Physical Review E

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Recently published articles in Phys. Rev. E in the Table of Content section "Fluid dynamics"
Updated: 6 hours 21 min ago

Relative velocities in bidisperse turbulent aerosols: Simulations and theory

Thu, 12/13/2018 - 10:00

Author(s): Akshay Bhatnagar, K. Gustavsson, B. Mehlig, and Dhrubaditya Mitra

We perform direct numerical simulations of a bidisperse suspension of heavy spherical particles in forced, homogeneous, and isotropic three-dimensional turbulence. We compute the joint distribution of relative particle distances and longitudinal relative velocities between particles of different ine...

[Phys. Rev. E 98, 063107] Published Thu Dec 13, 2018

Role of symmetry in driven propulsion at low Reynolds number

Wed, 12/12/2018 - 10:00

Author(s): Johannes Sachs, Konstantin I. Morozov, Oded Kenneth, Tian Qiu, Nico Segreto, Peer Fischer, and Alexander M. Leshansky

We theoretically and experimentally investigate low-Reynolds-number propulsion of geometrically achiral planar objects that possess a dipole moment and that are driven by a rotating magnetic field. Symmetry considerations (involving parity P̂ and charge conjugation Ĉ) establish correspondence betwe...

[Phys. Rev. E 98, 063105] Published Wed Dec 12, 2018

Experimental modulation and theoretical simulation of zonal oscillation for electrostatically levitated metallic droplets at high temperatures

Wed, 12/12/2018 - 10:00

Author(s): H. P. Wang, M. X. Li, P. F. Zou, X. Cai, L. Hu, and B. Wei

The second- and third-order zonal oscillations of metallic droplets at high temperatures beyond 2000 K were experimentally achieved by electrostatic levitation. To quantitatively describe the suspension stability of different metallic droplets, a stability factor model was proposed as a function of ...

[Phys. Rev. E 98, 063106] Published Wed Dec 12, 2018

Nonequilibrium solid-solid phase transition in a lattice of liquid jets

Tue, 12/11/2018 - 10:00

Author(s): Fabrizio Croccolo, Stefano Castellini, Frank Scheffold, and Alberto Vailati

Solid-solid phase transitions are commonly encountered at the atomic scale in alloys and in superatomic mesoscopic systems of colloidal particles. Here we investigate a solid-solid phase transition occurring at the macroscopic scale between lattices of liquid jets with different symmetries generated...

[Phys. Rev. E 98, 063104] Published Tue Dec 11, 2018

Electromagnetic field orientation and characteristics governed hydrodynamics within pendent droplets

Mon, 12/10/2018 - 10:00

Author(s): Purbarun Dhar, Vivek Jaiswal, and A. R. Harikrishnan

This article reports the dominant governing role played by the direction of electric and magnetic fields on the internal advection pattern and strength within salt solution pendent droplets. The literature shows that solutal advection drives circulation cells within salt based droplets, even in the ...

[Phys. Rev. E 98, 063103] Published Mon Dec 10, 2018

Biaxial fluid oscillations can propel a microcapsule swimmer in an arbitrary direction

Fri, 12/07/2018 - 10:00

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

Due to their potential usefulness in engineering and medical applications, various artificial microswimmers have been proposed. In our previous paper et al. [T. Morita, T. Omori, and T. Ishikawa, Phys. Rev. E 98, 023108 (2018)], we introduced a microcapsule swimmer that underwent amoeboidlike shape ...

[Phys. Rev. E 98, 063102] Published Fri Dec 07, 2018

Hyperuniform flow fields resulting from hyperuniform configurations of circular disks

Wed, 12/05/2018 - 10:00

Author(s): Zhenya Ding, Yu Zheng, Yaopengxiao Xu, Yang Jiao, and Wei Li

Motivated by cancer cell capture and sorting applications, we investigate the scalar velocity field of two-dimensional (2D) laminar flows through configurations of fixed congruent circular disks with a disordered hyperuniform (HU) distribution of the disk centers. Disordered HU many-particle systems...

[Phys. Rev. E 98, 063101] Published Wed Dec 05, 2018

Impact of clogging on the transfer dynamics of hydraulic networks

Tue, 11/27/2018 - 10:00

Author(s): D. S. Griffani, P. Rognon, and I. Einav

We investigate how clogging affects the transfer properties of a generic class of materials featuring a hydraulic network embedded in a matrix. We consider the flow of a liquid through fully saturated hydraulic networks which transfer heat (or mass) by advection and diffusion, and a matrix in which ...

[Phys. Rev. E 98, 053107] Published Tue Nov 27, 2018

Negative acoustic radiation force induced on an elastic sphere by laser irradiation

Mon, 11/26/2018 - 10:00

Author(s): Hai-Qun Yu, Jie Yao, Da-Jian Wu, Xue-Wei Wu, and Xiao-Jun Liu

We propose an alternative strategy to modulate the acoustic radiation force (ARF) acting on an elastic sphere (ES) using laser irradiation. A mathematical model of the interaction of the acoustic plane wave with the laser-irradiated ES is developed to calculate the ARF acting on the ES. It is demons...

[Phys. Rev. E 98, 053105] Published Mon Nov 26, 2018

Three-dimensional transition of zero-pressure-gradient boundary layer by impulsively and nonimpulsively started harmonic wall excitation

Mon, 11/26/2018 - 10:00

Author(s): Pushpender Sharma, Tapan K. Sengupta, and Swagata Bhaumik

A three-dimensional (3D) transition route for zero-pressure-gradient boundary layer over a flat plate is computationally investigated, for impulsive and nonimpulsive startup of harmonic wall excitation. A monochromatic frequency of excitation is chosen to perturb the boundary layer. The exciter plac...

[Phys. Rev. E 98, 053106] Published Mon Nov 26, 2018

Front evaporation effects on wicking in two- and three-dimensional porous domains

Fri, 11/16/2018 - 10:00

Author(s): Eric M. Benner and Dimiter N. Petsev

We present the equations for wicking in two- and three-dimensional porous media when liquid is evaporating through the wet front using the Green–Ampt saturated capillary flow model in polar and spherical geometries. The time-dependent behavior of two-dimensional wicking influenced by front interface...

[Phys. Rev. E 98, 053104] Published Fri Nov 16, 2018

Particle velocity distributions and velocity fluctuations of non-Brownian settling particles by particle-resolved direct numerical simulation

Fri, 11/09/2018 - 10:00

Author(s): Ali Abbas Zaidi

Settling dynamics of non-Brownian particles is investigated using particle-resolved direct numerical simulations. There are two aims of this paper: first is to study the variation of particle velocity fluctuations with solid volume for a wide range of settling Reynolds number; second is to investiga...

[Phys. Rev. E 98, 053103] Published Fri Nov 09, 2018

Axial and radial patterns of a bidispersed suspension in a fully filled horizontal rotating cylinder

Tue, 11/06/2018 - 10:00

Author(s): John C. Nasaba and Anugrah Singh

We report on the pattern formation in a horizontal rotating cylinder fully filled with bidispersed suspension composed of non-Brownian settling and floating particles. The effect of particle mixing of different buoyancy and shape on the axial and radial pattern formation was investigated using flow ...

[Phys. Rev. E 98, 053102] Published Tue Nov 06, 2018

Counterion flow through a deformable and charged nanochannel

Thu, 11/01/2018 - 10:00

Author(s): Mpumelelo Matse, Peter Berg, and Michael Eikerling

A theoretical model is developed that describes nonlinear coupling between wall deformation and water and ion flows in a charged, deformable nanochannel whose viscoelasticity is governed by the Kelvin-Voigt model. Using continuum mean-field theories for mass and momentum conservation of the solid-li...

[Phys. Rev. E 98, 053101] Published Thu Nov 01, 2018

Slip-flow lattice-Boltzmann simulations in ducts and porous media: A full rehabilitation of spurious velocities

Mon, 10/29/2018 - 10:00

Author(s): M. Aminpour, S. A. Galindo-Torres, A. Scheuermann, and L. Li

Slip flow in ducts and porous media is simulated using lattice-Boltzmann method incorporated with interfacial force models. The dependence of the results on the viscosity, LBM scheme (D3Q15 and D3Q19) and the relaxation time model (single- or multirelaxation time) is investigated. The severity of sp...

[Phys. Rev. E 98, 043110] Published Mon Oct 29, 2018

Vesicle dynamics in confined steady and harmonically modulated Poiseuille flows

Mon, 10/29/2018 - 10:00

Author(s): Zakaria Boujja, Chaouqi Misbah, Hamid Ez-Zahraouy, Abdelilah Benyoussef, Thomas John, Christian Wagner, and Martin Michael Müller

We present a numerical study of the time-dependent motion of a two-dimensional vesicle in a channel under an imposed flow. In a Poiseuille flow the shape of the vesicle depends on the flow strength, the mechanical properties of the membrane, and the width of the channel as reported in the past. This...

[Phys. Rev. E 98, 043111] Published Mon Oct 29, 2018

Large-eddy simulations of turbulent thermal convection using renormalized viscosity and thermal diffusivity

Wed, 10/24/2018 - 11:00

Author(s): Sumit Vashishtha, Mahendra K. Verma, and Roshan Samuel

In this paper we employ renormalized viscosity and thermal diffusivity to construct a subgrid-scale model for large eddy simulation (LES) of turbulent thermal convection. For LES, we add νren∝Πu1/3(π/Δ)−4/3 to the kinematic viscosity; here Πu is the turbulent kinetic energy flux, and Δ is the grid s...

[Phys. Rev. E 98, 043109] Published Wed Oct 24, 2018

Force on a compressible sphere and the resonance of a bubble in standing surface acoustic waves

Tue, 10/23/2018 - 11:00

Author(s): Shen Liang, Wang Chaohui, and Hu Qiao

In this paper, the theory for acoustic radiation force exerted by standing surface acoustic waves (SSAWs) is extended to a compressible sphere in inviscid fluids. The conventional theory, developed in plane standing waves, fails to predict the radiation force incident on particles in the SSAW. Our e...

[Phys. Rev. E 98, 043108] Published Tue Oct 23, 2018

Beyond the coffee-ring effect: Pattern formation by wetting and spreading of drops

Fri, 10/19/2018 - 11:00

Author(s): Dileep Mampallil, Meenakshi Sharma, Ashwini Sen, and Shubham Sinha

Drying of colloidal drops on solid surfaces is the widely known method to form self-assembled patterns. The underlying principle of this method is the phenomenon known as the coffee-ring effect. Here, we report a phenomenon of pattern formation involving not drying but conversely wetting and spreadi...

[Phys. Rev. E 98, 043107] Published Fri Oct 19, 2018

Thermally induced interfacial instabilities and pattern formation in confined liquid nanofilms

Mon, 10/15/2018 - 11:00

Author(s): Hadi Nazaripoor, M. R. Flynn, Charles R. Koch, and Mohtada Sadrzadeh

The dynamics, instability, and pattern formation of thermally triggered thin liquid films are investigated numerically under a long-wave limit approximation. To determine the mechanisms responsible for instability growth and pattern formation in confined heated nanofilms, acoustic phonon (AP) and th...

[Phys. Rev. E 98, 043106] Published Mon Oct 15, 2018