Physical Review E
Current-vortex-sheet model of the magnetic Rayleigh-Taylor instability
Author(s): Seunghyeon Baek and Sung-Ik Sohn
This study investigates the Rayleigh-Taylor instability in the magnetic field applied parallel to the interface. The motion of the interface is described using a current-vortex-sheet model. The growth rate of the interface is obtained from a linear stability analysis of the model. The interface of a…
[Phys. Rev. E 110, 055102] Published Tue Nov 05, 2024
Mass transfer in developing flow of a reactive mixture through a curved cylindrical tube
Author(s): Minyoung Kim and Ali Borhan
Mass transfer to the reactive wall of a curved cylindrical tube is analyzed in the combined entry region where both momentum and concentration boundary layers are developing. The velocity and concentration distributions developing from uniform inlet profiles are obtained using perturbation analysis,…
[Phys. Rev. E 110, 055101] Published Mon Nov 04, 2024
Hydrodynamic fluctuations near a Hopf bifurcation: Stochastic onset of vortex shedding behind a circular cylinder
Author(s): Ryan M. McMullen and Michael A. Gallis
We investigate hydrodynamic fluctuations in the flow past a circular cylinder near the critical Reynolds number Rec for the onset of vortex shedding. Starting from the fluctuating Navier-Stokes equations, we perform a perturbation expansion around Rec to derive analytical expressions for the statist…
[Phys. Rev. E 110, 045104] Published Mon Oct 07, 2024
Turbulent cascade arrests and the formation of intermediate-scale condensates
Author(s): Kolluru Venkata Kiran, Dario Vincenzi, and Rahul Pandit
Energy cascades lie at the heart of the dynamics of turbulent flows. In a recent study of turbulence in fluids with odd viscosity X. M. de Wit et al. [Nature (London) 627, 515 (2024)], the two dimensionalization of the flow at small scales leads to the arrest of the energy cascade and selection of a…
[Phys. Rev. E 110, L043101] Published Mon Oct 07, 2024
Enhanced speed of microswimmers adjacent to a rough surface
Author(s): Deming Nie, Kai Zhang, and Jianzhong Lin
Increased speed is not only the goal of human sports but also the aim we seek to achieve for artificial microswimmers. Microswimmers driven by various power mechanisms have shown unrivaled advantages in drug delivery and cancer therapy. Attaining high mobility with limited power has been a never-end…
[Phys. Rev. E 110, 045101] Published Tue Oct 01, 2024
Anomalous mass diffusion in a binary mixture and Rayleigh-Bénard instability
Author(s): A. Barletta and B. Straughan
The onset of the Rayleigh-Bénard instability in a horizontal fluid layer is investigated by assuming the fluid as a binary mixture and the concentration buoyancy as the driving force. The focus of this study is on the anomalous diffusion phenomenology emerging when the mean squared displacement of m…
[Phys. Rev. E 110, 045102] Published Tue Oct 01, 2024
Inertia onset in disordered porous media flow
Author(s): Damian Śnieżek, Sahrish B. Naqvi, and Maciej Matyka
We investigate the onset of the inertial regime in the fluid flow at the pore level in three-dimensional, disordered, highly porous media. We analyze the flow structure in a wide range of Reynolds numbers starting from 0.01 up to 100. We focus on qualitative and quantitative changes that appear with…
[Phys. Rev. E 110, 045103] Published Tue Oct 01, 2024
Two-temperature thermochemical nonequilibrium model based on the coarse-grained treatment of molecular vibrational states
Author(s): Jiaqi Lv, Qizhen Hong, Xiaoyong Wang, Yifeng Huang, and Quanhua Sun
Although the high-fidelity state-to-state (StS) model accurately describes high-temperature thermochemical nonequilibrium flows, its practical application is hindered by the prohibitively high computational cost. In this paper, we develop a reduced-order model that leverages the widely used two-temp…
[Phys. Rev. E 110, 035107] Published Mon Sep 30, 2024
Mechanism of sinuous and varicose modes in electrokinetic instability
Author(s): Prateek Gupta and Supreet Singh Bahga
The flow of miscible electrolyte streams with mismatched electrical conductivities in the presence of a parallel applied electric field is known to exhibit electrokinetic instability (EKI). This paper deals with EKI in a configuration where the base state is established by electro-osmotic flow (EOF)…
[Phys. Rev. E 110, 035106] Published Fri Sep 27, 2024
Percolation without trapping: How Ostwald ripening during two-phase displacement in porous media alters capillary pressure and relative permeability
Author(s): Ademola Isaac Adebimpe, Sajjad Foroughi, Branko Bijeljic, and Martin J. Blunt
Conventional measurements of two-phase flow in porous media often use completely immiscible fluids, or are performed over time scales of days to weeks. If applied to the study of gas storage and recovery, these measurements do not properly account for Ostwald ripening, significantly overestimating t…
[Phys. Rev. E 110, 035105] Published Thu Sep 26, 2024
Long-time emergent dynamics of liquid films undergoing thermocapillary instability
Author(s): Steven A. Kedda, Michael C. Dallaston, and Scott W. McCue
The study of viscous thin film flow has led to the development of highly nonlinear partial differential equations that model how the evolution of the film height is affected by different forces. We investigate a model of interaction between surface tension and the thermocapillary Marangoni effect, w…
[Phys. Rev. E 110, 035104] Published Thu Sep 05, 2024
Steric effect induces enhancement of electroconvective flow near electrochemical interfaces
Author(s): Qing Chen, Hehua Zhu, Peng Wang, and Wei Liu
Electroconvection, occurring near electrochemical interfaces, propels the movement of ions and water, leading to intricate phenomena rooted in the fine interplay between fluid, voltage, and ion. Here, neglecting ionic interactions, by incorporating the steric term into the Poisson-Nernst-Planck-Stok…
[Phys. Rev. E 110, 035101] Published Tue Sep 03, 2024
Critical dimension for hydrodynamic turbulence
Author(s): Mahendra K. Verma
Hydrodynamic turbulence exhibits nonequilibrium behavior with k−5/3 energy spectrum, and equilibrium behavior with kd−1 energy spectrum and zero viscosity, where d is the space dimension. Using recursive renormalization group in Craya-Herring basis, we show that the nonequilibrium solution is valid …
[Phys. Rev. E 110, 035102] Published Tue Sep 03, 2024
From hydrodynamics to dipolar colloids: Modeling complex interactions and self-organization with generalized potentials
Author(s): T. J. J. M. van Overveld, W. G. Ellenbroek, J. M. Meijer, H. J. H. Clercx, and M. Duran-Matute
The self-organization of clusters of particles is a fundamental phenomenon across various physical systems, including hydrodynamic and colloidal systems. One example is that of dense spherical particles submerged in a viscous fluid and subjected to horizontal oscillations. The interaction of the par…
[Phys. Rev. E 110, 035103] Published Tue Sep 03, 2024
Scaling law for a buckled elastic filament in a shear flow
Author(s): Paweł Sznajder, Piotr Zdybel, Lujia Liu, and Maria L. Ekiel-Jeżewska
We analyze the three-dimensional (3D) buckling of an elastic filament in a shear flow of a viscous fluid at low Reynolds number and high Péclet number. We apply the Euler-Bernoulli beam (elastica) theoretical model. We show the universal character of the full 3D spectral problem for a small perturba…
[Phys. Rev. E 110, 025104] Published Fri Aug 30, 2024
Lagrangian flow networks for passive dispersal: Tracers versus finite-size particles
Author(s): Deoclécio Valente, Ksenia Guseva, and Ulrike Feudel
The transport and distribution of organisms such as larvae, seeds, or litter in the ocean as well as particles in industrial flows is often approximated by a transport of tracer particles. We present a theoretical investigation to check the accuracy of this approximation by studying the transport of…
[Phys. Rev. E 110, 025103] Published Tue Aug 27, 2024
Single droplet or bubble and its stability: Kinetic theory and dynamical system approaches
Author(s): Takumu Miyauchi and Shigeru Takata
Steady solutions of a single droplet or bubble in the van der Waals fluid are investigated on the basis of the kinetic model equation that has been recently proposed by Miyauchi et al. [Gas Dynamics with Applications in Industry and Life Sciences (Springer, Cham, 2023), pp. 19–39]. Under the thermal…
[Phys. Rev. E 110, 025102] Published Wed Aug 21, 2024
Nonlinear, single-mode, two-dimensional Rayleigh-Taylor instability in ideal media
Author(s): A. R. Piriz, J. J. López Cela, S. A. Piriz, and N. A. Tahir
A model for the single mode, two-dimensional Rayleigh-Taylor instability in ideal, incompressible, immiscible, and inviscid fluids is developed as an extension of a previous linear model based on the Newton's second law [A. R. Piriz et al., Am. J. Phys. 74, 1095 (2006)]. It describes the transition…
[Phys. Rev. E 110, 025101] Published Mon Aug 19, 2024
Modified and generalized single-element Maxwell viscoelastic model
Author(s): J. S. Hansen
In this Letter, the single-element Maxwell model is generalized with respect to the wave vector and extended with a correction function that measures the reduced viscous response. This model has only two free parameters and avoids the attenuation-frequency locking present in the original model. Thro…
[Phys. Rev. E 110, L023101] Published Thu Aug 01, 2024
Directionality of gravitational and thermal diffusive transport in geologic fluid storage
Author(s): Anna L. Herring, Ruotong Huang (黄若橦), and Adrian Sheppard
Diffusive transport has implications for the long-term status of underground storage of hydrogen (H2) fuel and carbon dioxide (CO2), technologies which are being pursued to mitigate climate change and advance the energy transition. Once injected underground, CO2 and H2 will exist in multiphase fluid…
[Phys. Rev. E 110, 015106] Published Wed Jul 31, 2024