Physical Review E
Analysis of instantaneous skin friction in a supersonic turbulent boundary layer
Author(s): Rongji Hu, Zhikang Huang, Geng Zhao, Xue-Lu Xiong, Feng Liu, Jian Fang, and Yi Zhou
The generation of skin friction in a spatially evolving turbulent boundary layer at a Mach number Ma∞=2.9 is analyzed using direct numerical simulation (DNS). Particular attention is paid to clarifying the impact of the turbulent/nonturbulent interface (TNTI) height on the skin friction. In contrast…
[Phys. Rev. E 113, 045102] Published Tue Apr 07, 2026
Comprehensive interscale energy transfer in homogeneous isotropic turbulence
Author(s): Jun-Yang Li, Dong Sun, Si-Wei Dong, Peng-Xin Liu, and Xian-Xu Yuan
This study examines interscale energy transfer, conventionally denoted as the “energy cascade,” in forced homogeneous isotropic turbulence. By employing spatial filtering techniques, the turbulent kinetic energy is decomposed into distinct large- and small-scale components, as well as local- and sub…
[Phys. Rev. E 113, 045101] Published Wed Apr 01, 2026
Topological entropy of stationary three-dimensional turbulence
Author(s): Ankan Biswas, Amal Manoharan, and Ashwin Joy
Topological entropy serves as a viable candidate for quantifying mixing and complexity of a highly chaotic system. Particularly in turbulence, this is determined as the exponential stretching rate of a fluid material line that typically necessitates a Lagrangian description. We extend our recent wor…
[Phys. Rev. E 113, 035107] Published Mon Mar 30, 2026
Re-examining the boundary conditions in modeling surface-acoustic-wave-driven acoustofluidic streaming
Author(s): Qinran Wei, Suyu Ding, Yang Zhao, Yuanpeng Ma, Dachuan Sang, Dong Zhang, and Xiasheng Guo
Numerical simulations of surface acoustic wave (SAW)-induced acoustic streaming are highly sensitive to the choice of second-order boundary conditions. This study systematically compares the no-slip (NS) and Stokes slip (SD) boundary conditions through different numerical approaches. Two- and three-…
[Phys. Rev. E 113, 035105] Published Wed Mar 25, 2026
Quantum potential from the material derivative of the osmotic velocity: A two-fluid Madelung framework
Author(s): Lachezar S. Simeonov
We derive the quantum potential directly from the material derivative of the osmotic velocity and formulate a two-fluid model that reproduces the Madelung equations. Interactions between the two fluids are included but remain secondary. The framework is generalized to incorporate electromagnetic fie…
[Phys. Rev. E 113, 035106] Published Wed Mar 25, 2026
Suppressing viscous fingering with rotation: Linear predictions and nonlinear simulations
Author(s): Írio M. Coutinho and José A. Miranda
In this work, we investigate the possibility of suppressing injection-driven, viscous fingering instabilities in a radial Hele-Shaw cell, via the action of centrifugal forces. We consider the situation in which an inviscid fluid of negligible density is injected into a viscous and denser one, while …
[Phys. Rev. E 113, 035103] Published Tue Mar 24, 2026
Flexible fiber studied in fluid flow using a variational method
Author(s): Haoyu Liu, Edidiong Michael Umana, and Xiufeng Yang
The interaction between flexible bodies and fluids is very complex, however, studying this mechanism helps us understand how natural plants deform in response to fluid flow to prevent structural damage. Due to the complexity of fluid-structure interaction, there is a lack of methods for quickly and …
[Phys. Rev. E 113, 035104] Published Tue Mar 24, 2026
Invasion of a magnetic-bead-laden droplet placed over a hole in the presence of a magnetic field
Author(s): Ting Zhong, Gaoxiao Jiang, Rui Ma, and Chenxu Wu
How a magnetic-bead-laden droplet is manipulated by a magnetic field remains a challenging topic of quantitative investigation. In this paper, we propose a theoretical model to investigate the equilibrium states of a magnetic-bead-laden droplet placed over either a bottomed superhydrophobic cylindri…
[Phys. Rev. E 113, 035102] Published Wed Mar 11, 2026