1265 papers
Fluid dynamics explores how liquids and gases move, shaping everything from weather patterns to the flow of blood through our veins. This field bridges the gap between abstract mathematical equations and the tangible forces that drive our physical world, offering insights into turbulence, aerodynamics, and fluid behavior in complex environments.
On Gist.Science, we process every new preprint in this category directly from arXiv to make cutting-edge research accessible to everyone. Each paper is transformed into a clear, plain-language overview alongside a detailed technical summary, ensuring both students and experts can grasp the latest findings without getting lost in dense jargon.
Below, you will find the most recent studies in fluid dynamics, curated and explained for a broader audience.
This paper proposes a sequential data assimilation framework using the Ensemble Kalman Filter and Proper Orthogonal Decomposition to overcome the limitations of potential flow theory and efficiently reconstruct complex, nonlinear wave dynamics, including breaking waves, in Volume-of-Fluid-based numerical wave tanks.
Through simplified 3D MHD simulations and phenomenological analysis, this study identifies an asymptotic ultimate regime for the solar dynamo at large magnetic Reynolds numbers characterized by inter-hemispheric helicity fluxes, while highlighting that current global simulations remain trapped in non-asymptotic, parameter-sensitive regimes and outlining strategies to reach the true asymptotic state in realistic models.
This paper introduces a fluctuating Darcy model to demonstrate that space- and time-dependent porosity fluctuations significantly enhance or modify the hydrodynamic permeability of porous membranes compared to static matrices, offering new insights for optimizing membrane design.
This study utilizes direct numerical simulations and a non-Markovian stochastic framework to demonstrate that while correlated collisions only accelerate the initial growth of "lucky droplets," turbulence-induced intermittency significantly reduces the time required for these droplets to overcome the size gap and trigger precipitation.
This paper introduces cfdmfFTFoam, a novel OpenFOAM-based Front-Tracking solver designed for multiphase flows on general unstructured grids, which addresses the scarcity of open-source FTM tools by integrating advanced algorithms for front mesh communication, advection, and correction to enable accurate and efficient simulations in both serial and parallel environments.
This paper constructs and classifies multi-stagnation-point self-similar solutions to the two-dimensional incompressible Euler equations, which feature velocity cusps along rays, while proving that such multi-stagnation configurations are impossible for homogeneous self-similar solutions with bounded vorticity away from the origin.
Using a dynamically scaled robotic pleopod, this study demonstrates that the cupping angle () of a shrimp's exopodite acts as a critical geometric control parameter that optimizes the thrust-lift balance by modulating projected area and maintaining leading-edge vortex coherence, thereby enabling the propulsor to function as a hybrid drag- and lift-based system independent of stroke kinematics.
This study proposes a novel two-step global proper orthogonal decomposition framework that significantly enhances the robustness and computational efficiency of reduced-order models for two-dimensional cylinder flow by selectively retaining relevant flow conditions, thereby achieving accurate predictions with approximately 50% lower computational cost compared to conventional methods.
This paper presents an analytical and numerical study of steady, advection-modulated gaseous diffusion through an orifice separating dissimilar gases, deriving mass transfer rates and required overpressure as functions of the Schmidt and Péclet numbers while accounting for the coupled effects of viscosity and density variations, with specific applications to hydrogen-air and hydrogen-water vapor mixtures.
This study numerically investigates rapidly rotating Rayleigh-Bénard convection on a tilted -plane, revealing that increasing colatitude transforms large-scale vortices into zonal flows, reduces global heat and momentum transport due to broken rotation symmetry, and maintains a persistent unstable mean temperature gradient through lateral thermal mixing.