1257 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 presents a complete description of star-shaped oscillating water drops by analyzing the coupling between surface motion and azimuthal oscillation, leading to a new dispersion relation that significantly improves the accuracy of predicted oscillating frequencies compared to previous quasi-2D models.
This paper presents a numerical study using the vortex filament model to demonstrate that superfluid He flowing past a rough wall at sustains a polarized ultraquantum turbulence state above a critical velocity, characterized by a parabolic velocity profile with wall slip and a friction force proportional to the flow speed.
This paper rigorously derives a macroscopic two-phase flow model for inhomogeneous porous media by upscaling the Navier-Stokes-Cahn-Hilliard equations via volume averaging, incorporating wetting behavior into the averaged chemical potential and validating the framework through numerical simulations.
This study demonstrates that applying the Hilbert transform directly to standard Proper Orthogonal Decomposition (POD) modes offers a computationally efficient and artifact-free method for identifying propagating turbulent structures in a sphere's near wake, effectively replicating the results of the more complex Hilbert POD technique.
This paper presents a physics-based model for predicting wake-added turbulence intensity in wind farms by analyzing turbulent kinetic energy and Reynolds stress budgets, offering a more accurate and practical alternative to existing empirical or axially symmetric approaches.
This paper validates the hypothesis that structure tensors provide a sufficient statistical description for turbulence by demonstrating that equivariant neural networks utilizing these tensors yield significantly more accurate Reynolds-averaged Navier-Stokes closures for the rapid pressure-strain term compared to existing models.
This paper proposes a corrected open boundary framework based on the Multiple-relaxation-time (MRT) lattice Boltzmann method for immiscible pseudopotential models, which significantly reduces spurious currents and ensures global mass conservation through improved inlet reconstruction, dynamic outlet velocity adjustment, and viscosity-based stability tuning, as validated by four benchmark simulations showing high accuracy in droplet morphology and flow behavior.
This paper establishes an asymptotic theory and identifies four distinct scaling regimes to predict the maximum separation efficiency of colloidal particles via diffusiophoresis in internal flows, revealing how reaction kinetics and chemical permeation mechanisms govern the process and validating these findings through microfluidic experiments driven by CO2 gradients.
This paper investigates the stability of vortex-induced vibrations in multiple freely oscillating bodies by deriving a Linear Arbitrary Lagrangian Eulerian method and proposing a low-cost impedance-based criterion to accurately predict instability thresholds, which are validated through global stability analysis and extensive parametric studies on tandem and three-body cylinder systems.
This study integrates experimental, numerical, and theoretical approaches to characterize the cavity dynamics and acoustic signatures of a conical-nosed projectile during water entry, revealing that boundary effects significantly elevate the dominant oscillation frequency above the Minnaert limit and that this frequency decreases linearly with increasing Froude number.