A mass-conserving contact line treatment for second-order conservative phase field methods based on the generalized Navier boundary conditionA mass-conserving contact line treatment for second-order conservative phase field methods is presented and applied to the conservative diffuse interface (CDI) model. The treatment centers on a…Reed L. Brown, Shahab Mirjalili, Makrand A. Khanwale et al.·Dec 22, 2024SaveLearn
An energy-stable phase-field model for droplet icing simulationsA phase-field model for three-phase flows is established by combining the Navier-Stokes (NS) and the energy equations, with the Allen-Cahn (AC) and Cahn-Hilliard (CH) equations and is demonstrated…Zhihua Wang, Lijing Zhou, Wenqiang Zhang et al.·Dec 22, 2024SaveLearn
A Graph Neural Network Surrogate Model for Multi-Objective Fluid-Acoustic Shape OptimizationThis article presents a graph neural network (GNN) based surrogate modeling approach for fluid-acoustic shape optimization. The GNN model transforms mesh-based simulations into a computational graph,…Farnoosh Hadizadeh, Wrik Mallik, Rajeev K. Jaiman·Dec 22, 2024SaveLearn
How soap bubbles change shape while maintaining a fixed volume of air?We combine experiments and theoretical derivations to study the evolution of a stretched soap bubble and compare it with an open film to highlight the effect of volume conservation. We identify a…Wei-Chih Li, Chih-Yao Shih, Tzu-Liang Chang et al.·Dec 21, 2024SaveLearn
Directional focused wave group response of a Floating Wind Turbine: Harmonic separation in experiment and CFDThe offshore wind sector relies on floating foundations for deeper waters but faces challenges from harsh conditions, nonlinear dynamics, and low-frequency resonant motions caused by second-order…Sithik Aliyar, Henrik Bredmose, Johan Roenby et al.·Dec 21, 2024SaveLearn
Wall-modeled large-eddy simulation of turbulent smooth body separation using the OpenFOAM flow solverThis work investigates the current wall-modeled large-eddy simulation (WMLES) capabilities of the open-source computational fluid dynamics solver OpenFOAM, which is used widely in academia and…Christoffer Hansen, Xiang I. A. Yang, Mahdi Abkar·Dec 21, 2024SaveLearn
Dynamics and universal scaling of Worthington jets in the cavity-free regimeWorthington jets ejected after the impact of a solid or liquid object on a liquid surface have extensive applications in natural, industrial, and scientific contexts. Here, we present a combined…Xingsheng Li, Jing Li·Dec 21, 2024SaveLearn
Modelling visibility and surface deformation in particle-fluid flow fields generated by helicopter rotorsAs a helicopter descends towards a bed of sand, a high velocity particle laden cloud can form around the helicopter body, a phenomenon known as "brownout", and a consequence of which can potentially…Stephen Langdon, David J. Needham·Dec 21, 2024SaveLearn
Nutrient Transport in Concentration GradientsSessile ciliates attach to substrates and generate feeding currents to capture passing particulates and dissolved nutrients. Optimal ciliary activity that maximizes nutrient flux at the cell surface…Jingyi Liu, Yi Man, Eva Kanso·Dec 21, 2024SaveLearn
Self-Propulsion of floating ice blocks caused by melting in waterWe show that floating ice blocks with asymmetric shapes can self-propel with significant speeds due to buoyancy driven currents caused by melting. In water baths with temperatures between…Michael Berhanu, Amit Dawadi, Martin Chaigne et al.·Dec 20, 2024SaveLearn
Active Flow Control for Bluff Body under High Reynolds Number Turbulent Flow Conditions Using Deep Reinforcement LearningThis study employs Deep Reinforcement Learning (DRL) for active flow control in a turbulent flow field of high Reynolds numbers at Re=274000. That is, an agent is trained to obtain a control…Jingbo Chen, Enrico Ballini, Stefano Micheletti·Dec 20, 2024SaveLearn
What determines the breakup length of a jet?The breakup of a capillary jet into drops is believed to be governed by initial disturbances on the surface of the jet that grow exponentially. The disturbances are often assumed to be due to…Stefan Kooij, Daniel T. A. Jordan, Cees J. M. van Rijn et al.·Dec 20, 2024SaveLearn
From annular cavity to rotor-stator flow: nonlinear dynamics of axisymmetric rollsSpatio-temporally complex flows are found at the onset of unsteadiness in (axisymmetric) rotor-stator turbulence in the shape of concentric rolls. The emergence of these rolls is rationalised using a…Artur Gesla, Patrick Le Quéré, Yohann Duguet et al.·Dec 20, 2024SaveLearn
Effect of three-orifice baffles orientation on the flow and thermal-hydraulic performance: experimental analysis for net and oscillatory flowsThree-orifice baffles equally spaced along a circular tube are investigated as a means for heat transfer enhancement under net, oscillatory and compound flows. An unprecedented, systematic analysis…J. Muñoz-Cámara, D. Crespí-Llorens, J. P. Solano et al.·Dec 20, 2024SaveLearn
Locomotion on a lubricating fluid with spatial viscosity variationsWe studied locomotion of a crawler on a thin Newtonian fluid film whose viscosity varied spatially. We first derived a general locomotion velocity formula with fluid viscosity variations via the…Takahiro Kanazawa, Kenta Ishimoto·Dec 20, 2024SaveLearn
Oscillations of a Water Droplet on a Horizontally Vibrating SubstrateDeformed droplets are ubiquitous in various industrial applications, such as inkjet printing, lab-on-a-chip devices, and spray cooling, and can fundamentally affect the involved applications both…King L. Ng, Luís H. Carnevale, Michał Klamka et al.·Dec 19, 2024SaveLearn
Turbulent dissipative coupling in nanoscale multimode superfluid acousticsSuperfluid helium, the inviscid low-temperature phase of liquid \4He, enables investigation of flows with reduced dimensionality since, due to the vanishing viscosity, sub-micron flow channels can be…Filip Novotný, Marek Talíř, Emil Varga·Dec 19, 2024SaveLearn
Reaction-limited evaporation for the color-gradient lattice Boltzmann modelWe present a method to achieve reaction-limited evaporation for the color-gradient lattice Boltzmann multicomponent model. Our approach involves a systematic way to remove fluid mass from the…Gaurav Nath, Othmane Aouane, Jens Harting·Dec 19, 2024SaveLearn
Influence of Diaphragm Dynamics on Shock Wave Propagation in Double-Diaphragm Shock TubesShock tubes have become indispensable tools for advancing research across diverse fields such as aerodynamics, astrophysics, chemical kinetics, and industrial applications. The present study examines…Touqeer Anwar Kashif, Janardhanraj Subburaj, Md Zafar Ali Khan et al.·Dec 19, 2024SaveLearn
Measurements and modelling of induced flow in collective vertical migrationHydrodynamic interactions between swimming or flying organisms can lead to complex flows on the scale of the group. These emergent fluid dynamics are often more complex than a linear superposition of…Nina Mohebbi, Joonha Hwang, Matthew K. Fu et al.·Dec 19, 2024SaveLearn
Short-term wind forecasting via surface pressure measurements: stochastic modeling and sensor placementWe propose a short-term wind forecasting framework for predicting real-time variations in atmospheric turbulence based on nacelle-mounted anemometer and ground-level air-pressure measurements. Our…Seyedalireza Abootorabi, Stefano Leonardi, Mario Rotea et al.·Dec 18, 2024SaveLearn
ZipGAN: Super-Resolution-based Generative Adversarial Network Framework for Data Compression of Direct Numerical SimulationsThe advancement of high-performance computing has enabled the generation of large direct numerical simulation (DNS) datasets of turbulent flows, driving the need for efficient…Ludovico Nista, Christoph D. K. Schumann, Fabian Fröde et al.·Dec 18, 2024SaveLearn
Recent developments and research needs in turbulence modeling of hypersonic flowsHypersonic flow conditions pose exceptional challenges for Reynolds-Averaged Navier-Stokes (RANS) turbulence modeling. Critical phenomena include compressibility effects, shock/turbulent boundary…Pratikkumar Raje, Eric Parish, Jean-Pierre Hickey et al.·Dec 18, 2024SaveLearn
Reducing Foam Friction with Self Slippery Liquid-Infused Porous SurfacesAcquiring a comprehensive understanding of the interplay between foam friction and surface roughness is essential for achieving precise control over their flow dynamics. In particular, a major…Alexis Commereuc, Emmanuelle Rio, François Boulogne·Dec 18, 2024SaveLearn
Modeling the free-surface magnetohydrodynamics of thick liquid metal walls for fusionRenaissance Fusion proposes thick liquid metal walls as plasma-facing components for future commercial fusion reactors. It designs and operates proof-of-concept experiments aiming at actively…Valentina Giovacchini, Eric Favre, Francesco A. Volpe·Dec 18, 2024SaveLearn