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 9 hours ago

Breakup of a leaky dielectric drop in a uniform electric field

Thu, 04/18/2019 - 11:00

Author(s): Qingming Dong and Amalendu Sau

Electrohydrodynamic (EHD) breakup phenomena for a leaky dielectric drop suspended in another immiscible viscous dielectric and subjected to a uniform electric field are examined using the leaky dielectric theory and the explicit forcing lattice Boltzmann method, by taking into account full nonlinear...

[Phys. Rev. E 99, 043106] Published Thu Apr 18, 2019

Linear motion of multiple superposed viscous fluids

Tue, 04/16/2019 - 11:00

Author(s): Magnus Vartdal and Andreas N. Osnes

In this paper the small-amplitude motion of multiple superposed viscous fluids is studied as a linearized initial-value problem. The analysis results in a closed set of equations for the Laplace transformed amplitudes of the interfaces that can be inverted numerically. The derived equations also con...

[Phys. Rev. E 99, 043104] Published Tue Apr 16, 2019

Contact-angle-hysteresis effects on a drop sitting on an incline plane

Tue, 04/16/2019 - 11:00

Author(s): Pablo D. Ravazzoli, Ingrith Cuellar, Alejandro G. González, and Javier A. Diez

We study the contact-angle hysteresis and morphology changes of a liquid drop sitting on a solid substrate inclined with respect to the horizontal at an angle α. This one is always smaller than the critical angle, αcrit, above which the drop would start to slide down. The hysteresis cycle is perform...

[Phys. Rev. E 99, 043105] Published Tue Apr 16, 2019

Comparative study of the dynamics of laser and acoustically generated bubbles in viscoelastic media

Wed, 04/10/2019 - 11:00

Author(s): Chad T. Wilson, Timothy L. Hall, Eric Johnsen, Lauren Mancia, Mauro Rodriguez, Jonathan E. Lundt, Tim Colonius, David L. Henann, Christian Franck, Zhen Xu, and Jonathan R. Sukovich

Experimental observations of the growth and collapse of acoustically and laser-nucleated single bubbles in water and agarose gels of varying stiffness are presented. The maximum radii of generated bubbles decreased as the stiffness of the media increased for both nucleation modalities, but the maxim...

[Phys. Rev. E 99, 043103] Published Wed Apr 10, 2019

Uplift of an elastic membrane by a viscous flow

Thu, 04/04/2019 - 11:00

Author(s): Michael Berhanu, Adrien Guérin, Sylvain Courrech du Pont, Fiona Raoult, Rémi Perrier, and Chloé Michaut

Pumping a viscous fluid underneath an elastic sheet will cause the sheet to bulge upward. The liquid pressure is balanced by the sheet’s elasticity as well as gravity. The authors’ experiment shows reasonable agreement with two different theories, and may provide a model for the formation of magma intrusions between layers of rock.

[Phys. Rev. E 99, 043102] Published Thu Apr 04, 2019

Thermocapillary thin-film flows on a compliant substrate

Tue, 04/02/2019 - 11:00

Author(s): Youchuang Chao and Zijing Ding

We study the dynamics of a thin liquid film on a compliant substrate in the presence of thermocapillary effect. A set of long-wave equations are derived to investigate the effects of fluid gravity (G), fluid inertia (Re), and Marangoni stresses (Ma) on the dynamics of the liquid film and the complia...

[Phys. Rev. E 99, 043101] Published Tue Apr 02, 2019

Rupture time of droplets impacted by a burst of picosecond laser pulses

Fri, 03/29/2019 - 10:00

Author(s): Duane Hudgins and Reza S. Abhari

Liquid Sn droplets were irradiated with shaped bursts of picosecond laser pulses. The shapes of the deforming droplets following the impact of the recoil pressure induced by these bursts were imaged using a high-speed shadowgraph system. The rupture time t̃b of the droplet expanding as a thin fluid ...

[Phys. Rev. E 99, 031102(R)] Published Fri Mar 29, 2019

Turbulent convection and large scale circulation in a cube with rough horizontal surfaces

Thu, 03/28/2019 - 10:00

Author(s): N. Foroozani, J. J. Niemela, V. Armenio, and K. R. Sreenivasan

Large-eddy simulations of thermal convection are presented and discussed for a cube with rough horizontal surfaces. Two types of roughness are considered: uniformly placed pyramids, and grooves aligned parallel to one set of sidewalls. The Rayleigh number is 108, the Prandtl number 0.7, and the aspe...

[Phys. Rev. E 99, 033116] Published Thu Mar 28, 2019

Analog cosmology with two-fluid systems in a strong gradient magnetic field

Wed, 03/27/2019 - 10:00

Author(s): Zack Fifer, Theo Torres, Sebastian Erne, Anastasios Avgoustidis, Richard J. A. Hill, and Silke Weinfurtner

Inflation refers to the exponential expansion of the early universe that can explain many of the properties we see today. The authors of this work propose an experimental analog in which the interface between two immiscible, magnetic fluids shows inflationary behavior. The work shows that waves created at the interface could reproduce known solutions of inflationary models, and suggests a variety of other cosmological scenarios that could be simulated.

[Phys. Rev. E 99, 031101(R)] Published Wed Mar 27, 2019

Effect of pressure on joint cascade of kinetic energy and helicity in compressible helical turbulence

Wed, 03/27/2019 - 10:00

Author(s): Zheng Yan, Xinliang Li, Jianchun Wang, and Changping Yu

Direct numerical simulations of three-dimensional compressible helical turbulence are carried out at a grid resolution of 10243 to investigate the effect of pressure, which is important for the joint cascade of kinetic energy and helicity in compressible helical turbulence. The principal finding is ...

[Phys. Rev. E 99, 033114] Published Wed Mar 27, 2019

Localized Faraday patterns under heterogeneous parametric excitation

Wed, 03/27/2019 - 10:00

Author(s): Héctor Urra, Juan F. Marín, Milena Páez-Silva, Majid Taki, Saliya Coulibaly, Leonardo Gordillo, and Mónica A. García-Ñustes

Faraday waves are a classic example of a system in which an extended pattern emerges under spatially uniform forcing. Motivated by systems in which uniform excitation is not plausible, we study both experimentally and theoretically the effect of heterogeneous forcing on Faraday waves. Our experiment...

[Phys. Rev. E 99, 033115] Published Wed Mar 27, 2019

Phase-field modeling of an immiscible liquid-liquid displacement in a capillary

Thu, 03/21/2019 - 10:00

Author(s): S. Prokopev, A. Vorobev, and T. Lyubimova

We develop a numerical model for a two-phase flow of a pair of immiscible liquids within a capillary tube. We assume that a capillary is initially saturated with one liquid and the other liquid is injected via one of the capillary's ends. The governing equations are solved in the velocity-pressure f...

[Phys. Rev. E 99, 033113] Published Thu Mar 21, 2019

Onset of double-diffusive convection in near-critical gas mixtures

Mon, 03/18/2019 - 10:00

Author(s): Zhan-Chao Hu, Stephen H. Davis, and Xin-Rong Zhang

Near the thermodynamic critical point, the physical properties of binary fluids exhibit large variations in response to small temperature and concentration differences, whose effects on the onset of double-diffusive convection are reported here. The vertical symmetry is broken, irregular penetrative...

[Phys. Rev. E 99, 033112] Published Mon Mar 18, 2019

Mutual-friction-driven turbulent statistics in the hydrodynamic regime of superfluid $^{3}\mathrm{He}$-B

Wed, 03/13/2019 - 10:00

Author(s): Kishore Dutta

It is well known that the turbulence that evolves from the tangles of vortices in quantum fluids at scales larger than the typical quantized vortex spacing ℓ has a close resemblance with classical turbulence. The temperature-dependent mutual friction parameter α(T) drives the turbulent statistics in...

[Phys. Rev. E 99, 033111] Published Wed Mar 13, 2019

Generation of a magnetic field by a double vortex in a rotating cylinder

Mon, 03/11/2019 - 10:00

Author(s): M. C. Navarro, D. Castaño, and H. Herrero

In this paper we use simulations of the magnetohydrodynamic equations coupled with heat to show the generation of magnetic field by the dynamical interaction of a pair of vortices in a fluid electrically conducting within a cylindrical domain nonhomogeneously heated from below, setting in a rotation...

[Phys. Rev. E 99, 033109] Published Mon Mar 11, 2019

Suppression of Rayleigh-Taylor turbulence by time-periodic acceleration

Mon, 03/11/2019 - 10:00

Author(s): G. Boffetta, M. Magnani, and S. Musacchio

The dynamics of Rayleigh-Taylor turbulence convection in the presence of an alternating, time-periodic acceleration is studied by means of extensive direct numerical simulations of the Boussinesq equations. Within this framework, we discover a mechanism of relaminarization of turbulence: the alterna...

[Phys. Rev. E 99, 033110] Published Mon Mar 11, 2019

Pore network model for permeability characterization of three-dimensionally-printed porous materials for passive microfluidics

Thu, 03/07/2019 - 10:00

Author(s): Agnese Piovesan, Clement Achille, Rob Ameloot, Bart Nicolai, and Pieter Verboven

Stand-alone and portable lab-on-chips (LOC) can be obtained by exploiting capillary flow in porous media. Polymethylmethacrylate (PMMA) platforms obtained through powder-based three-dimensional (3D) printing are appropriate for capillarity-driven LOCs. However, fluid flow in such platforms needs to ...

[Phys. Rev. E 99, 033107] Published Thu Mar 07, 2019

Anomalous transport dependence on Péclet number, porous medium heterogeneity, and a temporally varying velocity field

Thu, 03/07/2019 - 10:00

Author(s): Alon Nissan and Brian Berkowitz

We investigate the effects of the Péclet number (Pe) on transport of an inert chemical tracer in heterogeneous porous media. We simulate fluid flow and transport through two-dimensional pore-scale matrices with varying structural complexity. With increasing Pe, the anomalous nature of the transport ...

[Phys. Rev. E 99, 033108] Published Thu Mar 07, 2019

High jump of impinged droplets before Leidenfrost state

Tue, 03/05/2019 - 10:00

Author(s): Lu Qiu, Swapnil Dubey, Fook Hoong Choo, and Fei Duan

Unlike the traditionally reported Leidenfrost droplet which only floats on a thin film of vapor, we observe a prominent jump of the impinged droplets in the transition from the contact boiling to the Leidenfrost state. The vapor generation between the droplet and the substrate is vigorous enough to ...

[Phys. Rev. E 99, 033106] Published Tue Mar 05, 2019

Dynamics of supernova bounce in laboratory

Mon, 03/04/2019 - 10:00

Author(s): S. I. Blinnikov, R. I. Ilkaev, M. A. Mochalov, A. L. Mikhailov, I. L. Iosilevskiy, A. V. Yudin, S. I. Glazyrin, A. A. Golubev, V. K. Gryaznov, and S. V. Fortova

We draw attention to recent high-explosive (HE) experiments which provide compression of macroscopic amount of matter to high, even record, values of pressure in comparison with other HE experiments. The observed bounce after the compression corresponds to processes in core-collapse supernova explos...

[Phys. Rev. E 99, 033102] Published Mon Mar 04, 2019