Physical Review E
Extremely large water droplet impact onto a deep liquid pool
Author(s): Sandip Dighe, Dilip Kumar Maity, Jeffrey N. Fonnesbeck, Som Dutta, and Tadd Truscott
Most studies of droplet impact on liquid pools focus on droplet diameters up to the capillary length (0.27 cm). We break from convention and study extremely large water droplets (1 to 6 cm diameter) falling into a pool of water. We demonstrate that the depth and width of the cavity formed by large d…
[Phys. Rev. E 109, 045107] Published Tue Apr 16, 2024
Vortex polarization and circulation statistics in isotropic turbulence
Author(s): L. Moriconi, R. M. Pereira, and V. J. Valadão
We carry out an in-depth analysis of a recently introduced vortex gas model of homogeneous and isotropic turbulence. Direct numerical simulations are used to provide a concrete physical interpretation of one of the model's constituent fields: the degree of vortex polarization. Our investigations she…
[Phys. Rev. E 109, 045106] Published Mon Apr 15, 2024
Turbulence spreading by resonant wave-wave interactions: A fractional kinetics approach
Author(s): Alexander V. Milovanov and Jens Juul Rasmussen
This paper is concerned with the processes of spatial propagation and penetration of turbulence from the regions where it is locally excited into initially laminar regions. The phenomenon has come to be known as “turbulence spreading” and witnessed a renewed attention in the literature recently. Her…
[Phys. Rev. E 109, 045105] Published Thu Apr 11, 2024
Microscopic self-dynamics in liquid Ne-${\mathrm{D}}_{2}$ mixtures: Quantum features and itinerant oscillators reexamined
Author(s): Daniele Colognesi, Ubaldo Bafile, Eleonora Guarini, and Martin Neumann
In this paper, we report the results of a centroid molecular dynamics (CMD) study of the canonical velocity autocorrelation functions (VACFs) in liquid Ne−D2 mixtures at a temperature of T=30K and in the full D2-concentration range (0%≤xD2≤100%). This binary system was selected because of its modera…
[Phys. Rev. E 109, 045104] Published Tue Apr 09, 2024
Breaking the symmetry of a wavy channel alters the route to chaotic flow
Author(s): Mohammad Hossein Doranehgard, Nader Karimi, Iman Borazjani, and Larry K. B. Li
We numerically explore the two-dimensional, incompressible, isothermal flow through a wavy channel, with a focus on how the channel geometry affects the routes to chaos at Reynolds numbers between 150 and 1000. We find that (i) the period-doubling route arises in a symmetric channel, (ii) the Ruelle…
[Phys. Rev. E 109, 045103] Published Thu Apr 04, 2024
Optimal external forces of the lock-in phenomena for flow past an inclined plate in uniform flow
Author(s): Makoto Iima
We theoretically studied the optimal control, frequency lock-in, and phase lock-in phenomena due to the spatially localized periodic forcing in flow past an inclined plate. Although frequency lock-in is evident in many fluid phenomena, especially fluid-structure interactions, not many researchers ha…
[Phys. Rev. E 109, 045102] Published Tue Apr 02, 2024
Connecting finite-time Lyapunov exponents with supersaturation and droplet dynamics in a turbulent bulk flow
Author(s): Vladyslav Pushenko and Jörg Schumacher
The impact of turbulent mixing on an ensemble of initially monodisperse water droplets is studied in a turbulent bulk that serves as a simplified setup for the interior of a turbulent ice-free cloud. A mixing model was implemented that summarizes the balance equations of water vapor mixing ratio and…
[Phys. Rev. E 109, 045101] Published Mon Apr 01, 2024
Thermal and compositional driven convection in thin reaction fronts
Author(s): Johann Quenta and Desiderio A. Vasquez
Chemical reaction fronts separate regions of reacted and unreacted substances as they propagate in liquids. These fronts may induce density gradients due to different chemical compositions and temperatures across the front. In this paper, we investigate buoyancy-induced convection driven by both typ…
[Phys. Rev. E 109, 035104] Published Thu Mar 28, 2024
Correlations in a weakly interacting two-dimensional random flow
Author(s): I. V. Kolokolov, V. V. Lebedev, and V. M. Parfenyev
We analytically examine fluctuations of vorticity excited by an external random force in two-dimensional fluid. We develop the perturbation theory enabling one to calculate nonlinear corrections to correlation functions of the flow fluctuations found in the linear approximation. We calculate the cor…
[Phys. Rev. E 109, 035103] Published Mon Mar 25, 2024
Experimental investigation of walking drops: Wave field and interaction with slit structures
Author(s): Clive Ellegaard and Mogens T. Levinsen
While bouncing walking silicone oil droplets (walkers) do show many quantumlike phenomena, the original, most intriguing, double-slit experiment with walkers has been shown to be an overinterpretation of data. Several experiments and numerical simulations have proven that for at least some parameter…
[Phys. Rev. E 109, 035101] Published Mon Mar 11, 2024
Numerical simulations of elastic-plastic Richtmyer-Meshkov instability of multiple interfaces
Author(s): Xiangyi Liu, Fenghui Lin, Zhiye Zhao, Nansheng Liu, and Xiyun Lu
The elastic-plastic Richtmyer-Meshkov instability of multiple interfaces is investigated by numerical simulation using a multimaterial solid mechanics algorithm based on an Eulerian framework. This Richtmyer-Meshkov instability problem is realized by a copper layer that is flanked by vacuum and a co…
[Phys. Rev. E 109, 035102] Published Mon Mar 11, 2024
Impact of hydraulic tortuosity on microporous and nanoporous media flow
Author(s): Shiwani Singh
Using two-dimensional porous structures made up of homogeneously arranged solid obstacles, we examine the effects of rarefaction on the hydraulic tortuosity in the slip and early transition flow regimes via extended lattice Boltzmann method. We observed that modification in either the obstacle's arr…
[Phys. Rev. E 109, 025106] Published Fri Feb 23, 2024
Nanoscale electrohydrodynamic ion transport: Influences of channel geometry and polarization-induced surface charges
Author(s): Arghyadeep Paul and N. R. Aluru
Electrohydrodynamic ion transport has been studied in nanotubes, nanoslits, and nanopores to mimic the advanced functionalities of biological ion channels. However, probing how the intricate interplay between the electrical and mechanical interactions affects ion conduction in asymmetric nanoconduit…
[Phys. Rev. E 109, 025105] Published Wed Feb 21, 2024
Validation of symmetry-induced high moment velocity and temperature scaling laws in a turbulent channel flow
Author(s): Francisco Alcántara-Ávila, Luis Miguel García-Raffi, Sergio Hoyas, and Martin Oberlack
The symmetry-based turbulence theory has been used to derive new scaling laws for the streamwise velocity and temperature moments of arbitrary order. For this, it has been applied to an incompressible turbulent channel flow driven by a pressure gradient with a passive scalar equation coupled in. To …
[Phys. Rev. E 109, 025104] Published Wed Feb 14, 2024
Experimental and numerical investigation of three-dimensional shock train topology with differently oriented background waves
Author(s): Dayi Wang, Ziao Wang, Juntao Chang, Lianjie Yue, Gang Wang, and Hao Chen
To better understand the three-dimensional topology of the interaction between the shock train and the background wave, the steady and dynamic characteristics of a shock train were investigated using wind-tunnel experiments and numerical simulation. A 14° wedge placed at the bottom and sidewalls was…
[Phys. Rev. E 109, 025103] Published Tue Feb 13, 2024
Near-critical behavior of the Zhong-Zhang model
Author(s): J. H. Lowenstein
The Zhong-Zhang (ZZ) model is a one-degree-of-freedom dynamical system describing the motion of an insulating plate of length d floating on the upper surface of a convecting fluid, with locking at the boundaries. In the absence of noise, the system away from the boundaries is described by linear dif…
[Phys. Rev. E 109, 025102] Published Mon Feb 05, 2024
Data-based approach for time-correlated closures of turbulence models
Author(s): J. Domingues Lemos and A. A. Mailybaev
Developed turbulent motion of fluid still lacks an analytical description despite more than a century of active research. Nowadays, phenomenological ideas are widely used in practical applications, such as small-scale closures for numerical simulations of turbulent flows. In the present paper, we us…
[Phys. Rev. E 109, 025101] Published Thu Feb 01, 2024
Reassessing the transport properties of fluids: A symbolic regression approach
Author(s): Dimitrios Angelis, Filippos Sofos, and Theodoros E. Karakasidis
The viscosity and thermal conductivity coefficients of the Lennard-Jones fluid are extracted through symbolic regression (SR) techniques from data derived from simulations at the atomic scale. This data-oriented approach provides closed form relations that achieve fine accuracy when compared to well…
[Phys. Rev. E 109, 015105] Published Thu Jan 25, 2024
Multiobjective optimization for flapping foil hydrodynamics with a multitask and multifidelity approach
Author(s): Zhangyuan Wang, Dehan Yuan, Chenglong Wu, Xu Chen, Ruipeng Li, Weicheng Cui, and Dixia Fan
We develop a multitask and multifidelity Gaussian process (MMGP) model to accurately predict and optimize the multiobjective performance of a flapping foil while minimizing the cost of high-fidelity data. Through a comparison of three kernels, we have selected and applied the spectral mixture kernel…
[Phys. Rev. E 109, 015103] Published Tue Jan 23, 2024
Fingering stabilization and adhesion force in the lifting flow with a fluid annulus
Author(s): Írio M. Coutinho, Pedro H. A. Anjos, Rafael M. Oliveira, and José A. Miranda
The lifting Hele-Shaw cell flow commonly involves the stretching of a viscous oil droplet surrounded by air, in the confined space between two parallel plates. As the upper plate is lifted, viscous fingering instabilities emerge at the air-oil interface. Such an interfacial instability phenomenon is…
[Phys. Rev. E 109, 015104] Published Tue Jan 23, 2024