Physical Review E

Author(s): Martina Luise, Nicola Sansonetto, and Simone Zuccher

We investigate the reconnection process involving a quantum vortex ring colliding at different angles with a quantum straight vortex line. The dynamics of this phenomenon is well described by the Gross-Pitaevskii equation. Two families of initial configurations are explored, one by varying the angle…

[Phys. Rev. E 114, 035106] Published Fri Sep 18, 2026

Author(s): Anna Luiza M. B. Mattos, Rafael M. Oliveira, Pedro H. A. Anjos, and Eduardo O. Dias

Viscous fingering instabilities reduce the efficiency of immiscible displacement processes in radial Hele-Shaw flows. Time-dependent injection protocols provide a practical means of mitigating these instabilities, and previous studies have shown that linearly increasing injection rates can strongly …

[Phys. Rev. E 114, 035105] Published Thu Sep 10, 2026

Author(s): Mingming Gu, Zilong Deng, and Yongping Chen

For gas mixtures flowing through conical capillaries with small feature sizes, intermolecular collisions compete with ballistic transport. This leads to discrepancies between real flow rates and predicted results by conventional hydraulic methods. A model is established to calculate the flow rates o…

[Phys. Rev. E 114, 035103] Published Tue Sep 08, 2026

Author(s): Ademola Isaac Adebimpe, Sajjad Foroughi, Branko Bijeljic, and Martin J. Blunt

We present a time-dependent pore-network model that couples transient mass transfer in the aqueous phase, capillary pressure heterogeneity, and realistic pore-throat geometries to capture the dynamic evolution of gas clusters during Ostwald ripening in porous media. The model is applied to Bentheime…

[Phys. Rev. E 114, 035104] Published Tue Sep 08, 2026

Author(s): Daniela Dávalos Ruedas, R. E. Moctezuma, and J. Rodrigo Vélez-Cordero

Theoretical expressions used to study the assembly of magnetic particles under the action of external magnetic fields are generalized to incorporate carrier fluids with varying viscosity (shear thinning fluids). The theory is essentially local, and the drag force assigned to each particle considers …

[Phys. Rev. E 114, 035102] Published Wed Sep 02, 2026

Author(s): Vladimir Rosenhaus and Daniel Schubring

We study wave turbulence in systems with two special properties: a large number of fields (large N) and a nonlinear interaction that is strongly local in momentum space. The first property allows us to find the kinetic equation at all interaction strengths—both weak and strong, at leading order in 1…

[Phys. Rev. E 114, 035101] Published Tue Sep 01, 2026

Author(s): Smiron Varghese, Benjamin Miquel, and Wouter J. T. Bos

We present an analytical investigation of the global helicity budget associated with the salt-fingering instability within the two-dimensional, three-component framework. Our analysis shows that in the region of parameter space corresponding to salt fingering, helicity amplification occurs when the …

[Phys. Rev. E 114, L023101] Published Thu Aug 27, 2026

Author(s): Mehdi Riahi and Mohamed Hayani Choujaa

Previous studies dealing with Floquet stability analysis of non-zero-mean time-modulated Rayleigh-Bénard convection have shown the existence of only harmonic and subharmonic instability modes. Here, we emphasize the existence of quasiperiodic instabilities that have not yet been reported in the lite…

[Phys. Rev. E 114, 025108] Published Mon Aug 24, 2026

Author(s): Chien-Chia Liu and Jui-Yin Lin

Wall roughness plays a central role in determining turbulent friction in pipe flows, yet most predictive frameworks continue to characterize the wall by a single effective roughness scale. Classical datasets—notably Nikuradse's sand-grain experiments and the rough-pipe measurements of Colebrook and …

[Phys. Rev. E 114, 025109] Published Mon Aug 24, 2026

Author(s): John L. Spiesberger and Eugene Terray

A theory inspired by whale tracking suggests that wave interference can make energy travel faster than light.

[Phys. Rev. E 114, 025107] Published Tue Aug 18, 2026

Author(s): Tianquan Tang, Mengjie Wu, and Lixi Huang

The theory of using transducer arrays for the contactless and stable manipulation of Rayleigh objects (ka≪1, where k is the wave number and a is the averaged radius of object) is well established, whereas retrieving the transducer parameters required for the stable and dynamic manipulation of Mie ob…

[Phys. Rev. E 114, 025106] Published Mon Aug 17, 2026

Author(s): Vikas S. Krishnamurthy and Takashi Sakajo

The stationary equilibria of N point vortices in a rectangular domain with doubly periodic boundary conditions offer a foundational framework for understanding the stationary lattices of coherent vortex structures. In this paper, we obtain new continuous families of these lattices. These solutions a…

[Phys. Rev. E 114, 025105] Published Thu Aug 13, 2026

Author(s): Conan M. Liptrott, Sandra C. Chapman, Bogdan Hnat, and Nicholas W. Watkins

A scale-by-scale analysis of energy flux in the turbulent cascade can be performed using the spatially filtered magnetohydrodynamic (MHD) equations, while the gradient tensor invariants are widely used to characterize the structure of velocity and magnetic fields. Physical mechanisms responsible for…

[Phys. Rev. E 114, 025102] Published Mon Aug 10, 2026

Author(s): Radha S, Swarup Barik, and Sourav Hossain

This study presents an analytical solution of the two-dimensional concentration distribution of a contaminant in a channel with a prismatic cross-section and asymmetric velocity distribution, influenced by reversible and irreversible reactions, along with the bulk chemical reaction. Recent works by …

[Phys. Rev. E 114, 025103] Published Mon Aug 10, 2026

Author(s): Yuxing Jiao and Mingcheng Yang

Odd fluids are a class of fluids characterized by nonzero antisymmetric transport coefficient tensors induced by broken time-reversal symmetry. In our previous work, a mesoscale simulation model for two-dimensional isotropic odd fluids was developed. Here, we extend the model to the three-dimensiona…

[Phys. Rev. E 114, 025104] Published Mon Aug 10, 2026

Author(s): Debanik Bhattacharjee, Guy Z. Ramon, and Yaniv Edery

Capillarity-dominated two-phase displacement in porous media can continue beyond the initial invasion-percolation (IP) breakthrough when surfactants progressively modify interfacial properties and reopen pathways previously sealed by capillary barriers. We study this post-breakthrough secondary inva…

[Phys. Rev. E 114, 025101] Published Thu Aug 06, 2026

Author(s): Harshit Joshi, Amal Manoharan, and Samriddhi Sankar Ray

The significance of small-scale forcing of particles on the carrier two-dimensional turbulent flow has been shown to influence the spectral scaling properties of the carrier fluid. We investigate possible consequences of such two-way coupling in a turbulent suspension of inertial particles through o…

[Phys. Rev. E 114, 015106] Published Thu Jul 30, 2026

Author(s): Rudra Sekhri, Rahil N. Valani, and Tapio Simula

We experimentally investigate the dynamics of synthetic active particles composed of gravitationally bouncing, superwalking droplets confined within an annular fluid bath. Driven by a topologically pumping dual-frequency waveform, the droplets exhibit alternating active (walking) and dormant (bounci…

[Phys. Rev. E 114, L013103] Published Tue Jul 28, 2026

Author(s): Prabakaran Rajamanickam

A recent study [P. Rajamanickam, Q. J. Mech. Appl. Math. 78, hbaf007 (2025)] of non-Boussinesq fluids in narrow channels identified a novel shear-induced horizontal buoyancy force that emerges upon depth-averaging the Navier–Stokes equations. This Letter demonstrates that this force is formally equi…

[Phys. Rev. E 114, L013102] Published Mon Jul 27, 2026

Author(s): Morteza Dejam and Hassan Hassanzadeh

The solute transport due to mixed electro-osmotic and pressure-driven flows of viscoelastic fluids in microchannels is studied here. The Reynolds decomposition technique, in combination with the assumptions underlying the Taylor-Aris theory, is used to derive a reduced-order model that yields the di…

[Phys. Rev. E 114, 015105] Published Mon Jul 20, 2026