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 paper demonstrates that a physics-guided surrogate learning approach, which trains reinforcement learning policies on turbulent channel flows matching wing boundary-layer statistics, enables zero-shot control of a NACA4412 wing that achieves significant drag reductions while drastically lowering computational costs compared to traditional on-wing training.
This paper establishes a Hamiltonian framework for vortex clusters on a flat torus using the Schottky-Klein prime function, deriving a universal small-cluster expansion that reduces collective dynamics to a closed description governed by a single complex quadrupole moment, a prediction validated by numerical simulations.
This study utilizes a one-dimensional capillary fiber bundle model to demonstrate that hydraulic fracturing enhances fluid extraction efficiency by lowering capillary thresholds, identifying an optimal pressure gradient that maximizes flow rates and enables the detection of extraction conditions through computationally efficient analysis of local flow profiles and Shannon entropy.
This paper demonstrates that continuous viscosity stratification in gravity-driven falling films can induce a surface-mode instability in the zero-inertia (Stokes) limit, driven by a phase shift between perturbation vorticity and interface displacement that reinforces deformation, thereby extending the class of scalar-mediated, inertialess instabilities beyond traditional surfactant-driven Marangoni effects.
This study reveals that immotile microbial colonies, such as yeast, can achieve long-range dispersal in physically confining environments by metabolically generating CO bubbles that fracture the surrounding matrix and hydrodynamically entrain cells, establishing a novel mode of population-scale motion termed "metabolically driven active matter."
This numerical study employs a high-fidelity 3D OpenFOAM solver to demonstrate that increasing viscoelastic relaxation time significantly enhances droplet spreading and reduces height, whereas higher surface tension suppresses expansion, while sharp wettability contrasts on hybrid surfaces induce asymmetric spreading and distinctive equilibrium morphologies driven by the coupled effects of elastic energy storage and capillary forces.
This paper proposes a helicity-conservative, domain-decomposed physics-informed neural network framework that computes vorticity via automatic differentiation and employs overlapping spatial decomposition with causal temporal continuation to achieve stable, long-time simulations of incompressible non-Newtonian flows.
This paper presents a hydro-elastic theory demonstrating that slender elastic floaters in gravity waves undergo a wave-induced second-order mean yaw moment that drives them toward a preferential orientation, where soft, short, and heavy structures align longitudinally while stiff, long, and light ones align transversely.
This paper investigates the laminar pathway of planet formation by demonstrating that dust-induced adjustments in vortex vorticity inevitably lead to elliptical instability and destruction, thereby imposing an upper limit on vortex lifetimes that may prevent the formation of planetesimals.
This paper demonstrates that a cousin of the streaming instability remains active within vortices by extending resonant drag instability theory to non-modal waves in a vortex-following shearing box, thereby strengthening the case for vortex-induced planetesimal formation while clarifying the nature of dust-driven vortex instabilities.