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 12 hours ago

Effects of surfactant transport on electrodeformation of a viscous drop

Mon, 06/10/2019 - 11:00

Author(s): Herve Nganguia, On Shun Pak, and Y.-N. Young

In this work we quantify the effects of surfactant transport on the deformation of a viscous drop under a DC electric field. We study how convective and diffusive transport of surfactants at drop surfaces influence the equilibrium and dynamic deformation of a leaky dielectric drop and a conducting d...

[Phys. Rev. E 99, 063104] Published Mon Jun 10, 2019

Minimal surfaces in porous media: Pore-scale imaging of multiphase flow in an altered-wettability Bentheimer sandstone

Mon, 06/10/2019 - 11:00

Author(s): Qingyang Lin, Branko Bijeljic, Steffen Berg, Ronny Pini, Martin J. Blunt, and Samuel Krevor

High-resolution x-ray imaging is used in combination with measurements of permeability and capillary pressure to study multiphase flow in a porous sample. The authors characterized interfaces between brine and oil in a sandstone sample under a variety of conditions. Similar experimental approaches could be useful for other studies.

[Phys. Rev. E 99, 063105] Published Mon Jun 10, 2019

Direct numerical simulation and Reynolds-averaged Navier-Stokes modeling of the sudden viscous dissipation for multicomponent turbulence

Wed, 06/05/2019 - 11:00

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

Simulations of a turbulent multicomponent fluid mixture undergoing isotropic deformations are carried out to investigate the sudden viscous dissipation. This dissipative mechanism was originally demonstrated using simulations of an incompressible single-component fluid [S. Davidovits and N. J. Fisch...

[Phys. Rev. E 99, 063103] Published Wed Jun 05, 2019

Stochastic flow approach to model the mean velocity profile of wall-bounded flows

Mon, 06/03/2019 - 11:00

Author(s): Benoît Pinier, Etienne Mémin, Sylvain Laizet, and Roger Lewandowski

There is no satisfactory model to explain the mean velocity profile of the whole turbulent layer in canonical wall-bounded flows. In this paper, a mean velocity profile expression is proposed for wall-bounded turbulent flows based on a recently proposed stochastic representation of fluid flows dynam...

[Phys. Rev. E 99, 063101] Published Mon Jun 03, 2019

Coalescence-induced droplet detachment on low-adhesion surfaces: A three-phase system study

Mon, 06/03/2019 - 11:00

Author(s): Mostafa Moradi, Mohammad Hassan Rahimian, and Seyed Farshid Chini

Coalescing water droplets on superhydrophobic surfaces can detach from the surface without the aid of any external forces. This self-propelled droplet detachment mechanism is useful in many applications, such as phase change heat transfer enhancement, self-cleaning surfaces, and anti-icing and antid...

[Phys. Rev. E 99, 063102] Published Mon Jun 03, 2019

Rapidly rotating Rayleigh-Bénard convection with a tilted axis

Tue, 05/28/2019 - 11:00

Author(s): L. Novi, J. von Hardenberg, D. W. Hughes, A. Provenzale, and E. A. Spiegel

We numerically explore the dynamics of an incompressible fluid heated from below, bounded by free-slip horizontal plates and periodic lateral boundary conditions, subject to rapid rotation about a distant axis that is tilted with respect to the gravity vector. The angle ϕ between the rotation axis a...

[Phys. Rev. E 99, 053116] Published Tue May 28, 2019

Asymmetric time-cross-correlation of nonequilibrium concentration fluctuations in a ternary liquid mixture

Thu, 05/23/2019 - 11:00

Author(s): Doriano Brogioli, Fabrizio Croccolo, and Alberto Vailati

Equilibrium phenomena are characterized by time symmetry. Thermodynamic fluctuations are also time-symmetric at equilibrium. Conversely, diffusion of a solute in a liquid in the presence of a gradient is a nonequilibrium phenomenon, which gives rise to long-range fluctuations with amplitude much lar...

[Phys. Rev. E 99, 053115] Published Thu May 23, 2019

Artificial neural network approach to large-eddy simulation of compressible isotropic turbulence

Tue, 05/21/2019 - 11:00

Author(s): Chenyue Xie, Jianchun Wang, Ke Li, and Chao Ma

A subgrid-scale (SGS) model for large-eddy simulation (LES) of compressible isotropic turbulence is constructed by using a data-driven framework. An artificial neural network (ANN) based on local stencil geometry is employed to predict the unclosed SGS terms. The input features are based on the firs...

[Phys. Rev. E 99, 053113] Published Tue May 21, 2019

Local estimates of Hölder exponents in turbulent vector fields

Tue, 05/21/2019 - 11:00

Author(s): F. Nguyen, J.-P. Laval, P. Kestener, A. Cheskidov, R. Shvydkoy, and B. Dubrulle

It is still not known whether solutions to the Navier-Stokes equation can develop singularities from regular initial conditions. In particular, a classical and unsolved problem is to prove that the velocity field is Hölder continuous with some exponent h<1 (i.e., not necessarily differentiable) a...

[Phys. Rev. E 99, 053114] Published Tue May 21, 2019

Discontinuity in the sedimentation system with two particles having different densities in a vertical channel

Mon, 05/20/2019 - 11:00

Author(s): Deming Nie and Jianzhong Lin

The two-dimensional lattice Boltzmann method was used to numerically study a sedimentation system with two particles having different densities in a vertical channel for Galileo numbers in the range of 5≤Ga≤15 (resulting in a Reynolds number, based on the settling velocity, approximately ranging bet...

[Phys. Rev. E 99, 053112] Published Mon May 20, 2019

Numerical simulation of flow over a parallel cantilevered flag in the vicinity of a rigid wall

Thu, 05/16/2019 - 11:00

Author(s): Li Wang and Fang-bao Tian

Flow over a parallel cantilevered flag in the vicinity of a rigid wall is numerically studied using an immersed boundary–lattice Boltzmann method (IB–LBM) in two-dimensional domain, where the dynamics of the fluid and structure are, respectively, solved by the LBM and a finite-element method (FEM), ...

[Phys. Rev. E 99, 053111] Published Thu May 16, 2019

Effect of finite amplitude of bottom corrugations on Fabry-Perot resonance of water waves

Wed, 05/15/2019 - 11:00

Author(s): Jie Zhang and Michel Benoit

Recently, the mechanism of Fabry-Perot (F-P) resonance in optics was extended to monochromatic water waves propagating in a domain with two patches of sinusoidal corrugations on an otherwise flat bottom. Assuming small-amplitude surface waves, an asymptotic linear analytical solution (ALAS) was deri...

[Phys. Rev. E 99, 053109] Published Wed May 15, 2019

Faraday waves over a permeable rough substrate

Wed, 05/15/2019 - 11:00

Author(s): Diego Barba Maggi, Alejandro Boschan, Roman Martino, Marcelo Piva, and Jean-Christophe Géminard

We report on an experimental study of the Faraday instability in a vibrated fluid layer situated over a permeable and rough substrate, consisting either of a flat solid plate or of woven meshes having different openings and wire diameters, open or closed (by a sealing paint). We measure the critical...

[Phys. Rev. E 99, 053110] Published Wed May 15, 2019

Propulsion by stiff elastic filaments in viscous fluids

Mon, 05/13/2019 - 11:00

Author(s): Panayiota Katsamba and Eric Lauga

Flexible filaments moving in viscous fluids are ubiquitous in the natural microscopic world. For example, the swimming of bacteria and spermatozoa as well as important physiological functions at organ level, such as the cilia-induced motion of mucus in the lungs, or individual cell level, such as ac...

[Phys. Rev. E 99, 053107] Published Mon May 13, 2019

Normal and oblique droplet impingement dynamics on moving dry walls

Mon, 05/13/2019 - 11:00

Author(s): K. Ashoke Raman

Industrial applications that depend on jetting-based technology, such as painting or additive layered manufacturing, involve sequential deposition of droplets onto a moving surface. Spreading and receding dynamics of these impinging drops depend on the momentum transferred by the moving wall to the ...

[Phys. Rev. E 99, 053108] Published Mon May 13, 2019

Orthogonal wavelet multiresolution analysis of the turbulent boundary layer measured with two-dimensional time-resolved particle image velocimetry

Thu, 05/09/2019 - 11:00

Author(s): Guosheng He, Jinjun Wang, and Akira Rinoshika

The turbulent boundary layer flow measured by two-dimensional time-resolved particle image velocimetry is analyzed using the discrete orthogonal wavelet method. The Reynolds number of the turbulent boundary layer based on the friction velocity is Reτ=235. The flow field is decomposed into a number o...

[Phys. Rev. E 99, 053105] Published Thu May 09, 2019

Nonlinear dynamics of two coupled bubbles oscillating inside a liquid-filled cavity surrounded by an elastic medium

Thu, 05/09/2019 - 11:00

Author(s): Alexander A. Doinikov, Diane Bienaimé, S. Roberto Gonzalez-Avila, Claus-Dieter Ohl, and Philippe Marmottant

A theory is developed to model the nonlinear dynamics of two coupled bubbles inside a spherical liquid-filled cavity surrounded by an elastic medium. The aim is to study how the conditions of full confinement affect the coupled oscillations of the bubbles. To make the problem amenable to analytical ...

[Phys. Rev. E 99, 053106] Published Thu May 09, 2019

Regime transition in the energy cascade of rotating turbulence

Wed, 05/08/2019 - 11:00

Author(s): T. Pestana and S. Hickel

Transition from a split to a forward kinetic energy cascade system is explored in the context of rotating turbulence using direct numerical simulations with a three-dimensional isotropic random force uncorrelated with the velocity field. Our parametric study covers confinement effects in high-aspect...

[Phys. Rev. E 99, 053103] Published Wed May 08, 2019

Rayleigh-Taylor-instability experiments with elastic-plastic materials

Wed, 05/08/2019 - 11:00

Author(s): Rinosh Polavarapu, Pamela Roach, and Arindam Banerjee

A rotating wheel experimental facility was developed to investigate incompressible Rayleigh-Taylor instability in elastic-plastic materials. A soft solid (mayonnaise) was chosen as the elastic-plastic material for experiments; material properties that include shear modulus and yield strength were fu...

[Phys. Rev. E 99, 053104] Published Wed May 08, 2019

Effects of the Atwood number on the Richtmyer-Meshkov instability in elastic-plastic media

Mon, 05/06/2019 - 11:00

Author(s): Qian Chen, Li Li, Yousheng Zhang, and Baolin Tian

The Richtmyer-Meshkov instability of small perturbed single-mode interfaces between an elastic-plastic solid and an inviscid liquid is investigated by theoretical analysis and numerical simulation in this work. A modified model including the Atwood number effect is proposed to describe the long-term...

[Phys. Rev. E 99, 053102] Published Mon May 06, 2019