Physical Review E

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Recently published articles in Phys. Rev. E in the Table of Content section "Fluid dynamics"
Updated: 2 days 4 hours ago

Small-Peclet-number approximation for stellar turbulent mixing zones

Fri, 09/18/2020 - 11:00

Author(s): Jean-Cédric Chkair, Olivier Soulard, Jérôme Griffond, and Xavier Blanc

The purpose of this work is to derive a small turbulent Péclet–small turbulent Mach number approximation for hydroradiative turbulent mixing zones encountered in stellar interiors where the radiative conductivity can overwhelms the turbulent transport. To this end, we proceed to an asymptotic analys...

[Phys. Rev. E 102, 033111] Published Fri Sep 18, 2020

Molecular transportation phenomena of simple liquids through a nanoporous graphene membrane

Tue, 09/15/2020 - 11:00

Author(s): Mohammad Rashedul Hasan and BoHung Kim

The mechanism of pressure-driven transport of simple liquid through a nanoporous graphene membrane has been analyzed using nonequilibrium molecular dynamics simulation. In this study, we investigate liquid dynamics properties such as local density, pressure variation, and local viscosity depending o...

[Phys. Rev. E 102, 033110] Published Tue Sep 15, 2020

From turbulence to landscapes: Logarithmic mean profiles in bounded complex systems

Mon, 09/14/2020 - 11:00

Author(s): Milad Hooshyar, Sara Bonetti, Arvind Singh, Efi Foufoula-Georgiou, and Amilcare Porporato

We show that similarly to the logarithmic mean-velocity profile in wall-bounded turbulence, the landscape topography presents an intermediate region with a logarithmic mean-elevation profile. Such profiles are present in complex topographies with channel branching and fractal river networks resultin...

[Phys. Rev. E 102, 033107] Published Mon Sep 14, 2020

Nonspherical modes nondegeneracy of a tethered bubble

Mon, 09/14/2020 - 11:00

Author(s): Maxime Fauconnier, Jean-Christophe Béra, and Claude Inserra

When excited at sufficiently high acoustic pressures, a wall-attached bubble may exhibit asymmetric nonspherical modes. These vibration modes can be decomposed over the set of spherical harmonics Ynm(θ,ϕ) for a degree n and order m. We experimentally capture the time-resolved dynamics of asymmetric ...

[Phys. Rev. E 102, 033108] Published Mon Sep 14, 2020

Diffusion enhancement in a levitated droplet via oscillatory deformation

Mon, 09/14/2020 - 11:00

Author(s): Yuki Koyano, Hiroyuki Kitahata, Koji Hasegawa, Satoshi Matsumoto, Katsuhiro Nishinari, Tadashi Watanabe, Akiko Kaneko, and Yutaka Abe

Recent experimental results indicate that mixing is enhanced by a reciprocal flow induced inside a levitated droplet with an oscillatory deformation [T. Watanabe et al., Sci. Rep. 8, 10221 (2018)]. Generally, reciprocal flow cannot convect the solutes in time average, and agitation cannot take place...

[Phys. Rev. E 102, 033109] Published Mon Sep 14, 2020

Pinning-depinning of the contact line during drop evaporation on textured surfaces: A lattice Boltzmann study

Wed, 09/09/2020 - 11:00

Author(s): Kamal Jannati, Mohammad Hassan Rahimian, and Mostafa Moradi

The evaporation of the liquid droplet on a structured surface is numerically investigated using the lattice Boltzmann method. Simulations are carried out for different contact angles and pillar widths. From the simulation for the Cassie state, it is found that the evaporation starts in a pinned cont...

[Phys. Rev. E 102, 033106] Published Wed Sep 09, 2020

Microscale modeling of nondilute flow and transport in porous medium systems

Tue, 09/08/2020 - 11:00

Author(s): Timothy M. Weigand and Cass T. Miller

Nondilute transport occurs routinely in porous medium systems. Experimental observations have revealed effects that seemingly depend upon density, viscosity, velocity, and chemical activity. Macroscale models based upon averaged behavior over many pores have been relied upon to describe such systems...

[Phys. Rev. E 102, 033104] Published Tue Sep 08, 2020

Linearly forced isotropic turbulence at low Reynolds numbers

Tue, 09/08/2020 - 11:00

Author(s): Wouter J. T. Bos, Faouzi Laadhari, and Wesley Agoua

We investigate the forcing strength needed to sustain a flow using linear forcing. A critical Reynolds number Rc is determined, based on the longest wavelength allowed by the system, the forcing strength and the viscosity. A simple model is proposed for the dissipation rate, leading to a closed expr...

[Phys. Rev. E 102, 033105] Published Tue Sep 08, 2020

Breakup of an electrified viscoelastic liquid bridge

Thu, 09/03/2020 - 11:00

Author(s): Manuel Rubio, Emilio J. Vega, Miguel A. Herrada, José M. Montanero, and Francisco J. Galindo-Rosales

We study both numerically and experimentally the breakup of a viscoelastic liquid bridge formed between two parallel electrodes. The polymer solutions and applied voltages are those commonly used in electrospinning and near-field electrospinning. We solve the leaky-dielectric finitely extensible non...

[Phys. Rev. E 102, 033103] Published Thu Sep 03, 2020

Three-dimensional multiscale flow structures behind a wall-mounted short cylinder based on tomographic particle image velocimetry and three-dimensional orthogonal wavelet transform

Wed, 09/02/2020 - 11:00

Author(s): Hiroka Rinoshika, Akira Rinoshika, and Jin-Jun Wang

Three-dimensional (3D) flow structures around a wall-mounted short cylinder of height-to-diameter ratio 1 were instantaneously measured by a high-resolution tomographic particle image velocimetry (Tomo-PIV) at Reynolds number of 10 720 in a water tunnel. 3D velocity fields, 3D vorticity, the Q crite...

[Phys. Rev. E 102, 033101] Published Wed Sep 02, 2020

Scaling laws of electroconvective flow with finite vortex height near permselective membranes

Wed, 09/02/2020 - 11:00

Author(s): Wei Liu, Yueting Zhou, and Pengpeng Shi

In a steady state, the linear scaling laws are confirmed between the intensity characteristics of electroconvective (EC) vortex (including the vortex height and electroosmotic slip velocity) and the applied voltage for the nonshear EC flow with finite vortex height near permselective membranes. This...

[Phys. Rev. E 102, 033102] Published Wed Sep 02, 2020

Rupture process of liquid bridges: The effects of thermal fluctuations

Mon, 08/31/2020 - 11:00

Author(s): Jiayi Zhao, Nan Zhou, Kaixuan Zhang, Shuo Chen, Yang Liu, and Yuxiang Wang

Rupture of a liquid bridge is a complex dynamic process, which has attracted much attention over several decades. We numerically investigated the effects of the thermal fluctuations on the rupture process of liquid bridges by using a particle-based method know as many-body dissipative particle dynam...

[Phys. Rev. E 102, 023116] Published Mon Aug 31, 2020

Waves and instabilities of viscoelastic fluid film flowing down an inclined wavy bottom

Mon, 08/31/2020 - 11:00

Author(s): Sanghasri Mukhopadhyay and Asim Mukhopadhyay

Evolution of waves and hydrodynamic instabilities of a thin viscoelastic fluid film flowing down an inclined wavy bottom of moderate steepness have been analyzed analytically and numerically. The classical long-wave expansion method has been used to formulate a nonlinear evolution equation for the d...

[Phys. Rev. E 102, 023117] Published Mon Aug 31, 2020

Modeling drug delivery from multiple emulsions

Wed, 08/26/2020 - 11:00

Author(s): G. Pontrelli, E. J. Carr, A. Tiribocchi, and S. Succi

We present a mechanistic model of drug release from a multiple emulsion into an external surrounding fluid. We consider a single multilayer droplet where the drug kinetics are described by a pure diffusive process through different liquid shells. The multilayer problem is described by a system of di...

[Phys. Rev. E 102, 023114] Published Wed Aug 26, 2020

Interaction of wave-driven particles with slit structures

Wed, 08/26/2020 - 11:00

Author(s): Clive Ellegaard and Mogens T. Levinsen

Just over a decade ago Couder and Fort [Phys. Rev. Lett. 97, 154101 (2006)] published a provocative paper suggesting that a classical system might be able to simulate the truly fundamental quantum mechanical single- and double-slit experiment. The system they investigated was that of an oil droplet ...

[Phys. Rev. E 102, 023115] Published Wed Aug 26, 2020

Parameter space mapping of the Princeton magnetorotational instability experiment

Mon, 08/24/2020 - 11:00

Author(s): Himawan W. Winarto, Hantao Ji, Jeremy Goodman, Fatima Ebrahimi, Erik P. Gilson, and Yin Wang

Extensive simulations of the Princeton Magnetorotational Instability (MRI) Experiment with the Spectral/Finite Element code for Maxwell and Navier-Stokes Equations (SFEMaNS) have been performed to map the MRI-unstable region as a function of inner cylinder angular velocity and applied vertical magne...

[Phys. Rev. E 102, 023113] Published Mon Aug 24, 2020

Three-dimensional viscous Rayleigh-Taylor instability at the cylindrical interface

Fri, 08/21/2020 - 11:00

Author(s): R. H. Zeng, J. J. Tao, and Y. B. Sun

In this paper, the rotational part of the disturbance flow field caused by viscous Rayleigh-Taylor instability (RTI) at the cylindrical interface is considered, and the most unstable mode is revealed to be three-dimensional for interfaces of small radii R. With an increase in R, the azimuthal wave n...

[Phys. Rev. E 102, 023112] Published Fri Aug 21, 2020

Stability of surfactant-laden liquid film flow over a cylindrical rod

Wed, 08/19/2020 - 11:00

Author(s): Ashwin Nair and Gaurav Sharma

The stability of surfactant-laden liquid film flow over a cylindrical rod is examined in creeping flow limit using standard temporal linear stability analysis. The clean film flow configuration (i.e., in absence of surfactant) is well-known to become unstable owing to Rayleigh-Plateau instability of...

[Phys. Rev. E 102, 023111] Published Wed Aug 19, 2020

Dynamics of water injection in an oil-wet reservoir rock at subsurface conditions: Invasion patterns and pore-filling events

Fri, 08/14/2020 - 11:00

Author(s): Abdulla Alhosani, Alessio Scanziani, Qingyang Lin, Sajjad Foroughi, Amer M. Alhammadi, Martin J. Blunt, and Branko Bijeljic

We use fast synchrotron x-ray microtomography to investigate the pore-scale dynamics of water injection in an oil-wet carbonate reservoir rock at subsurface conditions. We measure, in situ, the geometric contact angles to confirm the oil-wet nature of the rock and define the displacement contact ang...

[Phys. Rev. E 102, 023110] Published Fri Aug 14, 2020

Wettability and capillary effects: Dynamics of pinch-off in unconstricted straight capillary tubes

Wed, 08/12/2020 - 11:00

Author(s): Soheil Esmaeilzadeh, Zhipeng Qin, Amir Riaz, and Hamdi A. Tchelepi

We study the interfacial evolution of immiscible two-phase flow within a capillary tube in the partial wetting regime using direct numerical simulation. We investigate the flow patterns resulting from the displacement of a more viscous fluid by a less viscous one under a wide range of wettability co...

[Phys. Rev. E 102, 023109] Published Wed Aug 12, 2020