Latest papers in fluid mechanics

$α$ effect in three-dimensional vortex of conducting rotating liquid

Physical Review E - Mon, 11/25/2024 - 10:00

Author(s): L. L. Ogorodnikov and S. S. Vergeles

We study one-point statistics of helical turbulent pulsations in the background of a three-dimensional large-scale vortex in a rotating fluid. Assuming that the helical flow is created by a statistically axially symmetric random force with broken mirror symmetry, we analytically calculate the veloci…


[Phys. Rev. E 110, 055107] Published Mon Nov 25, 2024

Editorial: Introduction to the 41st Annual Gallery of Fluid Motion (Washington, DC, USA 2023)

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Rui Ni, Kartik V. Bulusu, and Azar Panah

[Phys. Rev. Fluids 9, 110002] Published Fri Nov 22, 2024

Fireworks of viscous fingering

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Chi-Chian Chou, Yuka F. Deki, Ryuta X. Suzuki, Yuichiro Nagatsu, and Ching-Yao Chen

This paper is associated with a poster winner of a 2023 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 9, 110502] Published Fri Nov 22, 2024

Formation of undulatory cavities during hydroelastic water entry

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): John T. Antolik, Jesse L. Belden, Nathan B. Speirs, and Daniel M. Harris

This paper is associated with a poster winner of a 2023 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 9, 110503] Published Fri Nov 22, 2024

Dancing drops on lubricated surfaces

Physical Review Fluids - Fri, 11/22/2024 - 10:00

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

This paper is associated with a video winner of a 2023 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 9, 110504] Published Fri Nov 22, 2024

Coat or collapse?

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Chase T. Gabbard, Edward L. Whitesell, and Joshua B. Bostwick

This paper is associated with a poster winner of a 2023 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 9, 110505] Published Fri Nov 22, 2024

Hydrodynamics of marbling art

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Yue Sun, John W. M. Bush, Saverio E. Spagnolie, and Chris H. Rycroft

This paper is associated with a video winner of a 2023 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.2023…



[Phys. Rev. Fluids 9, 110506] Published Fri Nov 22, 2024

<b>High-speed and infrared imaging of frost propagation on breath figures</b>

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): David Paulovics, Christophe Raufaste, Thomas Frisch, Cyrille Claudet, and Franck Celestini

This paper is associated with a video winner of a 2023 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.2023…



[Phys. Rev. Fluids 9, 110507] Published Fri Nov 22, 2024

High-fidelity simulations of submerged turbulence interacting with a free surface

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Andre Calado and Elias Balaras

This paper is associated with a poster winner of a 2023 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 9, 110508] Published Fri Nov 22, 2024

Eel-like robot swims more efficiently with increasing joint amplitudes compared to constant joint amplitudes

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Alexandros Anastasiadis, Annalisa Rossi, Laura Paez, Kamilo Melo, Eric D. Tytell, Auke J. Ijspeert, and Karen Mulleners

This paper is associated with a video winner of a 2023 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 9, 110509] Published Fri Nov 22, 2024

Lab icebergs melt down and flip out

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Bobae Johnson, Zihan Zhang, Alison Kim, Scott Weady, and Leif Ristroph

This paper is associated with a poster winner of a 2023 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 9, 110510] Published Fri Nov 22, 2024

Liquid lace: Regular pattern formation by under-extrusion

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Lauren Dreier, Tom Marzin, Romain David, Stephane Pienaar, Aman Eujayl, Raphael Vogeley, Yuchen Xi, and P.-T. Brun

This paper is associated with a video winner of the 2023 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.20…



[Phys. Rev. Fluids 9, 110512] Published Fri Nov 22, 2024

Visualization and feature tracking of the atomization of impinging jets

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Evan Pruitt, William Markiewicz, Carlos Gonzalez, and Xiaofeng Liu

This paper is associated with a video winner of a 2023 American Physical Society's Division of Fluids 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 9, 110513] Published Fri Nov 22, 2024

Drop Medusa: Direct numerical simulations of high-frequency Faraday waves on spherical drops

Physical Review Fluids - Fri, 11/22/2024 - 10:00

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

This paper is associated with a poster winner of a 2023 American Physical Society Division of Fluid Dynamics (DFD) Milton Van Dyke Award for the 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.…



[Phys. Rev. Fluids 9, 110514] Published Fri Nov 22, 2024

Droplet impact on solid substrates with varying hydrophobic contact angles

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Ziqiang Ma, Wanqiu Zhang, and Xinping Zhou

When droplets impact solid surfaces with different contact angles, different types of jets are produced. The atomized jet is observed in the low-speed and small-contact-angle region. The atomized jet produces droplets of smaller sizes and faster velocities compared to other jet types.


[Phys. Rev. Fluids 9, 113603] Published Fri Nov 22, 2024

Alignment-induced depression and shear thinning in granular matter of nonspherical particles

Physical Review Fluids - Fri, 11/22/2024 - 10:00

Author(s): Huzaif Rahim, Vasileios Angelidakis, Thorsten Pöschel, and Sudeshna Roy

Shearing shape-anisotropic grains in a split-bottom shear cell form a localized shear band with a depression at its center. Our study reveals how particle alignment affects the packing density, stress distribution, macro-friction, viscosity, and shear-thinning behavior with the increase in the aspect ratio of the particles. A scaling law correlates the particle aspect ratio to macroscopic friction and effective viscosity, revealing shear-thinning behavior in the bulk and near the surface.


[Phys. Rev. Fluids 9, 114304] Published Fri Nov 22, 2024

Rigid and deformable bodies in nematic liquid crystals

Physical Review Fluids - Wed, 11/20/2024 - 10:00

Author(s): Thomas G. J. Chandler and Saverio E. Spagnolie

A nematic liquid crystal, a phase of matter composed of rod-like molecules, exhibits a tendency towards uniform molecular alignment. Bodies inserted into such a fluid can disturb this orientational order, resulting in elastic stresses in the bulk fluid, which may be relaxed by body repositioning or deformation. We review classical work on rigid particles and their interactions in nematic liquid crystals, and more recent work on the shapes and interactions of deformable bodies in this complex fluid medium.


[Phys. Rev. Fluids 9, 110511] Published Wed Nov 20, 2024

Experimental study on the flickering and pinch-off of jet diffusion flames

Physical Review Fluids - Wed, 11/20/2024 - 10:00

Author(s): Haodong Zhang, Yifan Yang, Linye Li, Yang Lin, Fei Qi, and Xi Xia

Pinch-off of premixed flames typically results from flame extinction induced by aerodynamic strain. However, for a jet diffusion flame, we find the strain effect to be secondary. Instead, pinch-off is initiated by an insufficient fuel supply to the reaction region, as a result of outward fuel diffusion overwhelmed by inward convection. This competition of transport effects inspires the definition of a characteristic Peclet number as the pinch-off criterion.


[Phys. Rev. Fluids 9, 113202] Published Wed Nov 20, 2024

Momentum deficit and wake-added turbulence kinetic energy budgets in the stratified atmospheric boundary layer

Physical Review Fluids - Wed, 11/20/2024 - 10:00

Author(s): Kerry S. Klemmer and Michael F. Howland

As wind turbines increase in scale and are deployed in diverse atmospheric conditions, understanding wake dynamics in stratified atmospheric boundary layers becomes critical. This study uses large eddy simulations to analyze the mechanisms that govern wake momentum deficit and added turbulence kinetic energy transport in stable and neutral atmospheric boundary layers. Findings reveal that dynamics are strongly influenced by effects of stratification on the atmospheric inflow, rather than buoyant forcing, and the dependence of wake-added turbulence on stability. These insights can guide new models that better predict wakes across conditions, contributing to more efficient wind power.


[Phys. Rev. Fluids 9, 114607] Published Wed Nov 20, 2024

Local precursors to anomalous dissipation in Navier-Stokes turbulence: Burgers vortex-type models and simulation analysis

Physical Review Fluids - Wed, 11/20/2024 - 10:00

Author(s): Georgy Zinchenko, Vladyslav Pushenko, and Jörg Schumacher

Anomalous dissipation in turbulence is a dissipation mechanism of kinetic energy that is independent of fluid viscosity; this mechanism requires sufficiently rough velocity fields at high Reynolds numbers. Our study links this statistical behavior to fundamental vortex stretching mechanisms, exploring both, classical kinematic Burgers vortex models and simulations of three-dimensional box turbulence. We identify intense vortex structures in turbulence as key contributors to anomalous dissipation, offering insights into the underlying dynamics of energy transfer in turbulent flows.


[Phys. Rev. Fluids 9, 114608] Published Wed Nov 20, 2024

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