967 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 study demonstrates that the vorticity packing fraction in decaying two-dimensional Navier-Stokes turbulence governs the transition from point-vortex to finite-size vortex equilibria, which in turn dictates a corresponding shift in Lagrangian tracer transport from sub-diffusive orbital trapping to super-diffusive linear motion as packing increases.
This paper introduces DIANO, a differentiable autoencoding neural operator framework that constructs interpretable, low-dimensional latent spaces governed by embedded partial differential equations to enable efficient, physics-consistent reconstruction of high-fidelity spatiotemporal data across varying spatial discretizations.
This study combines synchronized laboratory experiments and high-resolution simulations to characterize the transient growth, transport, and saturation of finger-type double-diffusive convection, revealing a three-stage fingertip evolution where increasing salinity contrast drives a transition from symmetric vortex-ring transport to asymmetric, shear-induced lateral drift.
This paper demonstrates that core-collapse supernovae sustain galactic turbulence by generating incompressible modes through baroclinic vorticity at unstable contact discontinuities, where small-scale shell instabilities produce a spectrum that, via vortex stretching and an inverse cascade, imprints itself onto kiloparsec scales to drive the large-scale turbulence cascade.
This paper presents the first exact Eulerian reformulation of isothermal compressible Navier-Stokes flow into Schrödinger-type amplitude variables, transforming the system into nonlinear imaginary-time equations with self-consistent potentials that are verified against direct simulations and offer potential applications for reduced flow descriptions and quantum algorithms.
Hydrodynamical simulations of elliptical galaxies demonstrate that effective AGN feedback capable of suppressing star formation through turbulence generation occurs only when both jets and winds operate simultaneously, as their interaction drives the Kelvin-Helmholtz instability necessary to produce the required shear and energy dissipation.
This study employs numerical simulations based on the lubrication approximation to demonstrate that the asymmetric morphology of a droplet freezing on an inclined surface is primarily governed by the interplay between sliding-induced deformation, substrate wettability, and inclination, where early-time dynamics and the competition between gravity and capillarity determine the formation of tilted ice cusps and contact-angle hysteresis.
This study utilizes high-fidelity numerical simulations to demonstrate that while permeability heterogeneity generally accelerates gravity current migration and enhances dissolution through dispersive effects, the interplay between instability size, correlation length, and density stratification ultimately determines dissolution efficiency, with homogeneous media often outperforming heterogeneous ones except at low Rayleigh numbers.
This study demonstrates that adjusting the orientation angle and eccentricity of a wire within a nozzle significantly modulates Rayleigh-Plateau instability regimes and bead characteristics, with the angle exerting a dominant influence, while an empirical scaling analysis unifies the governing forces to offer practical insights for industrial fluid dynamics manipulation.
This paper revisits and extends Belen'kii & Fradkin's 1965 theoretical model for variable-density Rayleigh-Taylor turbulence, demonstrating that the full similarity equation accurately captures non-Boussinesq flow features and that a mass-corrected simplified solution effectively approximates the complex mixing dynamics governed by the competition between diffusion and mass conservation.