Deformation and breakup of a ferrofluid compound droplet migrating in a microchannel under a magnetic field: A phase-field-based multiple-relaxation time lattice Boltzmann studyThough ubiquitous in many engineering applications, including drug delivery, the compound droplet hydrodynamics in confined geometries have been barely surveyed. For the first time, this study…Parham Poureslami, Mohammad Majidi, Javad Ranjbar Kermani et al.·Oct 14, 2024SaveLearn
Pathways from nucleation to raindropsCloud droplets grow via vapor condensation and collisional aggregation. Upon reaching approximately ≈ 100~ μ m, their inertia allows them to capture smaller droplets during descent,…Florian Poydenot, Bruno Andreotti·Oct 14, 2024SaveLearn
Averaged equations for disperse two-phase flow with interfacial properties and their closures for dilute suspension of dropletsThis article provides a derivation of the averaged equations governing the motion of dispersed two-phase flows with interfacial transport. We begin by revisiting the two-fluid formulation, as well as…Nicolas Fintzi, Jean-Lou Pierson·Oct 14, 2024SaveLearn
AutoTurb: Using Large Language Models for Automatic Algebraic Model Discovery of Turbulence ClosureSymbolic regression (SR) methods have been extensively investigated to explore explicit algebraic Reynolds stress models (EARSM) for turbulence closure of Reynolds-averaged Navier-Stokes (RANS)…Yu Zhang, Kefeng Zheng, Fei Liu et al.·Oct 14, 2024SaveLearn
Vortex Modes in Acoustofluidic Cylindrical ResonatorsThis paper presents a theoretical investigation of vortex modes in acoustofluidic cylindrical resonators with rigid boundaries and viscous fluids. By solving the Helmholtz equation for linear…Alisson S. Marques, Glauber T. Silva·Oct 14, 2024SaveLearn
Elastocapillary sequential fluid capture in hummingbird-inspired grooved sheetsPassive and effective fluid capture and transport at small scale is crucial for industrial and medical applications, especially for the realisation of point-of-care tests. Performing these tests…Emmanuel Siéfert, Benoit Scheid, Fabian Brau et al.·Oct 14, 2024SaveLearn
On the low drag regime of flatback airfoilsFlatback airfoils, characterized by a blunt trailing edge, are used at the root of large wind turbine blades. A low-drag pocket has recently been identified in the flow past these airfoils at high…Konstantinos Kellaris, George Papadakis, Miguel Alfonso Mendez et al.·Oct 14, 2024SaveLearn
A Nonlinear ODE System for the Unsteady Hydrodynamic Force -- A New ApproachWe propose a reduced-order model for the instantaneous hydrodynamic force on a cylinder. The model consists of a system of two ordinary differential equations (ODEs), which can be integrated in time…Osama A. Marzouk·Oct 13, 2024SaveLearn
Variational data assimilation in wall turbulence: From outer observations to wall stress and pressureEstimation of near-wall turbulence in channel flow from outer observations is investigated using adjoint-variational data assimilation. We first consider fully resolved velocity data, starting at a…Mengze Wang, Tamer A. Zaki·Oct 13, 2024SaveLearn
Fokker-Planck Central Moment Lattice Boltzmann Method for Effective Simulations of Fluid DynamicsWe present a new formulation of the central moment lattice Boltzmann (LB) method based on a continuous Fokker-Planck (FP) kinetic model, originally proposed for stochastic diffusive-drift processes…William Schupbach, Kannan Premnath·Oct 13, 2024SaveLearn
The onset of filamentation on vorticity interfaces in two-dimensional Euler flowsTwo-dimensional Euler flows, in the plane or on simple surfaces, possess a material invariant, namely the scalar vorticity normal to the surface. Consequently, flows with piecewise-uniform vorticity…David Dritschel, Adrian Constantin, Pierre Germain·Oct 12, 2024SaveLearn
Machine Learning-Based Estimation of Superdroplet Growth Rates Using DNS DataDroplet growth and size spectra play a crucial role in the microphysics of atmospheric clouds. However, it is challenging to represent droplet growth rate accurately in cloud-resolving models such as…Divyaprakash, Nikita N. Makwana, Amitabh Bhattacharya et al.·Oct 12, 2024SaveLearn
Viscoelastic Effects on the Hydrodynamics of an Active Compound ParticleUnderstanding the hydrodynamics of microswimmers in viscoelastic fluids and confined environments is crucial for interpreting their behaviour in natural settings and designing synthetic microswimmers…KVS Chaithanya, Sumesh P. Thampi·Oct 12, 2024SaveLearn
On the competition between rotation and variable viscosity in a Darcy-Brinkman modelIn the present paper, the onset of thermal convection in a uniformly rotating Darcy-Brinkman porous medium saturated by a variable viscosity fluid is investigated and the competing interplay between…Florinda Capone, Jacopo A. Gianfrani·Oct 12, 2024SaveLearn
Cyclic jetting enables microbubble-mediated drug deliveryThe pursuit of targeted therapies capable of overcoming biological barriers, including the tenacious blood-brain barrier, has spurred the investigation into stimuli-responsive microagents. This…Marco Cattaneo, Giulia Guerriero, Gazendra Shakya et al.·Oct 11, 2024SaveLearn
Boundary conditions for SPH through energy conservationDealing with boundary conditions in Smoothed Particle Hydrodynamics (SPH) poses significant difficulties, indeed being one of the SPHERIC Grand Challenges. In particular, wall boundary conditions…Jose Luis Cercos-Pita, Daniel Duque, Pablo Eleazar Merino-Alonso et al.·Oct 11, 2024SaveLearn
Changes in Fluctuation Waves in Coherent Airflow Structures with Input PerturbationWe predict the development and propagation of the fluctuations in a perturbed ideally-expanded air jet. A non-propagating harmonic perturbation in the density, axial velocity, and pressure is…Osama A. Marzouk·Oct 11, 2024SaveLearn
Numerical studies on steady interaction of low enthalpy hypersonic double wedge flows using different gas modelsNumerical investigations and analyses are carried out particularly on the steady interactions of low enthalpy hypersonic 30-55-deg double wedge configuration at conditions similar to the experimental…Qin Li, Y Wang, Yihui Weng et al.·Oct 11, 2024SaveLearn
Steady Motions of Single Spherical Microswimmers in Non-Newtonian FluidsIn biological systems, microswimmers often propel themselves through complex media. However, many aspects of swimming mechanisms in non-Newtonian fluids remain unclear. This study considers the…Takuya Kobayashi, Ryoichi Yamamoto·Oct 11, 2024SaveLearn
Large Airfoil ModelsThe development of a Large Airfoil Model (LAM), a transformative approach for answering technical questions on airfoil aerodynamics, requires a vast dataset and a model to leverage it. To build this…Howon Lee, Aanchal Save, Pranay Seshadri et al.·Oct 10, 2024SaveLearn
Bounds on the Spreading Radius in Droplet Impact: The Viscous CaseWe consider the problem of droplet impact and droplet spreading on a smooth surface in the case of a viscous Newtonian fluid. We revisit the concept of the rim-lamella model, in which the droplet…Lennon Ó Náraigh, Miguel D. Bustamante·Oct 10, 2024SaveLearn
Flow control-oriented coherent mode prediction via Grassmann-kNN manifold learningA data-driven method using Grassmann manifold learning is proposed to identify a low-dimensional actuation manifold for flow-controlled fluid flows. The snapshot flow field are twice compressed using…Hongfu Zhang, Hui Tang, Bernd R. Noack·Oct 10, 2024SaveLearn
Physics-informed neural networks for multi-field visualization with single-color laser induced fluorescenceReconstructing fields from sparsely observed data is an ill-posed problem that arises in many engineering and science applications. Here, we investigate the use of physics-informed neural networks…Nagahiro Ohashi, Leslie K. Hwang, Beomjin Kwon·Oct 10, 2024SaveLearn
Revisiting 2D Viscoelastic Kolmogorov Flow: A Centre-mode-driven transitionWe revisit viscoelastic Kolmogorov flow to show that the elastic linear instability of an Oldroyd-B fluid at vanishing Reynolds numbers (Re) found by Boffetta et al. (J. Fluid Mech. 523, 161-170,…Theo Lewy, Rich Kerswell·Oct 9, 2024SaveLearn
Potential Flows with Electromagnetically-Induced Circulation in a Hele-Shaw CellIn Hele-Shaw cells, pressure-driven viscous fluid motion between two closely-spaced plates gives rise to a two-dimensional potential flow with zero circulation. Here, we show how the introduction of…Kyle I. McKee, John W. M. Bush·Oct 9, 2024SaveLearn