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 10 hours ago

Multiscale velocity correlations in turbulence and Burgers turbulence: Fusion rules, Markov processes in scale, and multifractal predictions

Mon, 08/13/2018 - 11:00

Author(s): Jan Friedrich, Georgios Margazoglou, Luca Biferale, and Rainer Grauer

We compare different approaches towards an effective description of multiscale velocity field correlations in turbulence. Predictions made by the operator-product expansion, the so-called fusion rules, are placed in juxtaposition to an approach that interprets the turbulent energy cascade in terms o...

[Phys. Rev. E 98, 023104] Published Mon Aug 13, 2018

Unstable equilibria and invariant manifolds in quasi-two-dimensional Kolmogorov-like flow

Mon, 08/13/2018 - 11:00

Author(s): Balachandra Suri, Jeffrey Tithof, Roman O. Grigoriev, and Michael F. Schatz

Recent studies suggest that unstable, nonchaotic solutions of the Navier-Stokes equation may provide deep insights into fluid turbulence. In this article, we present a combined experimental and numerical study exploring the dynamical role of unstable equilibrium solutions and their invariant manifol...

[Phys. Rev. E 98, 023105] Published Mon Aug 13, 2018

Effect of soluble surfactants on the stability of stratified flows through soft-gel-coated walls

Mon, 08/13/2018 - 11:00

Author(s): B. Dinesh and S. Pushpavanam

The effect of a soluble surfactant on the linear stability of layered two-phase Poiseuille flows through soft-gel-coated parallel walls is studied in this paper. The focus is on determining the effect of the elastohydrodynamic coupling between the fluids and the soft-gel layers on the various flow i...

[Phys. Rev. E 98, 023106] Published Mon Aug 13, 2018

Oscillatory instability in a reaction front separating fluids of different densities

Mon, 08/06/2018 - 11:00

Author(s): Dan Coroian and Desiderio A. Vasquez

Reaction fronts described by the Kuramoto-Sivashinsky (KS) equation can exhibit complex behavior as they separate reacted from unreacted fluids. If the fluid of higher density is above a fluid of lower density, then the Rayleigh-Taylor instability can lead to fluid motion. In the reverse situation, ...

[Phys. Rev. E 98, 023102] Published Mon Aug 06, 2018

Ion partitioning effect on the electrophoresis of a soft particle with hydrophobic core

Mon, 08/06/2018 - 11:00

Author(s): Saurabh K. Maurya, Partha P. Gopmandal, S. Bhattacharyya, and H. Ohshima

A theoretical study on the electrophoresis of a soft particle made up of a charged hydrophobic inner core surrounded by polyelectrolyte layer (PEL) is made. The dielectric permittivity of the PEL and aqueous solution are considered to be different, which creates the ion partitioning effect. The ion ...

[Phys. Rev. E 98, 023103] Published Mon Aug 06, 2018

Inertial spheroids in homogeneous, isotropic turbulence

Fri, 08/03/2018 - 11:00

Author(s): Amal Roy, Anupam Gupta, and Samriddhi Sankar Ray

We study the rotational dynamics of inertial disks and rods in three-dimensional, homogeneous, isotropic turbulence. In particular, we show how the alignment and the decorrelation timescales of such spheroids depend, critically, on both the level of inertia and the aspect ratio of these particles. T...

[Phys. Rev. E 98, 021101(R)] Published Fri Aug 03, 2018

Fluctuation analysis of the atmospheric energy cycle

Fri, 08/03/2018 - 11:00

Author(s): Richard Blender, Denny Gohlke, and Frank Lunkeit

The atmosphere gains available potential energy by solar radiation and dissipates kinetic energy mainly in the atmospheric boundary layer. We analyze the fluctuations of the global mean energy cycle defined by Lorenz in a simulation with a simplified hydrostatic model. The energy current densities a...

[Phys. Rev. E 98, 023101] Published Fri Aug 03, 2018

Steady thermocapillary migration of a droplet in a uniform temperature gradient combined with a radiation energy source at large Marangoni numbers

Tue, 07/31/2018 - 11:00

Author(s): Zuo-Bing Wu

Steady thermocapillary droplet migration in a uniform temperature gradient combined with a radiation energy source at large Reynolds and Marangoni numbers is studied. To reach a terminal quasisteady process, the magnitude of the radiation energy source is required to preserve the conservative integr...

[Phys. Rev. E 98, 013110] Published Tue Jul 31, 2018

Magnetohydrodynamics- and magnetosolutal-transport-mediated evaporation dynamics in paramagnetic pendant droplets under field stimulus

Mon, 07/30/2018 - 11:00

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

Evaporation kinetics of pendant droplets is an area of immense importance in several applications, in addition to possessing rich fluid dynamics and thermal transport physics. This article experimentally and analytically sheds insight into the augmented evaporation dynamics of paramagnetic pendant d...

[Phys. Rev. E 98, 013109] Published Mon Jul 30, 2018

Spatial characterization of turbulent channel flow via complex networks

Fri, 07/27/2018 - 11:00

Author(s): G. Iacobello, S. Scarsoglio, J. G. M. Kuerten, and L. Ridolfi

A network-based analysis of a turbulent channel flow numerically solved at Reτ=180 is proposed as an innovative perspective for the spatial characterization of the flow field. Two spatial networks corresponding to the streamwise and wall-normal velocity components are built, where nodes represent po...

[Phys. Rev. E 98, 013107] Published Fri Jul 27, 2018

Cavitation in a liquid-filled cavity surrounded by an elastic medium: Intercoupling of cavitation events in neighboring cavities

Fri, 07/27/2018 - 11:00

Author(s): Alexander A. Doinikov, Benjamin Dollet, and Philippe Marmottant

The subject of the present theoretical study is the dynamics of a cavitation bubble in a spherical liquid-filled cavity surrounded by an infinite elastic solid. Two objectives are pursued. The first is to derive equations for the velocity and pressure fields throughout the liquid filling the cavity ...

[Phys. Rev. E 98, 013108] Published Fri Jul 27, 2018

Spectral energy scaling in precessing turbulence

Wed, 07/25/2018 - 11:00

Author(s): A. Khlifi, A. Salhi, S. Nasraoui, F. Godeferd, and C. Cambon

We study precessing turbulence, which appears in several geophysical and astrophysical systems, by direct numerical simulations of homogeneous turbulence where precessional instability is triggered due to the imposed background flow. We show that the time development of kinetic energy K occurs in tw...

[Phys. Rev. E 98, 011102(R)] Published Wed Jul 25, 2018

Estimating stable and unstable sets and their role as transport barriers in stochastic flows

Tue, 07/24/2018 - 11:00

Author(s): Sanjeeva Balasuriya and Georg A. Gottwald

We consider the situation of a large-scale stationary flow subjected to small-scale fluctuations. Assuming that the stable and unstable manifolds of the large-scale flow are known, we quantify the mean behavior and stochastic fluctuations of particles close to the unperturbed stable and unstable man...

[Phys. Rev. E 98, 013106] Published Tue Jul 24, 2018

Solution of the Noh problem with an arbitrary equation of state

Thu, 07/19/2018 - 11:00

Author(s): A. L. Velikovich and J. L. Giuliani

The classic self-similar solutions of the nonstationary compressible Euler equations obtained for a blast-wave propagation (Sedov, Taylor, and von Neumann), a shock-wave implosion (Guderley, Landau, and Stanyukovich), or an impulsive loading of a planar target (von Hoerner, Häfele, and Zel’dovich) h...

[Phys. Rev. E 98, 013105] Published Thu Jul 19, 2018

Control of Rayleigh-Taylor instability onset time and convective velocity by differential diffusion effects

Tue, 07/17/2018 - 11:00

Author(s): S. S. Gopalakrishnan, J. Carballido-Landeira, B. Knaepen, and A. De Wit

Fingering instabilities of a miscible interface between two fluids in a gravitational field can develop due to adverse density gradients as in the well-known Rayleigh-Taylor (RT) and double-diffusive (DD) instabilities. In the absence of differential diffusion, the mixing rate and the onset time of ...

[Phys. Rev. E 98, 011101(R)] Published Tue Jul 17, 2018

Pore-scale statistics of flow and transport through porous media

Fri, 07/13/2018 - 11:00

Author(s): Soroush Aramideh, Pavlos P. Vlachos, and Arezoo M. Ardekani

Flow in porous media is known to be largely affected by pore morphology. In this work, we investigate the effects of pore geometry on the transport and spatial correlations of flow through porous media in two distinct pore structures arising from three-dimensional assemblies of overlapping and nonov...

[Phys. Rev. E 98, 013104] Published Fri Jul 13, 2018

Acoustic detection of electrostatic suppression of the Leidenfrost state

Thu, 07/12/2018 - 11:00

Author(s): Arjang Shahriari, Preston S. Wilson, and Vaibhav Bahadur

At high temperatures, a droplet can rest on a cushion of its vapor (the Leidenfrost effect). Application of an electric field across the vapor gap fundamentally eliminates the Leidenfrost state by attracting liquid towards the surface. This study uses acoustic signature tracking to study electrostat...

[Phys. Rev. E 98, 013103] Published Thu Jul 12, 2018

Axisymmetric lattice Boltzmann simulation of droplet impact on solid surfaces

Mon, 07/09/2018 - 11:00

Author(s): Hussein N. Dalgamoni and Xin Yong

Droplet-solid interaction is a ubiquitous fluid phenomenon that underpins a wide range of applications. To further the understanding of this important problem, we use an axisymmetric lattice Boltzmann method (LBM) to model the droplet impact on a solid surface with different wettability. The method ...

[Phys. Rev. E 98, 013102] Published Mon Jul 09, 2018

Controlling wetting with electrolytic solutions: Phase-field simulations of a droplet-conductor system

Thu, 07/05/2018 - 11:00

Author(s): Gaute Linga, Asger Bolet, and Joachim Mathiesen

The wetting properties of immiscible two-phase systems are crucial in applications ranging from laboratory-on-a-chip devices to field-scale oil recovery. It has long been known that effective wetting properties can be altered by the application of an electric field; a phenomenon coined as electrowet...

[Phys. Rev. E 98, 013101] Published Thu Jul 05, 2018

Linear stability analysis of thermoviscous instability in immiscible displacement

Fri, 06/29/2018 - 11:00

Author(s): Christopher Nilsen

We study the thermoviscous fingering instability problem that develops when an injected fluid is displacing a fluid with different temperature and viscosity in a Hele-Shaw cell or porous medium. Using linear stability theory, we show how the thermal front caused by the different temperature of the i...

[Phys. Rev. E 97, 063112] Published Fri Jun 29, 2018