Physical Review E

Shell models on recurrent sequences: Fibonacci, Padovan, and other series
Author(s): L. Manfredini and Ö. D. Gürcan
A class of shell models is proposed where the shell variables are defined on a recurrent sequence of integer wave numbers such as the Fibonacci or the Padovan series or their variations, including a sequence made of square roots of Fibonacci numbers rounded to the nearest integer. Considering the si…
[Phys. Rev. E 111, 025103] Published Fri Feb 14, 2025
Numerical investigation of acoustic radiation force and microstreaming in a viscoelastic fluid
Author(s): Khemraj Gautam Kshetri, Andrew Cook, and Nitesh Nama
We present a numerical model to study time-averaged acoustic radiation force and microstreaming around an elastic sphere immersed within an acoustically actuated viscoelastic fluid. We employ a perturbation approach to systematically identify limiting regimes where the viscoelastic fluid can be appr…
[Phys. Rev. E 111, 025102] Published Thu Feb 13, 2025
Stochastic model for the turbulent ocean heat flux under Arctic sea ice
Author(s): S. Toppaladoddi and A. J. Wells
Arctic sea ice is one of the most sensitive components of the Earth’s climate system, and it is difficult to predict its evolution because of challenges in modeling the effects of the underlying ocean. The authors develop a simplified stochastic model for the turbulent heat flux from the ocean to the ice that shows good agreement with observational data.
[Phys. Rev. E 111, 025101] Published Wed Feb 12, 2025
Surge-protected mechanical amplifier of ion transport devised using a bipolar nanopore with broken symmetry
Author(s): Arghyadeep Paul and N. R. Aluru
Electrokinetic ion transport under coupled external electric field and pressure drops has recently exhibited giant, but monotonous, mechanical amplifications of ionic current in some nanochannels. While such effects can be exploited to develop novel pressure-sensitive ionic circuits, they can also y…
[Phys. Rev. E 111, L023101] Published Fri Feb 07, 2025
Josephson-Anderson relation as diagnostic of turbulent drag reduction by polymers
Author(s): Samvit Kumar, Simon Toedtli, Tamer A. Zaki, and Gregory L. Eyink
The detailed Josephson-Anderson relation, which equates instantaneously the volume-integrated vorticity flux and the work by pressure drop, has been the key to drag reduction in superconductors and superfluids. We employ a classical version of this relation to investigate the dynamics of polymer dra…
[Phys. Rev. E 111, 015105] Published Fri Jan 24, 2025
Effect of frequency-dependent shear and volume viscosities on molecular friction in liquids
Author(s): Henrik Kiefer, Domenico Vitali, Benjamin A. Dalton, Laura Scalfi, and Roland R. Netz
The relation between the frequency-dependent friction of a molecule in a liquid and the hydrodynamic properties of the liquid is fundamental for molecular dynamics. We investigate this connection for a water molecule moving in liquid water using all-atomistic molecular dynamics (MD) simulations and …
[Phys. Rev. E 111, 015104] Published Thu Jan 23, 2025
Enhanced aluminum combustion within supercritical water induced by underwater electrical explosion
Author(s): S. S. Liu, Y. B. Sun, C. Wang, J. K. Shao, and J. J. Tao
In this Letter, we report on the induction of aluminum combustion within supercritical water, facilitated by an underwater explosion bubble. This bubble, initiated using an aluminum-wire electrical discharge in a water-filled tank, typically spans tens of centimeters and undergoes oscillatory dynami…
[Phys. Rev. E 111, L013101] Published Wed Jan 22, 2025
Numerical study of microorganisms swimming near a convex wall in a Giesekus fluid
Author(s): Chenlin Zhu, Fangyuan Peng, Dingyi Pan, Zhaosheng Yu, and Zhaowu Lin
The motion of microorganisms in complex fluids stands out as a prominent subject within fluid mechanics. In our study, we utilize the fictitious domain method to investigate the locomotion of squirmers along a convex wall in Giesekus viscoelastic fluids. This study examines the influence of fluid el…
[Phys. Rev. E 111, 015103] Published Tue Jan 21, 2025
Quasi-irrotational approximation for the Rayleigh-Taylor instability in a solid bounded by a rigid wall
Author(s): S. A. Piriz, A. R. Piriz, and N. A. Tahir
A quasi-irrotational approximation for the linear Rayleigh-Taylor instability in elastic solids with finite thickness has been developed for the case in which the slab is in contact with a rigid wall. The approximation yields simple but still reasonably accurate expressions for the instability growt…
[Phys. Rev. E 111, 015102] Published Fri Jan 10, 2025
Exploring external rarefied gas flows through the method of fundamental solutions
Author(s): Himanshi, Anirudh Singh Rana, and Vinay Kumar Gupta
The well-known Navier-Stokes-Fourier equations of fluid dynamics are, in general, not adequate for describing rarefied gas flows. Moreover, while the Stokes equations—a simplified version of the Navier-Stokes-Fourier equations—are effective in modeling slow and steady liquid flow past a sphere, they…
[Phys. Rev. E 111, 015101] Published Tue Jan 07, 2025
Surfing droplets on nanoscopic films driven by surface acoustic waves
Author(s): N. S. Satpathi, L. Malik, S. Nandy, T. Sujith, L. Y. Yeo, and A. K. Sen
Formation of micron-sized droplets on open surfaces continues to remain a challenge in microfluidics. The problem is even stiffer for highly spreading liquids. Here, we report the formation of microdroplets from a nanoscopically thick film of low surface tension and low-viscosity liquid following it…
[Phys. Rev. E 110, 065108] Published Tue Dec 17, 2024
Fractal dimension of non-Newtonian Hele-Shaw flow subject to Saffman-Taylor instability
Author(s): J. Adriazola, B. Gu, L. J. Cummings, and L. Kondic
We introduce a discrete numerical method based on the diffusion-limited aggregation (DLA) approach to simulate two-fluid Hele-Shaw flow subject to the Saffman-Taylor interfacial instability, in the case where the displaced fluid is non-Newtonian. Focusing on fluids for which the most relevant non-Ne…
[Phys. Rev. E 110, 065107] Published Mon Dec 16, 2024
Microscale transport of ${\mathrm{CO}}_{2}$ and ${\mathrm{H}}_{2}$ storage in shale gas formations
Author(s): Lingfu Liu and Saman A. Aryana
This work focuses on microscale transport behavior of binary mixtures in the context of CO2 and H2 storage in shale gas formations. To this end, a multiple relaxation time lattice Boltzmann (LB) model is implemented to simulate microscale transport behavior. In the LB model, a combined boundary sche…
[Phys. Rev. E 110, 065105] Published Mon Dec 09, 2024
Rare, noise-induced, bypass transition in plane Couette flow can bypass instantons
Author(s): Joran Rolland
This paper presents a study of rare noise-induced transitions from stable laminar flow to transitional turbulence in plane Couette flow, which we will term buildup. We wish to study forced paths that go all the way from laminar to turbulent flow and to focus the investigation on whether these paths …
[Phys. Rev. E 110, 065106] Published Mon Dec 09, 2024
Numerical analysis of binary fluid convection with thermal and solutal lateral gradients
Author(s): Juan Sánchez Umbría and Marta Net
This paper analyzes the influence of laterally enforced solutal gradients on the steady and bifurcated periodic dynamics in binary fluids contained in horizontally heated slots, taking into account the Soret and Dufour effects. Numerical Newton-Krylov continuation techniques to follow the primary an…
[Phys. Rev. E 110, 065104] Published Fri Dec 06, 2024
Pore occupancy of gas hydrate
Author(s): David DiCarlo, Zachary W. Murphy, Kehua You, Peter B. Flemings, and Xiaoli Liu
Methane hydrate deposits are one of the largest fractions of hydrocarbons in the Earth's crust. They are found mainly in ocean sediments, and the configuration of the deposits—at the largest (kilometer) and smallest (micrometer) scales—determines how and when gaseous methane is released. Here, using…
[Phys. Rev. E 110, 065102] Published Wed Dec 04, 2024
Numerical study of thermal nonequilibrium effects on Richtmyer-Meshkov flow driven by a heavy forward-triangular bubble
Author(s): Salman Saud Alsaeed and Satyvir Singh
This paper investigates the thermal nonequilibrium effects on Richtmyer-Meshkov (RM) flow driven by a heavy forward-triangular bubble. Numerical laminar simulations are performed by utilizing the compressible dimensionless Navier-Fourier equations obtained from the Boltzmann-Curtiss transport equati…
[Phys. Rev. E 110, 065103] Published Wed Dec 04, 2024
Rayleigh-Taylor instability in multiple finite-thickness fluid layers
Author(s): Prashant Sharma
We develop a general transfer-matrix formalism for determining the growth rate of the Rayleigh-Taylor instability in a fluid system with spatially varying density and viscosity. We use this formalism to analytically and numerically treat the case of a stratified heterogeneous fluid. We introduce the…
[Phys. Rev. E 110, L063101] Published Tue Dec 03, 2024
Reversible logic with a nanofluidic memristor
Author(s): Sergio Portillo, Javier Cervera, Salvador Mafe, and Patricio Ramirez
A multipore membrane with current-rectifying nanofluidic diodes exhibits memristive properties based on the surface-charge-regulated ionic transport. The neuromorphiclike potentiation of the conductance by voltage pulses provides different functionalities that can be modulated not only by the amplit…
[Phys. Rev. E 110, 065101] Published Mon Dec 02, 2024
Contrasting thermodynamic and hydrodynamic entropy
Author(s): Mahendra K. Verma, Rodion Stepanov, and Alexandre Delache
In this paper, using hydrodynamic entropy, we quantify multiscale disorder in Euler and hydrodynamic turbulence. These examples illustrate that the hydrodynamic entropy is not extensive because it is not proportional to the system size. Consequently, we cannot add hydrodynamic and thermodynamic entr…
[Phys. Rev. E 110, 055106] Published Mon Nov 25, 2024