995 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 while unconstrained and symmetry-preserving data-driven neural networks both outperform classical large-eddy simulation closures in accuracy, enforcing physical symmetries is crucial for generating more physically consistent velocity-gradient statistics and improving the overall quality of the learned closure.
Using particle tracking velocimetry with frozen deuterium tracers, this study presents evidence of anomalously long-lived vortex rings with multiquantum circulation in superfluid helium-4, challenging the standard paradigm that such vortices rapidly split into singly quantized filaments.
This study explains the emergence of nearly constant mean angular momentum profiles in high-Reynolds-number Taylor–Couette turbulence by demonstrating that incorporating the history effects of Reynolds stress, specifically through the convection term modeled via the Jaumann derivative, is essential for accurately predicting these profiles in the featureless ultimate regime.
This paper presents experimental evidence and a supporting theoretical model demonstrating that the interaction between surface waves and ambient sub-surface turbulence generates a near-surface Eulerian-mean flow that opposes and partially cancels the Stokes drift, thereby significantly altering the vertical redistribution of momentum and the transport of water-borne materials in the ocean.
This paper demonstrates that arbitrarily small odd-parity perturbations fundamentally alter the topology of zero-helicity vortices and field-reversed configurations by transforming their interior flux surfaces from toroidal to simply connected, thereby necessitating a revision of established models in both fusion confinement physics and fluid dynamics.
This paper presents a method to fabricate tunable, centimetric elastic capsules that function as macroscopic "elasto-drops" with adjustable effective surface tension, demonstrating that their dynamics are governed primarily by hoop stress rather than bending stiffness.
This paper introduces a novel, low-cost, data-driven framework using Vector Quantization Principal Component Analysis (VQPCA) to identify structural sensitivity zones and dominant flow patterns in fluid dynamics, successfully validating the method on cylinder wakes and synthetic jets to enable effective flow control strategies without relying on adjoint methods.
This study utilizes validated Large-eddy simulations to investigate how shock waves interact with abrupt and smooth constrictions in conduits, revealing distinct dependencies on blockage ratio and constriction length that lead to the development of semi-empirical models for predicting reflected and transmitted shock strengths.
This study utilizes high-fidelity direct numerical simulations to demonstrate that increasing inlet Mach numbers in a low-pressure turbine cascade systematically reduces separation bubble sizes and accelerates transition to turbulence, yet paradoxically increases profile losses by altering the transition pathway from spanwise rolls to streak-dominated bypass mechanisms.
This paper presents a robust compressible APIC/FLIP method that combines conservative split resampling and adaptive APIC/PIC blending to eliminate particle depletion artifacts in long-time Richtmyer-Meshkov instability simulations while preserving vortex dynamics and matching reference Euler growth metrics.