Two-dimensional heat transfer and melt flow in the laser-impact zone at selective laser melting of thin walls -- II: ModelingPart II of the present work concerns modeling and analyzing the experimental data obtained in Part I. A computational fluid dynamics (CFD) model of two-dimensional conductive heat transfer and…Andrey V. Gusarov, Tatiana V. Tarasova, Sergey N. Grigoriev·Sep 26, 2024SaveLearn
FlowBench: A Large Scale Benchmark for Flow Simulation over Complex GeometriesSimulating fluid flow around arbitrary shapes is key to solving various engineering problems. However, simulating flow physics across complex geometries remains numerically challenging and…Ronak Tali, Ali Rabeh, Cheng-Hau Yang et al.·Sep 26, 2024SaveLearn
Initial release styles have limited effects on the hydrodynamic dynamics of a self-propelled fin in the unsteady wakesLiving fish may suddenly encounter upstream obstacles, join the queue of the fish schooling, or detect upstream flow in advance, resulting in interactions with environmental vortices that can be…Peng Han, Dong Zhang, Jun-Duo Zhang et al.·Sep 26, 2024SaveLearn
Small Leidenfrost droplet dynamicsAn isolated Leidenfrost droplet levitating over its own vapor above a superheated flat substrate is considered theoretically, the superheating for water being up to several hundred degrees above the…Benjamin Sobac, Alexey Rednikov, Pierre Colinet·Sep 26, 2024SaveLearn
Physics-aligned Schr\"odinger bridgeThe reconstruction of physical fields from sparse measurements is pivotal in both scientific research and engineering applications. Traditional methods are increasingly supplemented by deep learning…Zeyu Li, Hongkun Dou, Shen Fang et al.·Sep 26, 2024SaveLearn
The global flow state in a precessing cylinderWe examine the fluid flow forced by precession of a rotating cylindrical container using numerical simulations and experimental flow measurements with ultrasonic Doppler velocimetry (UDV). The…André Giesecke, Tobias Vogt, Federico Pizzi et al.·Sep 26, 2024SaveLearn
An Experimental Configuration to Study High-Enthalpy Radiating Flows Under Nonequilibrium De-excitationThis paper introduces an experimental configuration, called the Prandtl-Meyer plus duct arrangement (PMD), designed to study high-enthalpy radiating flows undergoing nonequilibrium de-excitation. The…Zhuo Liu, Tiantian Chen, Jiaao Hao et al.·Sep 26, 2024SaveLearn
Higher-order moments of the Mott-Smith shock approximationThis technical note reports the expression of selected higher-order moments associated with the Mott-Smith solution of the shock-wave profile. The considered moments are the pressure tensor, the…Stefano Boccelli·Sep 26, 2024SaveLearn
Improving the Vector Basis Neural Network for RANS Equations Using Separate TrainingsWe present a new data-driven turbulence model for Reynolds-averaged Navier-Stokes equations called t-Vector Basis Neural Network. This new model, grounded on the already existing Vector Basis…Davide Oberto·Sep 26, 2024SaveLearn
Emergence of capillary waves in miscible co-flowing fluidsWe show that capillary waves can exist at the the boundary between miscible co-flowing fluids. We unveil that the interplay between transient interfacial stresses and confinement drives the…Alessandro Carbonaro, Giovanni Savorana, Luca Cipelletti et al.·Sep 25, 2024SaveLearn
Linear stability analysis of wall-bounded high-pressure transcritical fluidsMixing and heat transfer rates are typically enhanced when operating at high-pressure transcritical turbulent flow regimes. The rapid variation of thermophysical properties in the vicinity of the…Marc Bernades, Francesco Capuano, Lluis Jofre·Sep 25, 2024SaveLearn
Boundary layer stability analysis using the nonlinear One-Way Navier-Stokes approachWe extend the One-Way Navier Stokes (OWNS) approach to support nonlinear interactions between waves of different frequencies, which will enable nonlinear analysis of instability and transition. In…Michael K. Sleeman, Matthew T. Lakebrink, Tim Colonius·Sep 25, 2024SaveLearn
A comparison of h- and p-refinement to capture wind turbine wakesThis paper investigates a critical aspect of wind energy research - the development of wind turbine wake and its significant impact on wind farm efficiency. The study focuses on the exploration and…Hatem Kessasra, Marta Cordero-Gracia, Mariola Gómez et al.·Sep 25, 2024SaveLearn
Dispersion and mixing in heterogeneous compressible porous media under transient forcingPeriodic forcing of flow in compressible porous media is an important driver for solute dispersion and mixing in geological and engineered porous media subject for example to tides, pumping and…Satoshi Tajima, Marco Dentz·Sep 25, 2024SaveLearn
Biglobal linear stability analysis of a ducted 2D premixed flame: intrinsic thermoacoustic mode and role of exceptional pointIn this work, we aim to establish a detailed description of the physical mechanisms of intrinsic thermoacoustic modes and their interplay with duct acoustic modes. The biglobal linear stability…Lu Chen, Yu Lv·Sep 25, 2024SaveLearn
Modeling of thin liquid films with arbitrary many layersWe propose the generalization of the thin film equation (TFE) to arbitrarily many immiscible liquid layers. Then, we provide different pathways for deriving the hydrodynamic pressure within the…Tilman Richter, Paolo Malgaretti, Jens Harting·Sep 25, 2024SaveLearn
Applications and Novel Regularization of the Thin-Film EquationThe classical no-slip boundary condition of the Navier-Stokes equations fails to describe the spreading motion of a droplet on a substrate due to the missing small-scale physics near the contact…Khang Ee Pang·Sep 25, 2024SaveLearn
Liquid sloshing behaviours in an elastic tank and suppression effect of bafflesIn this paper, a fluid-structure interaction (FSI) framework based on the smoothed particle hydrodynamics (SPH) method is employed to investigate the forces and deformations experienced by LNG tanks…Chenxi Zhao, Yan Wu, Yongchuan Yu et al.·Sep 24, 2024SaveLearn
Transient bubble rising in the presence of a surfactant at very low concentrationsWe study the formation of the dynamic adsorption layer when a bubble is released in a tank containing water with a tiny amount of surfactant. The influence of the sorption kinetic constants is…D. Fernández-Martínez, M. G. Cabezas, J. M. López-Herrera et al.·Sep 24, 2024SaveLearn
Stokes flow around two unequal cylinders: A complex variable approachWe solve the Stokes equations for the flow around two parallel translating and rotating cylinders using tools from complex analysis and conformal mapping. By considering cylinders of arbitrary size…Luke Neville·Sep 24, 2024SaveLearn
Reynolds number effects on turbulent flow in curved channelsIn this work, we study the flow in curved channels, an archetypal configuration that allows insights into problems featuring turbulence bounded by curved walls. Besides its relevance to many…Giulio Soldati, Paolo Orlandi, Sergio Pirozzoli·Sep 24, 2024SaveLearn
The interplay of plasticity and elasticity in elastoviscoplastic flows in wavy channelsElastoviscoplastic (EVP) fluids, which exhibit both solid-like and liquid-like behavior depending on the applied stress, are critical in industrial processes involving complex geometries such as…Mohamed S. Abdelgawad, Simon J. Haward, Amy Q. Shen et al.·Sep 24, 2024SaveLearn
L-moments reveal the scales of momentum transport in dense canopy flowsThe interaction between a dense forest canopy and atmosphere is a complex fluid-dynamical problem with a wide range of practical applications, spanning from the aspects of carbon sequestration to the…Subharthi Chowdhuri, Olli Peltola·Sep 24, 2024SaveLearn
Experimental characterization of shock-separation interaction over wavy-shaped geometries through feature analysisA canonical wavy surface exposed to a Mach 2 flow is investigated through high-frequency Pressure Sensitive Paint (PSP), Kulite measurements, and shadowgraph imaging. The wavy surface features a…J. Braun, I. Rahbari, G. Paniagua et al.·Sep 24, 2024SaveLearn
Enhancing heat transfer in a channel with unsteady flow perturbationsWe compute unsteady perturbations that optimally increase the heat transfer (Nu) of optimal steady unidirectional channel flows, for a given average rate of power consumption Pe2. The…Silas Alben, Shivani Prabala, Mitchell Godek·Sep 23, 2024SaveLearn