1011 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 derives invariant Green functions for Stokes flow in cylindrical geometries using a bitensorial harmonic expansion to obtain higher-order singularities, which are subsequently applied to model hydrodynamic interactions between active and passive colloids and cylindrical boundaries.
This study compares three global sensitivity analysis methods (Sobol, Morris, and modified activity scores) on chaotic flow mixing models of varying complexity, demonstrating that the computationally efficient Morris method provides reliable results comparable to more expensive techniques, thereby offering a practical approach for optimizing engineered injection and extraction systems.
This study demonstrates that in metal-rich protoplanetary disks, the back-reaction of solids on gas significantly alters low-mass planet migration torques—often reversing their direction—rendering simple linear metallicity rescalings unreliable and necessitating fully coupled hydrodynamic simulations for accurate predictions.
By applying explainable deep learning to turbulent channel flow, this study reveals that near-wall turbulence is hierarchically organized with dissipation as the dominant mechanism constraining production and viscous diffusion, a structure that breaks down in the outer layer where no single classical coherent structure can represent the turbulent kinetic energy budget.
This paper presents a numerically consistent, non-Boussinesq subgrid-scale stress model for large-eddy simulation that leverages data assimilation and multi-task learning to achieve enhanced convergence and improved predictions of turbulent boundary layers under adverse pressure gradients compared to the Dynamic Smagorinsky model.
This study reveals that impact-induced viscoelastic "bungee-jumper" jets exhibit uniform extensional rates and stress distributions despite extreme Deborah and Reynolds numbers, indicating that their complex dynamics can be effectively modeled using spatially uniform constitutive equations, with the Voigt model providing the best agreement.
This paper calculates the effective longitudinal slip length for a rectangularly grooved surface fully wetted by a nearly inviscid lubricant, revealing that unlike in superhydrophobic surfaces, the lubricant's flow plays a dominant and singular role in this encapsulated configuration.
This paper introduces a new weak formulation of the 3D Euler and inviscid MHD equations using Bony paradifferential calculus to establish a rigorous local helicity balance, derive weaker sufficient conditions for helicity conservation, relate defect measures to third-order structure functions, and prove that weak solutions arising from viscous limits preserve the divergence-free property.
This paper introduces new definitions of helicity and cross-helicity densities for non-barotropic compressible Euler and ideal MHD equations that remove the restrictive barotropic pressure assumption, revealing that while global conservation is lost, the rate of change of these quantities depends solely on potential vorticity and kinetic energy, thereby enabling the derivation of an inverse resolution length scale bounded by initial potential vorticity.
This paper proposes and validates a generalized method of fundamental solutions (MFS) for the regularized 13-moment equations in rarefied gas flows, demonstrating its superior convergence and efficiency over the finite element method through applications to both analytical and thermally-induced non-coaxial cylinder flow problems.