Latest papers in fluid mechanics
$α$ effect in three-dimensional vortex of conducting rotating liquid
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)
Author(s): Rui Ni, Kartik V. Bulusu, and Azar Panah
[Phys. Rev. Fluids 9, 110002] Published Fri Nov 22, 2024
Fireworks of viscous fingering
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
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
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?
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
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>
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
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
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
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
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
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
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
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
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
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
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
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
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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