Bounds on dissipation in three-dimensional planar shear flows: reduction to two-dimensional problemsBounds on turbulent averages in shear flows can be derived from the Navier--Stokes equations by a mathematical approach called the background method. Bounds that are optimal within this method can be…Farid Rajkotia-Zaheer, David Goluskin·Mar 6, 2025SaveLearn
Efficient neural topology optimization via active learning for enhancing turbulent mass transfer in fluid channelsThe design of fluid channel structures of reactors or separators of chemical processes is key to enhancing the mass transfer processes inside the devices. However, the systematic design of channel…Chenhui Kou, Yuhui Yin, Min Zhu et al.·Mar 6, 2025SaveLearn
The effect of self-induced Marangoni flow on polar-nematic waves in active-matter systemsWe study the formation of propagating large-scale density waves of mixed polar-nematic symmetry in a colony of self-propelled agents that are bound to move along the planar surface of a thin viscous…Andrey Pototsky, Uwe Thiele·Mar 5, 2025SaveLearn
Bubbles-induced transition to elasto-inertial turbulenceInterface-resolved direct numerical simulations are performed to investigate bubble-induced transition from laminar to elasto-inertial turbulent (EIT) state in a pressure-driven viscoelastic square…Hafiz Usman Naseer, Daulet Izbassarov, Marco Edoardo Rosti et al.·Mar 5, 2025SaveLearn
Lagrangian flow statistics in experimental homogeneous isotropic turbulenceWe report on Lagrangian flow statistics from experimental measurements of homogeneous isotropic turbulence. The investigated flow is driven by 12 impellers inside an icosahedral volume. Seven…Cheng Wang, Sander G. Huisman, Thomas Basset et al.·Mar 5, 2025SaveLearn
Neural network-augmented eddy viscosity closures for turbulent premixed jet flamesExtending gradient-type turbulence closures to turbulent premixed flames is challenging due to the significant influence of combustion heat release. We incorporate a deep neural network (DNN) into…Priyesh Kakka, Jonathan F. MacArt·Mar 5, 2025SaveLearn
Phenomenology of decaying turbulence beneath surface wavesThis paper explores decaying turbulence beneath surface waves that is initially isotropic and shear-free. We start by presenting phenomenology revealed by wave-averaged numerical simulations: an…Gregory L. Wagner, Navid C. Constantinou·Mar 5, 2025SaveLearn
Direct numerical simulation benchmarks for the prediction of boundary layer bypass transition in the narrow senseWe report a comprehensive set of direct numerical simulation benchmarks of bypass transition in the narrow sense with inlet freestream turbulent intensity levels of 0.75%, 1.5%, 2.25%, 3.0%, and…Xiaohua Wu, Carlos A. Gonzalez, Rahul Agrawal·Mar 5, 2025SaveLearn
Emergent turbulence and coarsening arrest in active-spinner fluidsWe uncover activity-driven crossover from phase separation to a new turbulent state in a two-dimensional system of counter-rotating spinners. We study the statistical properties of this active-rotor…Biswajit Maji, Nadia Bihari Padhan, Rahul Pandit·Mar 5, 2025SaveLearn
Modelling of the dewetting of ultra-thin liquid films on chemically patterned substrates: linear spectrum and deposition patternsLiquid films of nanometric thickness are prone to spinodal dewetting driven by disjoining pressure, meaning that a non-wetting liquid film of homogeneous thickness in the range of tens of nanometers…Tilman Richter, Paolo Malgaretti, Jens Harting·Mar 5, 2025SaveLearn
Experimental and numerical study of CO2 dissolution in a heterogeneous Hele-Shaw cellWe investigate the convective instability resulting from the dissolution of carbon dioxide (CO2) into water in a heterogeneous Hele-Shaw cell utilizing both experimental and numerical…Rima Benhammadi, PAtrice Meunier, Juan J. Hidalgo·Mar 5, 2025SaveLearn
Steady undisturbed velocity correction scheme for Euler-Lagrange simulations near planar wallsEuler-Lagrange (EL) point-particle simulations rely on hydrodynamic force closure models to accurately predict particle dynamics in flows. The closure models currently employed for dilute…Akshay Chandran, Fabien Evrard, Berend van Wachem·Mar 5, 2025SaveLearn
Hydrodynamic memory and Quincke rotationThe spontaneous (so-called Quincke) rotation of an uncharged, solid, dielectric, spherical particle under a steady electric field is analyzed, accounting for the inertia of the particle and the…Jason K. Kabarowski, Aditya S. Khair, Rahil N. Valani·Mar 5, 2025SaveLearn
Influence of Membrane Characteristics on Efficiency of Vacuum Membrane Distillation: a Lattice Boltzmann StudyWith increasing water scarcity, membrane distillation technology has gained widespread attention as an innovative method for seawater desalination.However,existing studies often overlook the…Hongxuan Zhang, Dian Gong, Yiling Zhou et al.·Mar 5, 2025SaveLearn
Transient and steady convection in two dimensionsWe simulate thermal convection in a two-dimensional square box using the no-slip condition on all boundaries, and isothermal bottom and top walls and adiabatic sidewalls. We choose 0.1 and 1 for the…Ambrish Pandey, Katepalli R. Sreenivasan·Mar 5, 2025SaveLearn
Industrialisation of spectral/hp element method for incompressible, transitional flow around Formula 1 geometriesThis study applies the high-fidelity spectral/hp element method using the open-source Nektar++ framework to simulate the unsteady, transitional flow around complex 3D geometries representative of the…Parv Khurana, Alexandra Liosi, Spencer Sherwin et al.·Mar 4, 2025SaveLearn
Turbulence and energy dissipation from wave breakingWave breaking is a critical process in the upper ocean: an energy sink for the surface wave field and a source for turbulence in the ocean surface boundary layer. We apply a novel multi-layer…Jiarong Wu, Stéphane Popinet, Bertrand Chapron et al.·Mar 4, 2025SaveLearn
High Speed Imagery Analysis of Droplet Impact on Soft Oil Infused SurfaceDroplet impact on solid liquid-infused surfaces (LIS) has been widely explored due to its significant scientific implications and industrial relevance. In most studies, the predominant impact…Shubham S. Ganar, Deepak J., Arindam Das·Mar 4, 2025SaveLearn
Comprehensive Analysis of Relative Pressure Estimation Methods Utilizing 4D Flow MRIMagnetic resonance imaging (MRI) can estimate three-dimensional (3D) time-resolved relative pressure fields using 4D-flow MRI, thereby providing rich pressure field information. Clinical alternatives…Brandon Hardy, Judith Zimmermann, Vincent Lechner et al.·Mar 4, 2025SaveLearn
Hyperbolic free-surface jetsIf a body of inviscid fluid is disturbed, it will typically eject a jet of fluid. If the effects of gravity and surface tension are negligible, these jets travel in straight lines, with the tips…Andrew Wilkinson, Michael A. Morgan, Michael Wilkinson·Mar 4, 2025SaveLearn
Tidal fluctuations and spatial heterogeneity lead to trapping and chaotic mixing in coastal aquifersThe combined effect of tidal forcing and aquifer heterogeneity leads to intricate transport patterns in coastal aquifers that impact both on solute residence times and mixing dynamics. We study these…Satoshi Tajima, Marco Dentz·Mar 4, 2025SaveLearn
Data-driven Turbulence Modeling for Separated Flows Considering Non-Local EffectThis study aims to enhance the generalizability of Reynolds-averaged Navier-Stokes (RANS) turbulence models, which are crucial for engineering applications. Classic RANS turbulence models often…Chenyu Wu, Shaoguang Zhang, Changxin Guo et al.·Mar 4, 2025SaveLearn
On the choice of proper outlet boundary conditions for numerical simulation of cardiovascular flowsIt is well known that in the computational fluid dynamics simulations related to the cardiovascular system the enforcement of outflow boundary conditions is a crucial point. In fact, they highly…Zahra Mirzaiyan, Michele Girfoglio, Gianluigi Rozza·Mar 4, 2025SaveLearn
Tradeoffs in Biconic Intake Aerodynamic Design Optimization with Sub-optimal Oswatitsch SolutionsThe notion of sub-optimal Oswatitsch solutions is introduced in order to systematically conduct a tradeoff between total pressure recovery (TPR) and intake drag coefficient (CDi) for supersonic…J. P. S. Sandhu, M. Bhardwaj, N. Ananthkrishnan et al.·Mar 4, 2025SaveLearn
Flow Improving Devices For Marine Propulsers. Concept Design StudyFlow-improving devices (FIDs) are used the most effectively for the reduction of noise and vibration induced by a propulsor. These devices may also increase the efficiency of a propulsor and in some…Vladimir Sluchak·Mar 4, 2025SaveLearn