Boundary-velocity error and stability of the accelerated multi-direct-forcing immersed boundary methodThe multi-direct-forcing immersed boundary method allows for a small velocity error of the no-slip condition in moving-particle problems but suffers from numerical instability if simulation…Kosuke Suzuki, Emmanouil Falagkaris, Timm Krüger et al.·Jul 7, 2025SaveLearn
Geometry of the vapor layer under a Leidenfrost hydrogel sphereA floating Leidenfrost droplet exhibits curvature inversion of its underside, due to the balance of vapor pressure and surface tension. Using interferometric imaging, we find different behavior for a…Vicente L. Diaz-Melian, Isaac C. D. Lenton, Jack Binysh et al.·Jul 7, 2025SaveLearn
Emergence of Local Ordering and Mesoscale Giant Number Fluctuations in Active TurbulenceWe study spatiotemporal chaos in two-dimensional dense active suspensions using a generalized hydrodynamic model. Increasing activity induces a structural transition marked by the formation of…Kirti Kashyap, Kolluru Venkata Kiran, Anupam Gupta·Jul 7, 2025SaveLearn
A novel parallelizable convergence accelerating method: Pointwise Frequency DampingThis paper proposes a novel class of data-driven acceleration methods for steady-state flow field solvers. The core innovation lies in predicting and assigning the asymptotic limit value for each…Zikun Liu, Xukun Wang, Yilang Liu et al.·Jul 7, 2025SaveLearn
Heat transfer modulation in Phase Change Materials via fin insertionWe leverage a large set of numerical simulations to study optimized geometrical configurations for Phase Change Materials (PCMs) cells. We consider a PCM cell as a square enclosure with a solid…Paolo Proia, Mauro Sbragaglia, Giacomo Falcucci·Jul 7, 2025SaveLearn
A symbolic regression-based implicit algebraic stress turbulence model: incorporating the production of non-dimensional Reynolds stress deviatoric tensorTurbulence constitutes an exceptionally complex and irregular flow phenomenon that manifests in liquids, gases, and plasma, making it ubiquitous in both natural processes and engineering…Ziqi Ji, Penghao Duan, Gang Du·Jul 7, 2025SaveLearn
Bayesian optimization of a cost function in suboptimal control for reducing skin friction drag in wall turbulenceA systematic and automated framework for developing closed-loop flow control strategies is proposed, integrating suboptimal control theory [Lee et al., J. Fluid Mech. 358, 245 (1998)] with Bayesian…Yusuke Yugeta, Yosuke Hasegawa·Jul 7, 2025SaveLearn
Retraction Dynamics of a Highly Viscous Liquid SheetWe study the one-dimensional capillary-driven retraction of a finite, planar liquid sheet in the asymptotic regime where both the Ohnesorge number Oh and the initial length-to-thickness…Taosif Ahsan, Rodolfo Brandão, Benny Davidovitch et al.·Jul 7, 2025SaveLearn
Optimal transitional mechanisms of incompressible separated shear layers subject to external disturbancesOptimal transitional mechanisms are analysed for an incompressible shear layer developing over a short, pressure gradient-induced laminar separation bubble (LSB) with peak reversed flow of 2%.…Flavio Savarino, Denis Sipp, Georgios Rigas·Jul 6, 2025SaveLearn
Spreading droplets of yield-stress fluids with and without gravityWe investigate the effect of gravity on the spreading of droplets of yield stress fluids, by performing both microgravity experiments (in a drop tower) and experiments under terrestrial gravity. We…Linnea Heitmeier, Olfa D'Angelo, Maziyar Jalaal et al.·Jul 6, 2025SaveLearn
Active Scalar Mixing by Homogeneous Isotropic TurbulenceWe study the mixing of active scalars by homogeneous isotropic incompressible stochastic velocity fields. We consider both Navier-Stokes generated turbulent fields as well as artificially generated…Joaquim P. Jossy, Pratyush S. Awasthi, Prateek Gupta·Jul 5, 2025SaveLearn
Burnett-level multi-relaxation-time central-moment discrete Boltzmann modeling of reactive flowsA multi-relaxation-time central-moment discrete Boltzmann method (CDBM) is developed for compressible reactive flows, incorporating the effects of chemical reactions. The Chapman--Enskog multiscale…Qingbin Wu, Chuandong Lin, Huilin Lai·Jul 5, 2025SaveLearn
Spatially localised doubly diffusive convection in an axisymmetric spherical shellDoubly diffusive convection describes the fluid motion driven by the competition of temperature and salinity gradients diffusing at different rates. While the convective motions driven by these…Paul M. Mannix, Cedric Beaume·Jul 4, 2025SaveLearn
Elastohydrodynamics of 3D chemically active filamentsActive deformable filaments exhibit a large range of qualitatively different three-dimensional dynamics, depending on their flexibility, the strength and nature of the active forcing, and the…Matthew D Butler, Benjamin J Walker, Thomas Montenegro-Johnson et al.·Jul 4, 2025SaveLearn
Super-resolution of turbulent velocity fields in two-way coupled particle-laden flowsThis paper introduces a deep learning-based super-resolution (SR) framework specifically developed for accurately reconstructing high-resolution velocity fields in two-way coupled particle-laden…Ali Shamooni, Ruyue Cheng, Thorsten Zirwes et al.·Jul 4, 2025SaveLearn
Phase dynamics and their role determining energy flux in hydrodynamic shell modelsThe transfer of energy and other conserved quantities across scales, also known as flux or spectral flux, is a central aspect of out-of-equilibrium systems such as turbulent hydrodynamic flows.…Santiago J. Benavides, Miguel D. Bustamante·Jul 4, 2025SaveLearn
Disentangling temperature and Reynolds number effects in quantum turbulenceThe interplay between viscous and frictional dissipation is key to understanding quantum turbulence dynamics in superfluid 4He. Based on a coarse-grained two-fluid description, an original…Juan Ignacio Polanco, Philippe-E. Roche, Luminita Danaila et al.·Jul 4, 2025SaveLearn
Vortex topology in the lee of a 6:1 prolate spheroidA large scale parametric study of the flow over the prolate spheroid is presented to understand the effect of Reynolds number and angle of attack on the separation, the wake formation and the loads.…Marc Plasseraud, Krishnan Mahesh·Jul 3, 2025SaveLearn
Large-scale streak instabilities of transitional channel flowThe emergence of large-scale spatial modulations of turbulent channel flow, as the Reynolds number is decreased, is addressed numerically using the framework of linear stability analysis. Such…Nicola Ciola, Yohann Duguet, Jean-Christophe Robinet et al.·Jul 3, 2025SaveLearn
Computational Modelling of Thixotropic Multiphase FluidsMultiphase systems are ubiquitous in engineering, biology, and materials science, where understanding their complex interactions and rheological behavior is crucial for advancing applications ranging…Andres Santiago Espinosa-Moreno, Nicolas Moreno, Marco Ellero·Jul 3, 2025SaveLearn
Data-Driven Transient Growth AnalysisThe transient growth of disturbances made possible by the non-normality of the linearized Navier-Stokes equations plays an important role in bypass transition for many shear flows. Transient growth…Zhicheng Kai, Peter Frame, Aaron Towne·Jul 3, 2025SaveLearn
Hilbert Proper Orthogonal Decomposition: a tool for educing advective wavepackets from flow field dataTravelling wavepackets are key coherent features contributing to the dynamics of several advective flows. This work introduces the Hilbert proper orthogonal decomposition (HPOD) to distil these…Marco Raiola, Jochen Kriegseis·Jul 3, 2025SaveLearn
A semi-analytical solution for the lubrication force between two spheres approaching in viscoelastic fluids described by the Oldroyd-B model under small Deborah numbersViscoelastic fluids play a critical role in various engineering and biological applications, where their lubrication properties are strongly influenced by relaxation times ranging from microseconds…Alan Rosales-Romero, Adolfo Vázquez-Quesada, Marco Ellero et al.·Jul 3, 2025SaveLearn
Predicting Flow-Induced Vibration in Isolated and Tandem Cylinders Using Hypergraph Neural NetworksWe present a finite element-inspired hypergraph neural network framework for predicting flow-induced vibrations in freely oscillating cylinders. The surrogate architecture transforms unstructured…Shayan Heydari, Rui Gao, Rajeev K Jaiman·Jul 3, 2025SaveLearn
Experimental evaluation of advanced control strategies for high-blockage cross-flow turbine arraysIn river or tidal channels, cross-flow turbines can achieve higher blockage ratios than other turbine variants, and are therefore able to achieve higher efficiencies. Here, we experimentally…Aidan Hunt, Gregory Talpey, Brian Polagye·Jul 2, 2025SaveLearn