Toward ultra-efficient high fidelity predictions of wind turbine wakes: Augmenting the accuracy of engineering models via LES-trained machine learningThis study proposes a novel machine learning (ML) methodology for the efficient and cost-effective prediction of high-fidelity three-dimensional velocity fields in the wake of utility-scale turbines.…Christian Santoni, Dichang Zhang, Zexia Zhang et al.·Apr 11, 2024SaveLearn
Revisiting a drag partition model for canopy-like roughness elementsTurbulent flows over a large surface area (S) covered by n obstacles experience an overall drag due to the presence of the ground and the protruding obstacles into the flow. The drag partition…Elia Buono, Gabriel G. Katul, Davide Vettori et al.·Apr 11, 2024SaveLearn
Active Carpets in floating viscous filmsEarth's aquatic environments are inherently stratified layered systems where interfaces between layers serve as ecological niches for microbial swimmers, forming colonies known as Active Carpet (AC).…Felipe A. Barros, Hugo N. Ulloa, Gabriel Aguayo et al.·Apr 11, 2024SaveLearn
Modon solutions in an N-layer quasi-geostrophic modelModons, or dipolar vortices, are common and long-lived features of the upper ocean, consisting of a pair of monopolar vortices moving through self-advection. Such structures remain stable over long…Matthew N. Crowe, Edward R. Johnson·Apr 11, 2024SaveLearn
Topology of shallow-water waves on the rotating sphereTopological properties of the spectrum of shallow-water waves on a rotating spherical body are established. Particular attention is paid to its spectral flow, i.e. the modes whose frequencies transit…Nicolas Perez, Armand Leclerc, Guillaume Laibe et al.·Apr 11, 2024SaveLearn
TURB-Hel: an open-access database of helically forced homogeneous and isotropic turbulenceWe present TURB-Hel, a database formed by two datasets of incompressible homogeneous and isotropic turbulence, maintained in a statistically stationary state by fully helical forcing. The aim is to…Luca Biferale, Fabio Bonaccorso, Moritz Linkmann et al.·Apr 11, 2024SaveLearn
Is a direct numerical simulation (DNS) of Navier-Stokes equations with small enough grid spacing and time-step definitely reliable/correct?Traditionally, results given by the direct numerical simulation (DNS) of Navier-Stokes equations are widely regarded as reliable benchmark solutions of turbulence, as long as grid spacing is fine…Shejie Qin, Yu Yang, Yongxiang Huang et al.·Apr 11, 2024SaveLearn
Wettability-dependent dissolution dynamics of oxygen bubbles on Ti64 substratesIn this study, the dissolution of a single oxygen bubble on a solid surface, here Titianium alloy Ti64, in ultrapure water with different oxygen undersaturation levels is investigated. For that…Hongfei Dai, Xuegeng Yang, Karin Schwarzenberger et al.·Apr 11, 2024SaveLearn
Experimental and numerical investigation of inertial particles in underexpanded jetsExperiments and numerical simulations of inertial particles in underexpanded jets are performed. The structure of the jet is controlled by varying the nozzle pressure ratio, while the influence of…Meet Patel, Juan Sebastian Rubio, David Shekhtman et al.·Apr 10, 2024SaveLearn
The fluid dynamics of a viscoelastic fluid dripping onto a substrateExtensional flows of complex fluids are pivotal in industrial applications like spraying, atomisation, and microfluidic drop deposition. The Dripping-on-Substrate (DoS) technique is a conceptually…Konstantinos Zinelis, Thomas Abadie, Gareth H. McKinley et al.·Apr 10, 2024SaveLearn
Identification of Settling Velocity with Physics Informed Neural Networks For Sediment Laden FlowsPhysics-Informed Neural Networks (PINNs) have shown great potential in the context of fluid dynamics simulations, particularly in reconstructing flow fields and identifying key parameters. In this…Mickaël Delcey, Yoann Cheny, Jean-Baptiste Keck et al.·Apr 10, 2024SaveLearn
Data-driven modeling of unsteady flow based on deep operator networkTime-dependent flow fields are typically generated by a computational fluid dynamics (CFD) method, which is an extremely time-consuming process. However, the latent relationship between the flow…Heming Bai, Zhicheng Wang, Xuesen Chu et al.·Apr 10, 2024SaveLearn
A Lagrangian meshfree model for solidification of liquid thin-filmsIn this paper, a new method to model solidification of thin liquid films is proposed. This method is targeted at applications like aircraft icing and tablet coating where the formation of…Anand S Bharadwaj, Elisa Thiel, Pratik Suchde·Apr 10, 2024SaveLearn
Water wave interactions with surface-piercing vertical barriers in a rectangular tank: Connections with Bloch waves and quasimodesEigenmodes are studied for a fluid-filled rectangular tank containing one or more vertical barriers, and on which either Dirichlet or Neumann boundary conditions are prescribed on the lateral walls.…Ben Wilks, Fabien Montiel, Luke G. Bennetts et al.·Apr 10, 2024SaveLearn
Wavelet-based resolvent analysis of non-stationary flowsThis work introduces a formulation of resolvent analysis that uses wavelet transforms rather than Fourier transforms in time. Under this formulation, resolvent analysis may extend to turbulent flows…Eric Ballouz, Barbara Lopez-Doriga, Scott T. M. Dawson et al.·Apr 9, 2024SaveLearn
Two-dimensional turbulence above topography: condensation transition and selection of minimum enstrophy solutionsWe consider two-dimensional flows above topography, revisiting the selective decay (or minimum-enstrophy) hypothesis of Bretherton and Haidvogel. We derive a 'condensed branch' of solutions to the…Basile Gallet·Apr 9, 2024SaveLearn
Sparse space-time resolvent analysis for statistically-stationary and time-varying flowsResolvent analysis provides a framework to predict coherent spatio-temporal structures of largest linear energy amplification, through a singular value decomposition (SVD) of the resolvent operator,…Barbara Lopez-Doriga, Eric Ballouz, H. Jane Bae et al.·Apr 9, 2024SaveLearn
Turbulent cascade arrests and the formation of intermediate-scale condensatesEnergy cascades lie at the heart of the dynamics of turbulent flows. In a recent study of turbulence in fluids with odd-viscosity [de Wit et al., Nature 627, 515 (2024)], the…Kolluru Venkata Kiran, Dario Vincenzi, Rahul Pandit·Apr 9, 2024SaveLearn
Resolving turbulence and drag over textured surfaces using texture-less simulations: the case of slip/no-slip texturesWe study the effect of surface texture on an overlying turbulent flow for textures made of an alternating slip/no-slip pattern, a common model for superhydrophobic surfaces, but also a particularly…Wenxiong Xie, Chris T Fairhall, Ricardo García-Mayoral·Apr 9, 2024SaveLearn
Numerical validation of scaling laws for stratified turbulenceRecent theoretical progress using multiscale asymptotic analysis has revealed various possible regimes of stratified turbulence. Notably, buoyancy transport can either be dominated by advection or…Pascale Garaud, Greg P. Chini, Laura Cope et al.·Apr 8, 2024SaveLearn
Fourier neural operator for large eddy simulation of compressible Rayleigh-Taylor turbulenceThe Fourier neural operator (FNO) framework is applied to the large eddy simulation (LES) of three-dimensional compressible Rayleigh-Taylor (RT) turbulence with miscible fluids at Atwood number…Tengfei Luo, Zhijie Li, Zelong Yuan et al.·Apr 8, 2024SaveLearn
Phenomenon of self-oscillation in bubble dynamics: Bouncing acoustic bubblesSelf-oscillations underlie many natural phenomena such as heartbeat, ocean waves, and the pulsation of variable stars. From pendulum clocks to the behavior of animal groups, self-oscillation is one…Gabriel Regnault, Alexander A Doinikov, Gabrielle Laloy-Borgna et al.·Apr 8, 2024SaveLearn
Complex network approach to the turbulent velocity gradient dynamics: High- and low-probability Lagrangian pathsUnderstanding the dynamics of the turbulent velocity gradient tensor (VGT) is essential to gain insights into the Navier-Stokes equations and improve small-scale turbulence modeling. However,…Christopher J. Keylock, Maurizio Carbone·Apr 8, 2024SaveLearn
Wall-modeled large-eddy simulation based on spectral-element discretizationThis article analyses the simulation methodology for wall-modeled large-eddy simulations using solvers based on the spectral-element method (SEM). To that end, algebraic wall modeling is implemented…Timofey Mukha, Philipp Schlatter·Apr 8, 2024SaveLearn
On the relevance of lift force modelling in turbulent wall flows with small inertial particlesIn particle-laden turbulent wall flows, lift forces can influence the near-wall turbulence. This has been recently observed in particle-resolved simulations, which, however, are too expensive to be…Wei Gao, Pengyu Shi, Matteo Parsani et al.·Apr 8, 2024SaveLearn