# Physical Review E

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### Transient response of nonideal ion-selective microchannel-nanochannel devices

Author(s): Neta Leibowitz, Jarrod Schiffbauer, Sinwook Park, and Gilad Yossifon

We report evidence of variation in ion selectivity of a fabricated microchannel-nanochannel device resulting in the appearance of a distinct local maximum in the overlimiting chronopotentiometric response. In this system consisting of shallow microchannels joined by a nanochannel, viscous shear at t...

[Phys. Rev. E 97, 043104] Published Thu Apr 05, 2018

### Generation of intermittent gravitocapillary waves via parametric forcing

Author(s): Gustavo Castillo and Claudio Falcón

We report on the generation of an intermittent wave field driven by a horizontally moving wave maker interacting with Faraday waves. The spectrum of the local gravitocapillary surface wave fluctuations displays a power law in frequency for a wide range of forcing parameters. We compute the probabili...

[Phys. Rev. E 97, 043101] Published Tue Apr 03, 2018

### Reduced-order model for inertial locomotion of a slender swimmer

Author(s): Raksha Mahalinkam, Felicity Gong, and Aditya S. Khair

The inertial locomotion of an elongated model swimmer in a Newtonian fluid is quantified, wherein self-propulsion is achieved via steady tangential surface treadmilling. The swimmer has a length 2l and a circular cross section of longitudinal profile aR(z), where a is the characteristic width of the...

[Phys. Rev. E 97, 043102] Published Tue Apr 03, 2018

### Electrohydrodynamic coalescence of droplets using an embedded potential flow model

Author(s): M. Garzon, L. J. Gray, and J. A. Sethian

The coalescence, and subsequent satellite formation, of two inviscid droplets is studied numerically. The initial drops are taken to be of equal and different sizes, and simulations have been carried out with and without the presence of an electrical field. The main computational challenge is the tr...

[Phys. Rev. E 97, 033112] Published Fri Mar 30, 2018

### Torque scaling in small-gap Taylor-Couette flow with smooth or grooved wall

Author(s): Bihai Zhu, Zengqi Ji, Zhengkun Lou, and Pengcheng Qian

The torque in the Taylor-Couette flow for radius ratios η≥0.97, with smooth or grooved wall static outer cylinders, is studied experimentally, with the Reynolds number of the inner cylinder reaching up to Rei=2×105, corresponding to the Taylor number up to Ta=5×1010. The grooves are perpendicular to...

[Phys. Rev. E 97, 033110] Published Mon Mar 26, 2018

### Barriers to front propagation in laminar, three-dimensional fluid flows

Author(s): Minh Doan, J. J. Simons, Katherine Lilienthal, Tom Solomon, and Kevin A. Mitchell

This paper presents an experimental study of front propagation in three-dimensional flows, showing evidence of one-way barriers that hinder the motion of the reaction fronts. In order to explain their results, the authors extend the burning-invariant-manifold theory to three dimensions, which enables them to capture the main features of the experimental results.

[Phys. Rev. E 97, 033111] Published Mon Mar 26, 2018

### Dynamic evolution of Rayleigh-Taylor bubbles from sinusoidal, W-shaped, and random perturbations

Author(s): Zhi-Rui Zhou, You-Sheng Zhang, and Bao-Lin Tian

Implicit large eddy simulations of two-dimensional Rayleigh-Taylor instability at different density ratios (i.e., Atwood number A=0.05, 0.5, and 0.9) are conducted to investigate the late-time dynamics of bubbles. To produce a flow field full of bounded, semibounded, and chaotic bubbles, three probl...

[Phys. Rev. E 97, 033108] Published Thu Mar 22, 2018

### Scale-similar clustering of heavy particles in the inertial range of turbulence

Author(s): Taketo Ariki, Kyo Yoshida, Keigo Matsuda, and Katsunori Yoshimatsu

Heavy particle clustering in turbulence is discussed from both phenomenological and analytical points of view, where the −4/3 power law of the pair-correlation function is obtained in the inertial range. A closure theory explains the power law in terms of the balance between turbulence mixing and pr...

[Phys. Rev. E 97, 033109] Published Thu Mar 22, 2018

### Liquid phase stabilization versus bubble formation at a nanoscale curved interface

Author(s): Jarrod Schiffbauer and Tengfei Luo

We investigate the nature of vapor bubble formation near a nanoscale-curved convex liquid-solid interface using two models: an equilibrium Gibbs model for homogenous nucleation, and a nonequilibrium dynamic van der Waals–diffuse-interface model for phase change in an initially cool liquid. Vapor bub...

[Phys. Rev. E 97, 033106] Published Mon Mar 19, 2018

### Enhancement of the water flow velocity through carbon nanotubes resulting from the radius dependence of the friction due to electron excitations

Author(s): J. B. Sokoloff

Secchi *et al.* [Nature (London) **537**, 210 (2016)] observed a large enhancement of the permeability and slip length in carbon nanotubes when the tube radius is of the order of 15 nm, but not in boron nitride nanotubes. It will be pointed out that none of the parameters that appear in the usual molecula...

[Phys. Rev. E 97, 033107] Published Mon Mar 19, 2018

### Relation between boundary slip mechanisms and waterlike fluid behavior

Author(s): Patricia Ternes, Evy Salcedo, and Marcia C. Barbosa

The slip of a fluid layer in contact with a solid confining surface is investigated for different temperatures and densities using molecular dynamic simulations. We show that for an anomalous waterlike fluid the slip goes as follows: for low levels of shear, defect slip appears and is related to the...

[Phys. Rev. E 97, 033104] Published Mon Mar 12, 2018

### Modeling thermal inkjet and cell printing process using modified pseudopotential and thermal lattice Boltzmann methods

Author(s): Salman Sohrabi and Yaling Liu

Pseudopotential lattice Boltzmann methods (LBMs) can simulate a phase transition in high-density ratio multiphase flow systems. If coupled with thermal LBMs through equation of state, they can be used to study instantaneous phase transition phenomena with a high-temperature gradient where only one s...

[Phys. Rev. E 97, 033105] Published Mon Mar 12, 2018

### Revised model for the radiation force exerted by standing surface acoustic waves on a rigid cylinder

Author(s): Shen Liang and Wang Chaohui

In this paper, a model for the radiation force exerted by standing surface acoustic waves (SSAWs) on a rigid cylinder in inviscid fluids is extended to account for the dependence on the Rayleigh angle. The conventional model for the radiation force used in the SSAW-based applications is developed in...

[Phys. Rev. E 97, 033103] Published Fri Mar 09, 2018

### Heavy inertial particles in turbulent flows gain energy slowly but lose it rapidly

Author(s): Akshay Bhatnagar, Anupam Gupta, Dhrubaditya Mitra, and Rahul Pandit

We present an extensive numerical study of the time irreversibility of the dynamics of heavy inertial particles in three-dimensional, statistically homogeneous, and isotropic turbulent flows. We show that the probability density function (PDF) of the increment, W(τ), of a particle's energy over a ti...

[Phys. Rev. E 97, 033102] Published Fri Mar 02, 2018

### Statistical symmetry restoration in fully developed turbulence: Renormalization group analysis of two models

Author(s): N. V. Antonov, N. M. Gulitskiy, M. M. Kostenko, and A. V. Malyshev

In this paper we consider the model of incompressible fluid described by the stochastic Navier-Stokes equation with finite correlation time of a random force. Inertial-range asymptotic behavior of fully developed turbulence is studied by means of the field theoretic renormalization group within the ...

[Phys. Rev. E 97, 033101] Published Thu Mar 01, 2018

### Time-dependent patterns in quasivertical cylindrical binary convection

Author(s): Arantxa Alonso, Isabel Mercader, and Oriol Batiste

This paper reports on numerical investigations of the effect of a slight inclination α on pattern formation in a shallow vertical cylindrical cell heated from below for binary mixtures with a positive value of the Soret coefficient. By using direct numerical simulation of the three-dimensional Bouss...

[Phys. Rev. E 97, 023108] Published Mon Feb 26, 2018

### Extremely rare collapse and build-up of turbulence in stochastic models of transitional wall flows

Author(s): Joran Rolland

This paper presents a numerical and theoretical study of multistability in two stochastic models of transitional wall flows. An algorithm dedicated to the computation of rare events is adapted on these two stochastic models. The main focus is placed on a stochastic partial differential equation mode...

[Phys. Rev. E 97, 023109] Published Mon Feb 26, 2018

### Electroconvection in a dielectric liquid between two concentric half-cylinders with rigid walls: Linear and nonlinear analysis

Author(s): Pedro A. Vázquez, Alberto T. Pérez, Philippe Traoré, and Jian Wu

We study the linear stability and nonlinear behavior of the electroconvection between two concentric half-cylinders with no-slip conditions on all boundaries. The no-slip condition makes impossible to apply the standard modal approach. Hence, we apply a finite element technique similar to the one we...

[Phys. Rev. E 97, 023106] Published Tue Feb 20, 2018

### Energy transfer in compressible magnetohydrodynamic turbulence for isothermal self-gravitating fluids

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

Three-dimensional, compressible, magnetohydrodynamic turbulence of an isothermal, self-gravitating fluid is analyzed using two-point statistics in the asymptotic limit of large Reynolds numbers (both kinetic and magnetic). Following an alternative formulation proposed by Banerjee and Galtier [Phys. ...

[Phys. Rev. E 97, 023107] Published Tue Feb 20, 2018

### Statistics of the relative velocity of particles in turbulent flows: Monodisperse particles

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

We use direct numerical simulations to calculate the joint probability density function of the relative distance R and relative radial velocity component VR for a pair of heavy inertial particles suspended in homogeneous and isotropic turbulent flows. At small scales the distribution is scale invari...

[Phys. Rev. E 97, 023105] Published Thu Feb 15, 2018