Physical Review E

Author(s): Akira Yoshimori and Shankar P. Das

We obtain the equations of fluctuating hydrodynamics for many-particle systems whose microscopic units have both translational and rotational motion. The orientational dynamics of each element are studied in terms of Langevin equations for the rotational motion of a corresponding fixed-length direct…

[Phys. Rev. E 112, 045101] Published Wed Oct 01, 2025

Author(s): Berin Šeta, Jon Spangenberg, Mounir M. Bou-Ali, and Valentina Shevtsova

Ternary systems driven by concentration-dependent diffusion coefficients were studied aboard the International Space Station. A range of new patterning possibilities and the coexistence of gravitational instabilities, previously thought impossible in nonreactive systems, were uncovered.

#ClearMotivation #ElegantVisuals

[Phys. Rev. E 112, L033101] Published Thu Sep 25, 2025

Author(s): Shibo Lee, Chenglin Zhou, Yang Zhang, Yunlong Zhao, Jiaqi Luo, and Yao Zheng

Direct numerical simulation is utilized to resolve the drag and turbulent characteristics of supersonic fully developed channel turbulence in this paper. Distinct from spatially developing turbulence, a relaxation of the skin friction coefficient is discovered after blowing in fully developed turbul…

[Phys. Rev. E 112, 035104] Published Tue Sep 23, 2025

Author(s): Zhiqian Xin, Jiadong Wang, Xingyuan Mao, Bowen Jin, and Jian Deng

This study investigates the influence of varying degrees of freedom (DOFs) on the swimming performance of self-propelled undulatory swimmers navigating a straight path in three flow configurations: an unbounded fluid, near a solid wall, and in a side-by-side arrangement. Vertical and rotational DOFs…

[Phys. Rev. E 112, 035103] Published Fri Sep 19, 2025

Author(s): Yu-Chen Zang (臧雨宸), Hai-Feng Jiang (蒋海峰), Di-Chao Chen (陈帝超), Xing-Feng Zhu (朱兴凤), and Da-Jian Wu (吴大建)

A rigorous formalism is presented for the time-averaged acoustic radiation force on a spherical particle near an infinite planar boundary subjected to a plane wave. The background medium is assumed to be a weakly thermoviscous fluid, with the viscous and thermal boundary layers much smaller than eit…

[Phys. Rev. E 112, 035101] Published Tue Sep 02, 2025

Author(s): Xiaoyu Wu and Xian Wang

In this work, an improved Allen-Cahn-based phase-field lattice Boltzmann model is presented which is applicable to heat transfer in two-phase flow involving evaporation. The vapor concentration at the liquid-vapor interface serves as the driving force for vaporization. In our improved model, four di…

[Phys. Rev. E 112, 035102] Published Tue Sep 02, 2025

Author(s): Chung-Hao Chen, Zong-Rou Jiang, and Tzay-Ming Hong

The process of producing a liquid column is common in daily life and industrial applications, such as walking through a puddle and roller printing. While governed by the Navier-Stokes equation, its dynamics are often studied by numerical means, which hinders a full understanding of the rich mixture …

[Phys. Rev. E 112, 025105] Published Mon Aug 25, 2025

Author(s): Zhiwei Song and Zijing Ding

This study develops a weighted-residual model for Oldroyd-B films on slippery substrates at moderate Reynolds number and large slippery length. Linear stability analysis reveals that wall slip promotes perturbation growth rates, increases cut-off wave numbers, and accelerates long-wave propagation s…

[Phys. Rev. E 112, 025106] Published Mon Aug 25, 2025

Author(s): Ryuta X. Suzuki, Takahiko Ban, Manoranjan Mishra, and Yuichiro Nagatsu

The displacement of a viscous fluid by another less-viscous fluid in porous media or Hele-Shaw cells produces a fingerlike interfacial pattern known as viscous fingering (VF). Classically, the dynamics of VF have been divided into two categories depending on whether the two fluids are fully miscible…

[Phys. Rev. E 112, 025104] Published Tue Aug 12, 2025

Author(s): Brandon E. Morgan

A common approach to closing turbulent species flux in multicomponent Reynolds-averaged Navier-Stokes models is to use the standard gradient diffusion approximation. While such an approach has been shown to work well when applied to many canonical turbulent mixing configurations, a gradient diffusio…

[Phys. Rev. E 112, 025103] Published Mon Aug 11, 2025

Author(s): Enrico Corato, David van Assche, Ola Jakobsson, Wei Qiu, and Per Augustsson

Thermoacoustic effects arise when a temperature gradient is present in a sound field. This work investigates the interplay of orthogonal sound and thermal fields in a water-filled microchannel. We measured the three-dimensional streaming in the water-filled cavity for only sound applied, for only th…

[Phys. Rev. E 112, 025102] Published Mon Aug 04, 2025

Author(s): Azeddine Zaidni and Philip J. Morrison

A unified thermodynamic algorithm is presented for constructing thermodynamically consistent dynamical systems, i.e., systems that have Hamiltonian and dissipative parts that conserve energy while producing entropy. The algorithm is based on the metriplectic 4-bracket given in Morrison and Updike [P…

[Phys. Rev. E 112, 025101] Published Fri Aug 01, 2025

Author(s): Andrej Vilfan, Bogdan Cichocki, and Jeffrey C. Everts

We study the hydrodynamic drag force exerted on a sphere in a static anisotropic porous medium. This problem is analyzed using the Brinkman-Debye-Bueche equations with an axisymmetric shielding (or permeability) tensor. Using the exact Green's functions for this model fluid within a single-layer bou…

[Phys. Rev. E 112, 015107] Published Mon Jul 28, 2025

Author(s): S. A. Piriz, A. R. Piriz, and N. A. Tahir

A quasi-irrotational approximation is used to calculate the growth rate of the Rayleigh-Taylor instability in uniformly accelerated elastic or viscous layers, which, in addition to the unstable interface, also have a free surface. The approximation yields simple and analytical expressions for the gr…

[Phys. Rev. E 112, 015105] Published Wed Jul 23, 2025

Author(s): Amal Manoharan, Sai Subramanian, and Ashwin Joy

Deformation of material lines drives transport and dissipation in many industrial and natural flows. Here, we report an exact Eulerian formula for the stretching rate of a material line, also known as the topological entropy, in a prototype two-dimensional fluid. The only requirement is a distributi…

[Phys. Rev. E 112, 015106] Published Wed Jul 23, 2025

Author(s): I. Abushzada, E. Yushkov, P. Frick, and D. Sokoloff

By combining two approaches, the shell magnetohydrodynamic model and the Kazantsev-Kraichnan formulation, the authors advance the theory of the turbulent kinetic dynamo, obtaining results of interest for plasma physics, hydrodynamics, astrophysics, and turbulence theory.

#TechnicalAdvancement #WellStructured

[Phys. Rev. E 112, 015104] Published Tue Jul 22, 2025

Author(s): Shun-Jie Wu, Rong-Rong Cai, and Li-Zhi Zhang

Particle aggregation plays a crucial role in determining the performance of nanofluids. A particle-scale understanding of nanoparticle dynamics and aggregation behavior is a prerequisite for accurately characterizing their functionality. In this study, the complex factors affecting nanoparticle aggr…

[Phys. Rev. E 112, 015103] Published Fri Jul 11, 2025

Author(s): Zhenze Yao, Mengqi Zhang, Jian Wu, Kang Luo, and Hongliang Yi

The convective and absolute instabilities in electrohydrodynamic-Poiseuille mixed convection for viscoelastic fluids with the Oldroyd-B model are examined. In the absence of Poiseuille flow, based on the stationary and oscillatory characteristics at the onset of convection, we distinguish weakly and…

[Phys. Rev. E 112, 015102] Published Tue Jul 08, 2025

Author(s): Yves-Marie Ducimetière and François Gallaire

Some fluid flows are difficult to describe mathematically because their response to an external perturbation cannot be reduced to a small number of eigenmodes. The authors propose a method to approach these systems that is based on a few singular modes that are sufficient to reconstruct the response to leading order. The method is shown to greatly reduce the numerical cost compared to existing approaches.

#AdvancingField #TechnicalAdvancement

[Phys. Rev. E 112, 015101] Published Wed Jul 02, 2025

Author(s): Shigeru Takata and Aoto Takahashi

A modification of the original Enskog equation, which is different from the so-called modified (or revised) Enskog equation, is proposed. The modification changes the correlation factor from a function of density to a functional of density in a simple form without series structure. The present modif…

[Phys. Rev. E 111, 065108] Published Mon Jun 30, 2025