Intermittency in Shell Models of Turbulent Cascades: from Single-Branch to Multi-BranchIntermittency is one of the central features of turbulent transfer: the multi-scale energy cascade is mediated by rare and intense fluctuations. We investigate this phenomenon in a multi-branch shell…Flavio Tuteri, Sergio Chibbaro, Alexandros Alexakis·Jun 17, 2026SaveLearn
APU-Accelerated Large Eddy Simulation with the Discontinuous Galerkin Solver GALÆXIThe exascale computing era, driven by heterogeneous GPU architectures, requires a fundamental redesign of traditional CFD solvers to fully leverage those heterogeneous systems. The discontinuous…Spencer Starr, Anna Schwarz, Justin Du Plessis et al.·Jun 17, 2026SaveLearn
On the governing mechanism of unsteadiness in bow shock-induced three-dimensional separationWe investigate the driving mechanism of low-frequency unsteadiness in bow shock-turbulent boundary layer interactions due to protuberances. Wind tunnel experiments are conducted at a freestream Mach…S. Vayala, K. Ramachandra, K. Abhishek et al.·Jun 17, 2026SaveLearn
Response of a Turbulent Boundary Layer to a Synthetic Periodic Large-Scale StructureThe dynamic response of a zero-pressure gradient turbulent boundary layer (TBL) to a large-scale perturbation in the outer region was investigated experimentally. The baseline TBL had a moderate…Mitchell Lozier, Flint O. Thomas, Stanislav Gordeyev·Jun 17, 2026SaveLearn
Deformable bodies in a 3-dimensional viscous flow: Vorticity-Stream vector formulationWhen simulating three-dimensional flows interacting with deformable and elastic obstacles, current methods often encounter complexities in the governing equations and challenges in numerical…Andreu F. Gallen, Joan Muñoz Biosca, Mario Castro et al.·Jun 17, 2026SaveLearn
Flow reorganization and transport enhancement in two-dimensional horizontal convection near a density extremumHorizontal convection serves as a canonical model for geophysical and industrial flows. While the Oberbeck-Boussinesq approximation is well established, the impact of a nonlinear equation of state,…Zhiyang Cai, Shengqi Zhang, Kaizhen Shi et al.·Jun 17, 2026SaveLearn
Component-wise dimensionally reduced flows and helicity conservationThe component-wise dimensionally reduced real Schur flows (RSFs) associated to the classical compressible Euler equation [J.-Z. Zhu, J. Math. Phys. 62, 083101 (2021)] is reformulated…Jian-Zhou Zhu·Jun 17, 2026SaveLearn
Solution of the Newtonian plane Couette flow with dynamic wall slip using machine-learning methodsThis study presents a comparative investigation of Physics-Informed Neural Networks (PINNs) and data-driven Deep Operator Networks (DeepONets) for predicting the evolution of plane Newtonian Couette…Georgia Foutsitzi, Nikolaos Antoniadis, Georgios C. Georgiou·Jun 16, 2026SaveLearn
Quartic Lyapunov functions for global fluid stabilityA fluid system is 'globally stable' if all initial conditions eventually converge to the same state. Since Reynolds (1895) and Orr (1907), the standard way to show global stability has been…David Darrow, Elizabeth Carlson, David Goluskin·Jun 16, 2026SaveLearn
How Sparse and How Noisy? Systematic Benchmarking of Inverse Physics-Informed Neural Networks for Manning Friction Estimation in Shallow Water EquationsPhysics-informed neural networks (PINNs) offer a promising framework for inverse hydrodynamic modeling by combining sparse observations with governing physical constraints. However, their reliability…Soheil Radfar·Jun 16, 2026SaveLearn
The magneto-Leidenfrost effect in ferrofluid dropletsThe dynamic Leidenfrost effect LFE and behaviour of impinging colloidal droplets is strongly influenced by the impact and spreading paradigms. LFE actuated rebound and levitation occurs due to…Abhishek Kumar Jaiswal, Neeladri Sekhar Bera, Purbarun Dhar·Jun 16, 2026SaveLearn
Dynamics of a vortex column of supercritical fluid across the pseudo-boiling lineThe evolution of an axisymmetric vortex column in a weakly compressible supercritical fluid is analysed. A thermal layer is imposed to radially stratify the fluid and uncover effects of the large…Jordi Poblador-Ibanez, Fazle Hussain·Jun 16, 2026SaveLearn
Stability of Kirigami parachutes in effectively infinite numerical domainsKirigami, the art of cutting flat sheets into deployable 3D structures, has recently inspired a new class of parachutes which can deploy into a naturally stable inverted canopy. However, the dynamic…Gabriel D. Weymouth, Marin Lauber·Jun 16, 2026SaveLearn
Diapycnal material transport driven by submesoscale frontogenesisSubmesoscale fronts, occurring at intermediate scales between mesoscale eddies and boundary layer turbulence, play a crucial role in driving vertical transport from the ocean surface into the…Tong Bo, James C. McWilliams, Marcelo Chamecki·Jun 16, 2026SaveLearn
Curvilinear Moving Overset Method for High-order Non-dissipative SchemesThis paper presents a non-dissipative, high-order, moving overset method for curvilinear grids to simulate unsteady compressible flows in complex geometries with moving components. Centered…Minhazul Islam, Nek Sharan·Jun 16, 2026SaveLearn
Wave turbulence theory of odd fluids and solids: kinetic equations and solutionsThe theory of wave turbulence describes the properties of physical systems composed of a set of weak-amplitude random waves interacting nonlinearly. Here, we study odd wave turbulence, which arises…Xander M. de Wit, Léo Touzo, Sébastien Galtier et al.·Jun 16, 2026SaveLearn
Reward hacking in physical reinforcement learning revealed by turbulent drag reductionReinforcement-learning controllers optimise specified rewards, but in physical systems those rewards often capture only part of the true control objective. Three mechanisms through which this…Giorgio Maria Cavallazzi, Miguel Pérez-Cuadrado, Alfredo Pinelli·Jun 16, 2026SaveLearn
Direct Numerical Simulation of MILD Combustion: Mixing and Autoignition from Non-Premixed StreamsModerate or intense low-oxygen dilution (MILD) combustion is achieved by strongly diluting and preheating the reactants through mixing with hot combustion products before ignition. To better…Lorenzo Frascino, Gandolfo Scialabba, Hongchao Chu et al.·Jun 16, 2026SaveLearn
Turbulence Without the Viscous Tilting of VorticityVortex stretching is a fundamental aspect of Navier-Stokes turbulence and is commonly understood in analogy to the stretching of infinitesimal material lines. However, the parallel alignment of…Amr Emam, Mostafa Kamal, Perry L. Johnson·Jun 15, 2026SaveLearn
Learning Interface Breakup: A Geometry-Conditioned Latent Surrogate for Spray FormationDesigning spray nozzles requires predicting how geometry shapes transient two-phase breakup, but high-fidelity volume-of-fluid (VOF) simulations with adaptive mesh refinement (AMR) are too expensive…Julius H Ramlau, Friedrich Hastedt, Tolga Birdal et al.·Jun 15, 2026SaveLearn
Engine position effects on contrail evolution for a realistic aircraft configurationThis study investigates the influence of representative engine positions on contrail evolution during the vortex and dissipation regimes, using three-dimensional simulations of a realistic aircraft…Rémy Annunziata, Nicolas Bonne, François Garnier·Jun 15, 2026SaveLearn
A field-equation semi-local transformation for compressible wall turbulenceCompressibility and wall heat transfer change the inner scaling of wall turbulence through the mean density and viscosity fields. Most semi-local transformations are applied after a wall-normal…Zifei Yin, Jing Wang·Jun 15, 2026SaveLearn
Energetic variational formulation for electrohydrodynamics of surfactant-laden dropletsThe coupling between surfactant-laden droplet dynamics and electric fields plays an important role in liquid-handling technologies such as digital microfluidics. We develop an energetic variational…Hangjie Ji, Jian-Guo Liu·Jun 15, 2026SaveLearn
Multilevel radial basis function surrogates for noise-robust DSMC-CFD couplingHybrid methods for simulating rarefied gas flows reduce computational cost by coupling a particle-based model, typically the direct simulation Monte Carlo (DSMC) method, to a continuum-based solver,…Arshad Kamal, Arun K. Chinnappan, James R. Kermode et al.·Jun 15, 2026SaveLearn
Quasi-geostrophic Rayleigh-Bénard convection on the tilted f-planeRapidly rotating Rayleigh-Bénard convection on a f-plane at colatitude f is investigated numerically using an asymptotically reduced equation set valid in the limit of very rapid…Benjamin Miquel, Abram Ellison, Michael A. Calkins et al.·Jun 15, 2026SaveLearn