1218 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 demonstrates through direct numerical simulations that incorporating helicity effects alongside Smagorinsky-like eddy viscosity improves subgrid-scale modeling in large-eddy simulations by addressing the over-dissipative behavior of standard models.
This paper presents a minimal mean-field elastohydrodynamic model that couples contact mechanics and lubrication to theoretically characterize frictional transitions along the Stribeck curve, deriving asymptotic expressions for friction in boundary, mixed, and hydrodynamic regimes and generalizing the classical Stribeck curve into a multidimensional phase diagram governed by dimensionless speed, load, and surface roughness.
This paper presents a physics-guided, differentiable correlation for predicting the laminar flame speed of methane-hydrogen-air mixtures under varying dilution conditions, offering accuracy comparable to machine learning models while ensuring physical consistency and robust extrapolation for use in computational fluid dynamics and fuel-flexible combustion control.
This paper investigates the stationary sliding and dynamic behaviors of compound drops composed of two immiscible liquids on an inclined substrate using a mesoscopic hydrodynamic model, analyzing how their configuration and velocity depend on inclination, volume ratio, and viscosity ratio while also exploring time-periodic fusion-overtaking-splitting dynamics beyond the stationary regime.
This paper demonstrates that unsaturated flow in fractured rock exhibits a distinct two-branch retention behavior driven by fracture-matrix flow partitioning, which is explained through a newly derived analytical framework identifying a critical saturation that marks the transition between matrix- and fracture-dominated regimes.
This study evaluates and adapts two existing models for thermodiffusive instabilities in lean premixed turbulent hydrogen-air flames using 91 DNS cases, revealing that while both models are physically equivalent and reduce to a Karlovitz-number-dependent form under typical conditions, explicit consideration of specific stability parameters is necessary for accurate scaling in ultra-low flame speed regimes.
This paper establishes a sufficient stability condition for nonlinear dissipative partial differential equations by deriving an explicit inequality linking linear dissipation, quadratic nonlinearity, and external forcing, and demonstrates its applicability to fluid dynamics models like the Burgers, KPP-Fisher, and Kuramoto-Sivashinsky equations.
This study utilizes high-speed imaging to demonstrate that the properties of infused lubricants (silicone oil vs. hexadecane) have an insignificant effect on the spreading and rebound dynamics of droplets impacting liquid-impregnated surfaces with varying micro-textures across a wide range of Weber numbers.
This paper presents a data-driven Mori-Zwanzig surrogate model that accurately captures both short-time point-wise and long-time statistical behaviors of Lagrangian particles in turbulent flows by learning from resolved dynamics and unresolved history, thereby enabling efficient simulation without full direct numerical simulations.
This study investigates ethanol/air spray flamelets in a novel tubular counterflow configuration, revealing that increased curvature significantly alters evaporation profiles and reduces the stretch-induced extinction limit through mechanisms distinct from those observed in gas flamelets.