Physical Review E
Microswimmer locomotion and hydrodynamics in Brinkman flows
Author(s): Francisca Guzmán-Lastra and Enkeleida Lushi
Microswimmer locomotion in heterogeneous media is increasingly relevant in biological physics due to the prevalence of microorganisms in complex environments. A model for such porous media is the Brinkman fluid, which accounts for a sparse matrix of stationary obstacles via a linear resistance term …
[Phys. Rev. E 112, 055110] Published Tue Nov 18, 2025
Stochastic model for mixing interface evolution through three-dimensional fracture networks
Author(s): Daniel M. C. Hallack, Diogo Bolster, Jeffrey D. Hyman, Matthew R. Sweeney, and Hari S. Viswanathan
We study effective mixing behavior of solutes in steady flows through three-dimensional random fracture networks and find that mixing in these systems is characterized by phenomena distinct from continuous porous media. Network-scale heterogeneity leads to the complex spatio-temporal organization of…
[Phys. Rev. E 112, 055111] Published Tue Nov 18, 2025
Synthetic turbulence via an instanton gas approximation
Author(s): Timo Schorlepp, Katharina Kormann, Jeremiah Lübke, Tobias Schäfer, and Rainer Grauer
Sampling synthetic turbulent fields as a computationally tractable surrogate for direct numerical simulations (DNS) is an important practical problem in various applications, and allows us to test our physical understanding of the main features of real turbulent flows. Reproducing higher-order Euler…
[Phys. Rev. E 112, 055108] Published Mon Nov 17, 2025
Motion of an ellipsoidal particle in shear flow: Analyzing memory effect influence through exact solutions investigation
Author(s): Elhoussine Azroul and Ghizlane Diki
This study introduces an approach to extend the Keller and Skalak (KS) theory by integrating the modified Riemann-Liouville fractional derivative. Our focus is on investigating the transition of red blood cells from flipping to stationary motion within shear flows. Expanding upon the predictions out…
[Phys. Rev. E 112, 055109] Published Mon Nov 17, 2025
Correlated internal waves in the nonlocal Ostrovsky equation
Author(s): Junchao Sun, Xiaoyan Tang, and Yong Chen
We derive a nonlocal Ostrovsky equation to describe two internal waves generated at distinct locations and times, together with their correlations and interactions. When the initial conditions are P̂T̂ symmetry invariant, the internal waves can either exhibit cnoidal wave structures that are largely…
[Phys. Rev. E 112, 055104] Published Wed Nov 12, 2025
Characterizing the Reynolds number dependence of the chaotic attractor in two-dimensional turbulence with dimension-minimizing autoencoders
Author(s): Andrew Cleary and Jacob Page
Deep autoencoder neural networks can generate highly accurate, low-order representations of turbulence. We design a family of autoencoders which are a combination of a “dense-block” encoder-decoder structure [Page et al., J. Fluid Mech. 991, A10 (2024)], an "implicit rank minimization" series of lin…
[Phys. Rev. E 112, 055105] Published Wed Nov 12, 2025
Taylor dispersion in an oscillatory squeeze flow of an Oldroyd-B fluid between hydrophobic disks
Author(s): G. Mederos, J. Arcos, O. Bautista, and F. Méndez
We investigate the Taylor-Aris dispersion resulting from oscillatory squeeze flow (OSF) of an Oldroyd-B viscoelastic fluid in the gap between two hydrophobic disks. The slippage between the fluid and the surfaces of both disks is modeled using a dynamic slip boundary condition, which accounts for pe…
[Phys. Rev. E 112, 055106] Published Wed Nov 12, 2025
Tunneling of walking oil drops
Author(s): Mogens T. Levinsen
Walkers are oil drops surfing on a vibrated oil surface and driven by their self-generated capillary waves. Since some of the first measurements on walkers seemingly showed quantum-like behavior, walkers have been considered a model system for a hydrodynamic pilot-wave system. An early experiment sh…
[Phys. Rev. E 112, 055107] Published Wed Nov 12, 2025