1229 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 utilizes direct numerical simulations to analyze magnetoconvection under uniform wall-normal and wall-parallel magnetic fields at low magnetic Reynolds numbers, revealing how Lorentz forces modify coherent structures and turbulent energy budgets through distinct damping and redistribution mechanisms that suppress small-scale turbulence.
This paper presents a two-color laser-induced fluorescence (2C-LIF) technique to simultaneously measure film thickness and scalar concentration during droplet impact on thin liquid films, enabling the quantification of mixing homogeneity and the identification of transport regime transitions across various flow conditions and fluid compositions.
This paper proposes that turbulence is governed by an emergent oscillatory degree of freedom in the Reynolds stress, which unifies universal features like logarithmic velocity profiles and Kolmogorov constants through a geometric, gauge-covariant framework that offers a computationally efficient alternative to direct numerical simulation.
This study utilizes Direct Numerical Simulations to demonstrate that thermodiffusive instabilities in turbulent lean premixed hydrogen-air flames significantly enhance low-frequency combustion noise by altering heat release fluctuations and flame surface dynamics through the coupled action of turbulence and flame stretch, distinguishing their acoustic behavior from stable methane flames.
This paper establishes the mathematical persistence and smoothness of low-order spectral submanifold (SSM) expansions across Hopf bifurcations despite resonance limitations, providing a robust foundation for data-driven model reduction that accurately captures nonlinear fluid dynamics transitions, as demonstrated in lid-driven cavity flow.
This paper presents a computationally efficient spherical multipole expansion of Goldstein's acoustic analogy for predicting propeller tonal noise, which decouples source integrals from observer dependence to enable rapid far-field calculations and is validated through simplified lifting-surface and lifting-line formulations that accurately capture dominant radiation characteristics with substantial computational savings.
Contrary to the prevailing view that no mathematical link exists between the Navier-Stokes equations and the multifractal model, this paper establishes a theoretical reconciliation by deriving a scaling relation that connects Leray's weak solutions to multifractal exponents through velocity gradient norms, thereby identifying a specific range of exponents where thermal noise may induce spontaneous stochasticity.
Through direct numerical simulations of decimated Navier-Stokes dynamics, this study demonstrates that systematically reducing triadic interactions suppresses intermittency and eliminates anomalous dissipation, proving that the full combinatorial richness of these nonlinear interactions is essential for sustaining the singular statistical features of three-dimensional turbulence.
This paper demonstrates through numerical simulation that the complex dynamics and power decay observed in the Fourier spectra of two-dimensional inertial van der Waals flows near Poiseuille and Couette states are primarily driven by density and velocity divergence variables rather than vorticity.
This study validates a flamelet-based Large Eddy Simulation approach for hydrogen-air flames, demonstrating that it effectively captures the coupling between differential diffusion, strain, and curvature to accurately predict flame structure and reaction rates without requiring complex strained flamelet databases.