Modelling of pressure drop in periodic square-bar packed bedsUnderstanding fluid flow through porous media with complex geometries is essential for improving the design and operation of packed-bed reactors. Most existing studies focus on spherical packings,…Hakan Demir, Wojciech Sadowski, Francesca di Mare·Jan 7, 2026SaveLearn
Most probable path and invariant sets in noise-induced transition to turbulenceTurbulence transition often arises from a subcritical transition between bistable states characterized by invariant sets of deterministic dynamical systems, and such transitions can be triggered by…Yoshiki Hiruta, Kento Yasuda, Kenta Ishimoto·Jan 7, 2026SaveLearn
A Minimal Thermo-Fluid Model for Pressure-Driven Extraction in a Moka PotThe moka pot provides a familiar example of a thermally driven flow system in which heating, vapor pressure generation, and fluid extraction are strongly coupled. We present a minimal, dimensionless…Syahril Siregar·Jan 7, 2026SaveLearn
Unifying Viscocapillary and Inertial Regimes in Selective WithdrawalSelective withdrawal extracts only a single phase from a stratified multi-layer system. Entrainment occurs when a critical condition draws up the static layer which is not being withdrawn. Existing…Sabbir Hassan, Arsalan Abutalebi, Sukalyan Bhattacharya et al.·Jan 6, 2026SaveLearn
Statistical State Dynamics Based Study of the Turbulent Ekman LayerStreamwise roll and streak structures (RSS) are prominent features observed in both atmospheric and oceanic planetary boundary layers (PBL) as well as in laboratory scale Wall bounded shear flows.…Eojin Kim, Brian F. Farrell·Jan 6, 2026SaveLearn
A Mixed-Metric Two-Field Framework for Turbulence: Emergent Stress Anisotropy and Wall Asymptotics from a Single ScalarIn our previous work~SanchisAgudoVinuesa2025PRL, we argued that viscous dissipation in turbulence can be understood as the macroscopic imprint of microscopic path uncertainty, and showed that…Marcial Sanchis-Agudo, Ricardo Vinuesa·Jan 6, 2026SaveLearn
X-CAL: Explaining latent causality in physical space for fluid mechanicsWe present X-CAL, a pipeline that combines a β-variational autoencoder (β-VAE) with the synergistic-unique-redundant decomposition (SURD)~surd approach for causality analysis to…Marcial Sanchis-Agudo, Andrés Cremades, Alvaro Martinez-Sanchez et al.·Jan 6, 2026SaveLearn
ML enhanced measurement of the electrostatic charge distribution of powder conveyed through a ductThe electrostatic charge acquired by powders during transport through ducts can cause devastating dust explosions. Our recently developed laser-optical measurement technique can resolve the powder…Christoph Wilms, Wenchao Xu, Gizem Ozler et al.·Jan 6, 2026SaveLearn
Data-Driven Flow Initialization Framework for CFD Acceleration of Underwater Vehicle in Vertical-Plane Oblique MotionAccurate prediction of flow fields around underwater vehicles undergoing vertical-plane oblique motions is critical for hydrodynamic analysis, but it often requires computationally expensive CFD…Tianli Hu, Chengsheng Wu, Jun Ding et al.·Jan 6, 2026SaveLearn
Relaxation and statistical equilibria in generalised two-dimensional flowsWe study relaxation toward statistical equilibrium states of inviscid generalised two-dimensional flows, where the generalised vorticity q is related to the streamfunction via…Vibhuti Bhushan Jha, Kannabiran Seshasayanan, Vassilios Dallas·Jan 5, 2026SaveLearn
Complex-time singular structure of the 1D Hou-Luo modelStarting from smooth initial data, we investigate the complex-time analytic structure of the one-dimensional Hou--Luo (HL) model, a wall approximation of the three-dimensional axisymmetric Euler…Cornelius Rampf, Sai Swetha Venkata Kolluru·Jan 5, 2026SaveLearn
Receptivity and instability of the hypersonic flow over moderately blunt conesWith a view to identifying and understanding the linear receptivity and amplification mechanisms that underpin laminar-to-turbulent transition over blunt bodies in hypersonic flow, we use resolvent…N. d'Eprémesnil, C. Caillaud, G. Lehnasch et al.·Jan 5, 2026SaveLearn
Liouville Spectral Gap and Bifurcation Driven Lagrangian Eulerian Decoupling with Nondiffusive Turbulence ClosuresIn fully developed homogeneous and isotropic turbulence, the Lagrangian and Eulerian descriptions of motion, although formally equivalent, become statistically decoupled. In this work, by invoking…Nicola de Divitiis·Jan 5, 2026SaveLearn
Density-based topology optimization for turbulent fluid flow using the standard k-epsilon RANS model with wall-functions imposed through an implicit wall penalty formulationTurbulent flows have high requirements for very fine meshes near the boundary to ensure accuracy. In the context of topology optimization (TO), such fine meshes become unrealistic and common…Amirhossein Bayat, Hao Li, Joe Alexandersen·Jan 5, 2026SaveLearn
Multi-fidelity graph-based neural networks architectures to learn Navier-Stokes solutions on non-parametrized 2D domainsWe propose a graph-based, multi-fidelity learning framework for the prediction of stationary Navier--Stokes solutions in non-parametrized two-dimensional geometries. The method is designed to guide…Francesco Songia, Raoul Sallé de Chou, Hugues Talbot et al.·Jan 5, 2026SaveLearn
Statistical state dynamics modes and equilibria underlie the structure and mechanism of wide channel Couette turbulenceWide channel Couette (WCC) turbulence is striking in being dominated by a large-scale spanwise periodic structure composed of streamwise streaks and associated roll superstructures. This apparent…Brian F. Farrell, Petros J. Ioannou·Jan 5, 2026SaveLearn
Effect of particle-momentum on an isothermal flow-field inside a swirl combustorThis paper investigates the impact of particles on isothermal flow inside a lab-scale swirl combustor for a fixed inlet swirl number of 0.67 using steady-state CFD simulations. The combustor geometry…Madan Lal Mahato, Nitesh Kumar Sahu·Jan 5, 2026SaveLearn
Settling of chiral particles in a turbulent flowChiral particles are experimentally investigated while settling inwater with various turbulence intensity levels. The locations and orientations of the particles are tracked over time, allowing the…Mees M. Flapper, John E. Sader, Detlef Lohse et al.·Jan 5, 2026SaveLearn
Zonal flows driven by libration in rotating spherical shells: the case of periodic characteristic pathsThis work investigates the weakly nonlinear dynamics of internal shear layers and the mean zonal flow induced by the longitudinal libration of an inner core within a spherical shell. Building on the…Xu Chang, Jiyang He, Benjamin Favier et al.·Jan 5, 2026SaveLearn
Efficient temporal prediction of compressible flows in irregular domains using Fourier neural operatorsThis paper investigates the temporal evolution of high-speed compressible fluids in irregular flow fields using the Fourier Neural Operator (FNO). We reconstruct the irregular flow field point set…Yifan Nie, Qiaoxin Li·Jan 5, 2026SaveLearn
Applying contact angles based on a continuously moving contact line in 2D VOF simulationsA height-function-based numerical approach is developed for enforcing contact angles on flat and curved solid surfaces within two-dimensional volume-of-fluid simulations. This method incorporates the…Tianyang Han, Jieyun Pan, Chongsen Huang et al.·Jan 4, 2026SaveLearn
Complete Matched Asymptotic Expansions for Velocity Statistics in Turbulent ChannelsComplete high fidelity matched asymptotic expansions (abbreviated MAE) are developed for the first and second order turbulence statistics in channel flow from 11 direct numerical simulations (DNS).…Peter A. Monkewitz·Jan 4, 2026SaveLearn
Scalar mixing in non-Markovian homogeneous isotropic synthetic turbulenceWe show that non-Markovianity of the velocity field is an essential property of turbulent mixing. We demonstrate this via passive scalar mixing by synthetically generated stochastic velocity fields.…Pratyush S. Awasthi, Joaquim P. Jossy, Amitabh Bhattacharya et al.·Jan 4, 2026SaveLearn
Wave turbulence of inertia--gravity waves: a theory for the oceanic spectrumWe present a derivation using kinetic wave theory of the two-dimensional empirical Garrett--Munk spectrum for ocean internal waves, valid at all frequencies including near-inertial frequencies. This…Michal Shavit, Oliver Bühler, Jalal Shatah·Jan 4, 2026SaveLearn
Shuttlecock velocity decay after smash and slice shots in badmintonThis paper reports on the decay in shuttlecock velocity after smash and slice shots performed by elite and international players, based on the analysis of videos captured on a badminton court with…Eric Collet·Jan 4, 2026SaveLearn