New Papers in Fluid Mechanics

Author(s): Shūji Ōtomo (大友衆示), Anna M. Young, Edward D. McCarthy, and Ignazio Maria Viola

How much can a passively deforming trailing-edge alleviate unsteady aerodynamic loads, and which dimensionless numbers govern the deflection and load alleviation? This paper experimentally investigates the unsteady load alleviation of plunging airfoils with a passively deforming trailing-edge. We show that both the deflection amplitude and unsteady load alleviation scale with the product of two Cauchy numbers, or dimensionless flexibilities, one based on the freestream velocity, and the other on the plunging velocity.

[Phys. Rev. Fluids 10, 114102] Published Mon Nov 24, 2025

Author(s): Gregory Holba, James P. Hague, Nigel Hoggard, and Marc Pradas

When cerebrospinal fluid (CSF) flow in human brains is disrupted, glymphatic waste clearance is jeopardized, which could lead to neurodegenerative conditions, such as dementia. We explore CSF flow in the tiny spaces that surround brain penetrating arteries by modelling the interaction between blood pressure waves and the arterial wall, and postulate a brain pulsation driver. It is shown that flow is highly dependent on the localized anatomical characteristics and brain pulsations significantly magnify such flows. Clinical implications are discussed.

[Phys. Rev. Fluids 10, 113103] Published Fri Nov 21, 2025

Author(s): Daniel Maynes, Julie Crockett, Brian Iverson, Nathan Speirs, and Azar Panah

[Phys. Rev. Fluids 10, 110001] Published Thu Nov 20, 2025

Author(s): Sandip Dighe, Hrishikesh Gadgil, and Tadd Truscott

This paper is associated with a poster winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.20…

[Phys. Rev. Fluids 10, 110501] Published Thu Nov 20, 2025

Author(s): Kari Perry and Sarah Morris

This paper is associated with a poster winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Milton Van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.20…

[Phys. Rev. Fluids 10, 110502] Published Thu Nov 20, 2025

Author(s): Adrián Antón-Álvarez and Adrián Lozano-Durán

This paper is associated with a poster winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.20…

[Phys. Rev. Fluids 10, 110503] Published Thu Nov 20, 2025

Author(s): Karoline-Marie Bornemann and Dominik Obrist

This paper is associated with a video winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Gallery of Fluid Motion Award for work presented at the DFD Gallery of Fluid Motion. The original video is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.…

[Phys. Rev. Fluids 10, 110504] Published Thu Nov 20, 2025

Author(s): Jerric R. Delfin, Nozomu Hashimoto, and Osamu Fujita

This paper is associated with a video winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Gallery of Fluid Motion Award for work presented at the DFD Gallery of Fluid Motion. The original video is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.…

[Phys. Rev. Fluids 10, 110505] Published Thu Nov 20, 2025

Author(s): Simone Di Giorgio, Alessandro Iafrati, Sergio Pirozzoli, Francesco Zonta, and Alfredo Soldati

This paper is associated with a video winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original video is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.2024…

[Phys. Rev. Fluids 10, 110506] Published Thu Nov 20, 2025

Author(s): Jian H. Guan, Saiful I. Tamim, Connor W. Magoon, Howard A. Stone, and Pedro J. Sáenz

This paper is associated with a video winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Gallery of Fluid Motion Award for work presented at the DFD Gallery of Fluid Motion. The original video is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.…

[Phys. Rev. Fluids 10, 110507] Published Thu Nov 20, 2025

Author(s): Pim J. Dekker, Christian Diddens, and Detlef Lohse

This paper is associated with a video winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original video is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.2024…

[Phys. Rev. Fluids 10, 110508] Published Thu Nov 20, 2025

Author(s): Marcus Lin, Fauzia Wardani, and Dan Daniel

This paper is associated with a video winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original video is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.2024…

[Phys. Rev. Fluids 10, 110509] Published Thu Nov 20, 2025

Author(s): Umang N. Patel, Jonathan P. Rothstein, and Yahya Modarres-Sadeghi

This paper is associated with a poster winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Gallery of Fluid Motion Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/AP…

[Phys. Rev. Fluids 10, 110510] Published Thu Nov 20, 2025

Author(s): L. Kahouadji, M. Shams, D. Panda, A. M. Abdal, S. Shin, J. Chergui, D. Juric, and O. K. Matar

This paper is associated with a poster winner of a 2024 American Physical Society's Division of Fluid Dynamics (DFD) Gallery of Fluid Motion Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available online at the Gallery of Fluid Motion, https://doi.org/10.1103/AP…

[Phys. Rev. Fluids 10, 110511] Published Thu Nov 20, 2025

Author(s): Ilya Kolesnichenko and Vladimir Ozernykh

This study examines the parameter region in which a solitary rotating vortex can form in an axial liquid metal flow. For different ratios of azimuthal and axial flow intensities, the flow pattern changes significantly. At high intensity of the axial flow the second vortex is completely suppressed by the first vortex. The rotating vortex has clear-cut boundaries. In the flow regions before and after the vortex generation, the vorticity is close to zero. After switching off electromagnetic forces, the vortex is carried by the axial flow along the channel.

[Phys. Rev. Fluids 10, 113701] Published Thu Nov 20, 2025

Author(s): Clara M. Velte and Preben Buchhave

The omission of time as a parameter in the classical triad interaction analysis is shown to produce a much too simplistic picture of turbulence. Including time into the analysis shows that not only the spatial wave overlap contributes to energy exchanges between wavenumbers, but the temporal overlap is equally important. The phase match condition is thus broadened to also include temporal frequencies. This can explain much of so-called nonequilibrium turbulence. Not least fractal grid generated turbulence, which is a prime example of these effects. Part II investigates the effects on triadic analysis of practical signals with finite temporal and spatial domains and resolutions.

[Phys. Rev. Fluids 10, 114612] Published Thu Nov 20, 2025

Author(s): Preben Buchhave and Clara M. Velte

The inclusion of time as a parameter omitted in the classical triad interaction analysis was introduced in the companion paper Part I. The present work illustrates the effects of practical sampling on the resulting triad interactions. Practical sampling effects include both temporal and spatial digitization (sampling) as well as finite temporal and spatial domains. These effects are seen to broaden the interaction peaks beyond the classically expected delta-functions and the finite domains contribute to a more complex interaction evolution for domains sufficiently small in comparison to the largest scales in the flow under investigation.

[Phys. Rev. Fluids 10, 114613] Published Thu Nov 20, 2025

Author(s): Lekha Sharma, Mayank Pathak, Harshit Tiwari, and Mahendra K. Verma

We investigate the influence of Prandtl number (Pr) on turbulent compressible convection by performing extensive numerical simulations in both two- and three-dimensions. We find that the bulk remains adiabatic across all Pr, while the global heat and momentum transport exhibits scalings similar to the incompressible Rayleigh-Bénard convection (RBC). In contrast, the boundary layers exhibit distinct scalings near the top and bottom boundaries, unlike RBC, accounting the effects of compressibility. The key image shows the flow structures at two different Pr’s.

[Phys. Rev. Fluids 10, 114611] Published Wed Nov 19, 2025

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

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