ming Dong, Zhengfeng Fan, and Chengxin Yu

It was observed in the first part of this work [C. X. Yu et al., Phys. Rev. E 97, 013102 (2018)] that a Rayleigh-Taylor flow with a smoothly varying density at the interface permits a multiplicity of solutions for instability modes. Based on numerical solutions of the eigenvalue problem, a fitting ...

[Phys. Rev. E 99, 013109] Published Thu Jan 24, 2019

Elusive transition to the ultimate regime of turbulent Rayleigh-Bénard convection

Wed, 01/23/2019 - 10:00

Author(s): P. Urban, P. Hanzelka, T. Králík, M. Macek, V. Musilová, and L. Skrbek

By using cryogenic He4 gas as the working fluid in a cylindrical cell 0.3 m in both height and diameter, we study the influence of non-Oberbeck-Boussinesq (NOB) effects on the heat transfer in turbulent Rayleigh-Bénard convection (RBC). We show that the NOB effects increase the heat transfer efficie...

[Phys. Rev. E 99, 011101(R)] Published Wed Jan 23, 2019

Robustness of heat transfer in confined inclined convection at high Prandtl number

Tue, 01/22/2019 - 10:00

Author(s): Linfeng Jiang, Chao Sun, and Enrico Calzavarini

We investigate the dependency of the magnitude of heat transfer in a convection cell as a function of its inclination by means of experiments and simulations. The study is performed with a working fluid of large Prandtl number, Pr≃480, and at Rayleigh numbers Ra≃108 and Ra≃5×108 in a quasi-two-dimen...

[Phys. Rev. E 99, 013108] Published Tue Jan 22, 2019

Self-consistent feedback mechanism for the sudden viscous dissipation of finite-Mach-number compressing turbulence

Thu, 01/17/2019 - 10:00

Author(s): Alejandro Campos and Brandon E. Morgan

Previous work [Davidovits and Fisch, Phys. Rev. Lett. 116, 105004 (2016)] demonstrated that the compression of a turbulent field can lead to a sudden viscous dissipation of turbulent kinetic energy (TKE), and that paper suggested this mechanism could potentially be used to design new fast-ignition s...

[Phys. Rev. E 99, 013107] Published Thu Jan 17, 2019

Microscopic determination of macroscopic boundary conditions in Newtonian liquids

Mon, 01/14/2019 - 10:00

Author(s): Hiroyoshi Nakano and Shin-ichi Sasa

We study boundary conditions applied to the macroscopic dynamics of Newtonian liquids from the view of microscopic particle systems. We assume the existence of microscopic boundary conditions that are uniquely determined from a microscopic description of the fluid and the wall. By using molecular dy...

[Phys. Rev. E 99, 013106] Published Mon Jan 14, 2019

Stability analysis for a thermodynamically consistent model of relativistic fluid dynamics

Thu, 01/10/2019 - 10:00

Author(s): Laura Stricker and Hans Christian Öttinger

In relativistic fluid mechanics, positive entropy production is known to be insufficient for guaranteeing stability. Much stronger criteria for thermodynamic admissibility have become available in nonequilibrium thermodynamics. We here perform a linear stability analysis for a model of relativistic ...

[Phys. Rev. E 99, 013105] Published Thu Jan 10, 2019