Stokes flow of incompressible liquid through a conical diffuser with partial slip boundary conditionAn alternative form of the general solution of the linearized stationary Navier-Stokes equations for an incompressible fluid in spherical coordinates is obtained by the vector potential method. A…Peter Lebedev-Stepanov·Nov 24, 2024SaveLearn
Conjugate Heat Transfer Effects on Bubble Growth During Flow Boiling Heat Transfer in MicrochannelsFlow boiling in microchannel heat sinks is an efficient way to dissipate high heat flux by utilizing the large surface-to-volume ratio and high latent heat. Previous studies of boiling heat transfer…Odumuyiwa A. Odumosu, Hongying Li, Tianyou Wang et al.·Nov 24, 2024SaveLearn
Manipulating the direction of turbulent energy flux via tensor geometry in a two-dimensional flowIn turbulent flows, energy flux refers to the transfer of kinetic energy across different scales of motion, a concept that is a cornerstone of turbulence theory. The direction of net energy flux is…Xinyu Si, Filippo De Lillo, Guido Boffetta et al.·Nov 23, 2024SaveLearn
Excitation and stability of nonlinear compressible G\"ortler vortices and streaks induced by free-stream vortical disturbancesWe study the generation, nonlinear development and secondary instability of unsteady G\"ortler vortices and streaks in compressible boundary layers exposed to free-stream vortical disturbances and…Dongdong Xu, Pierre Ricco, Elena Marensi·Nov 23, 2024SaveLearn
From wicking to anti-wicking: A universal framework for capillary dynamicsThe dynamics of capillary rise under different geometric and fluid conditions have the common signatures of rapid rise followed by an equilibrium state that describe the underlying competing forces.…Aniruddha Saha, Sadaf Sobhani·Nov 23, 2024SaveLearn
Discrepancy in Oil Displacement Mechanisms at the Equivalent Interfacial Tensions: Differentiating Contributions from Surfactant and Nanoparticles on Interfacial ActivitiesThis study examines discrepancies in oil displacement mechanisms at equivalent interfacial tensions, focusing on the distinct contributions of surfactants and nanoparticles. It was hypothesized that…Suparit Tangparitkul, Thakheru Akamine, David Harbottle et al.·Nov 23, 2024SaveLearn
Minimizing Nature's Cost: Exploring Data-Free Physics-Informed Neural Network Solvers for Fluid Mechanics ApplicationsIn this paper, we present a novel approach for fluid dynamic simulations by harnessing the capabilities of Physics-Informed Neural Networks (PINNs) guided by the newly unveiled principle of minimum…Abdelrahman Elmaradny, Ahmed Atallah, Haithem Taha·Nov 23, 2024SaveLearn
Determination of the Young's angle using static friction in capillary bridgesRecently contact angle hysteresis in two-dimensional droplets lying on a solid surface has been studied extensively in terms of static friction due to pinning forces at contact points. Here we…Jong-In Yang, Jooyoo Hong·Nov 22, 2024SaveLearn
Non-resonant effects in pilot-wave hydrodynamicsPilot-wave hydrodynamics concerns the dynamics of 'walkers,' droplets walking on a vibrating bath, and has provided the basis for the burgeoning field of hydrodynamic quantum analogs. We here explore…Bauyrzhan K. Primkulov, Davis J. Evans, Joel B. Been et al.·Nov 22, 2024SaveLearn
Coupled dynamics of wall pressure and transpiration, with implications for the modeling of tailored surfaces and turbulent drag reductionWall-based active and passive flow control for drag reduction in low Reynolds number (Re) turbulent flows can lead to three typical phenomena: i) attenuation or ii) amplification of the near-wall…Simon Toedtli, Anthony Leonard, Beverley McKeon·Nov 21, 2024SaveLearn
CoNFiLD-inlet: Synthetic Turbulence Inflow Using Generative Latent Diffusion Models with Neural FieldsEddy-resolving turbulence simulations require stochastic inflow conditions that accurately replicate the complex, multi-scale structures of turbulence. Traditional recycling-based methods rely on…Xin-Yang Liu, Meet Hemant Parikh, Xiantao Fan et al.·Nov 21, 2024SaveLearn
Direct Numerical Simulations of K-type transition in a flat-plate boundary layer with supercritical fluidsWe investigate the controlled K-type breakdown of a flat-plate boundary-layer with highly non-ideal supercritical fluid at a reduced pressure of pr,∞=1.10. Direct numerical simulations are…Pietro Carlo Boldini, Benjamin Bugeat, Jurriaan W. R. Peeters et al.·Nov 21, 2024SaveLearn
Learning Pore-scale Multi-phase Flow from Experimental Data with Graph Neural NetworkUnderstanding the process of multiphase fluid flow through porous media is crucial for many climate change mitigation technologies, including CO2 geological storage, hydrogen storage, and fuel…Yuxuan Gu, Catherine Spurin, Gege Wen·Nov 21, 2024SaveLearn
Pore-scale imaging of hydrogen and methane storage in fractured aquifer rock: The impact of gas type on relative permeabilityUnderground hydrogen storage in saline aquifers is a potential solution for seasonal renewable energy storage. Among potential storage sites, facilities used for underground natural gas storage have…Sojwal Manoorkar, Gülce Kalyoncu, Hamdi Omar et al.·Nov 21, 2024SaveLearn
Equivalent slip length of flow around a super-hydrophobic cylinderIn this research, a two-dimensional numerical simulation is conducted to determine the equivalent wall slip length for flow around a circular cylinder featuring a super-hydrophobic surface. The…Zhi-yong Li, Ya-kang Xiao, Yan-cheng Li et al.·Nov 21, 2024SaveLearn
The efficient implementation of transport velocity formulationThe standard smoothed particle hydrodynamics (SPH) method suffers from tensile instability, resulting in particle clumping and void regions under negative pressure conditions. In this study, we…Zhentong Wang, Oskar J. Haidn, Xiangyu Hu·Nov 21, 2024SaveLearn
Simulating squirmers with smoothed particle dynamicsMicroswimmers play an important role in shaping the world around us. The squirmer is a simple model for microswimmer whose cilia oscillations on its spherical surface induce an effective slip…Xinwei Cai, Kuiliang Wang, Gaojin Li et al.·Nov 21, 2024SaveLearn
FLRNet: A Deep Learning Method for Regressive Reconstruction of Flow Field From Limited Sensor MeasurementsMany applications in computational and experimental fluid mechanics require effective methods for reconstructing the flow fields from limited sensor data. However, this task remains a significant…Phong C. H. Nguyen, Joseph B. Choi, Quang-Trung Luu·Nov 21, 2024SaveLearn
Gaussian Integral Method for Void FractionA novel method, the Gaussian Integral Method (GIM), is presented for calculating void fractions in Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) simulations. GIM is versatile and…Alireza Kianimoqadam, Justin L. Lapp·Nov 21, 2024SaveLearn
Optimization of Second-Order Transport Models for Transition-Continuum FlowsModeling transition-continuum hypersonic flows poses significant challenges due to thermodynamic nonequilibrium and the associated breakdown of the continuum assumption. Standard continuum models…Mikolaj Kryger, Jonathan F. MacArt·Nov 20, 2024SaveLearn
CFD-based design optimization of a 5 kW ducted hydrokinetic turbine with practical constraintsDucted hydrokinetic turbines enhance energy-harvesting efficiency by better conditioning the flow to the blades, which may yield higher power output than conventional freestream turbines for the same…Jeongbin Park, Marco Mangano, Sabet Seraj et al.·Nov 20, 2024SaveLearn
Online Optimisation of Machine Learning Collision Models to Accelerate Direct Molecular Simulation of Rarefied Gas FlowsWe develop an online optimisation algorithm for in situ calibration of collision models in simulations of rarefied gas flows. The online optimised collision models are able to achieve similar…Nicholas Daultry Ball, Jonathan F. MacArt, Justin Sirignano·Nov 20, 2024SaveLearn
Modeling the effect of hydrodynamic wakes in dynamical models of large-scale fish schoolsA novel model of the wake of swimming fish is developed and incorporated into a dynamical model of a fish school to explore the effect of hydrodynamics on the emergent behavior in schooling fish. The…Ji Zhou, Jung-Hee Seo, Rajat Mittal·Nov 20, 2024SaveLearn
The influence of free-stream turbulence on the fluctuating loads experienced by a cylinder exposed to a turbulent cross-flowThe impact of several ``flavours" of free-stream turbulence (FST) on the structural response of a cantilevered cylinder, subjected to a turbulent cross-flow is investigated. At high enough…Francisco J. G. de Oliveira, Zahra Sharif Khodaei, Oliver R. H. Buxton·Nov 20, 2024SaveLearn
Extreme firebrand transport by atmospheric waves in wildfiresIn wildfires, burning pieces of ember-firebrands-are carried downstream by wind. At the time of landing, these firebrands can start secondary fires far away from the main burning unit. This…Mohammad Farazmand·Nov 20, 2024SaveLearn