physics.flu-dyn papers | Gist.Science

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.

Spectral analysis of attached and separated turbulent flows over a Gaussian-shaped bump

This study combines experimental measurements with linear modeling to reveal that low-frequency coherent structures in separated turbulent flow over a Gaussian bump are driven by a three-dimensional zero-frequency modal instability and finite-span standing-wave dynamics, offering a physical explanation for discrepancies between simulations and experiments while highlighting the critical need for adequate spanwise domain sizes in numerical studies.

Roman Klopsch, Lukas M. Fuchs, Georgios Rigas, Kilian Oberleithner, Jakob G. R. von Saldern2026-03-09🔬 physics

Investigation of Aeroacoustics and In-flight Particle Transport in Thermal Spray Supersonic Jets

This study develops and validates a combined analytical and numerical framework linking thermal spray nozzle operating conditions to far-field aeroacoustic signatures and in-flight particle transport, demonstrating that acoustic monitoring can serve as a non-intrusive method for controlling and optimizing the thermal spray process.

D. Rahmat Samii, M. Tembely2026-03-09🔬 physics

Black hole analogues in two-dimensional flows with constant shear

This paper reviews the analogue gravity description of unidirectional water waves in two-dimensional flows with constant shear, demonstrating that such flows can be effectively modeled by a curved spacetime metric without requiring prior knowledge of general relativity.

Alessia Biondi, Scott Robertson, Germain Rousseaux2026-03-09🔬 physics

On Free Moving Micron-Sized Droplet-Particle Collisions

This study investigates mid-air collisions between free micron-sized droplets and particles to reveal how particle density and wettability govern capture outcomes, leading to a modified effective Weber number that successfully unifies collision regime boundaries across varying size ratios and Ohnesorge numbers.

Tushar Srivastava, Karrar H. Al-Dirawi, Benjamin Lobel, Andrew E. Bayly2026-03-09🔬 physics

Holey sheets: Double-Threshold Rupture of Draining Liquid Films

This study reveals that the rupture of micron-thick liquid films is governed by a deterministic double-threshold mechanism requiring both sufficient outward driving force and cavity distortion, which explains why these films perforate despite molecular forces being negligible at that scale.

Ayush K. Dixit, Chunheng Zhao, Stéphane Zaleski, Detlef Lohse, Vatsal Sanjay2026-03-06🔬 physics

Temperature transformation recovering the compressible law of the wall for turbulent channel flow

This paper proposes new Van Driest-type and semi-local-type temperature transformations for compressible turbulent channel flow, derived from momentum and energy balance analyses, which successfully recover the incompressible law of the wall with high accuracy by accounting for mixing length effects, body force work, and turbulent kinetic energy flux.

Youjie Xu, Steffen J. Schmidt, Nikolaus A. Adams2026-03-06🔬 physics

Uncertainty-Aware Flow Field Reconstruction Using SVGP Kolmogorov-Arnold Networks

This paper introduces an SVGP-KAN framework that reconstructs time-resolved flow fields from sparse velocimetry data with accuracy comparable to classical methods while providing well-calibrated epistemic uncertainty estimates to guide experimental design.

Y. Sungtaek Ju2026-03-06🔬 physics

Spatial symmetry invariance of solution of Kolmogorov flow

This paper presents a mathematical proof demonstrating that the spatial symmetry of two-dimensional Kolmogorov flow solutions is preserved for all time, thereby validating clean numerical simulation (CNS) results while exposing the rapid symmetry-breaking artifacts caused by numerical noise in direct numerical simulation (DNS).

Shijun Liao2026-03-06✓ Author reviewed ⓘ🔬 physics

Lagrangian dispersion in experimental stratified turbulence

This paper presents large-scale experimental findings on Lagrangian tracer dispersion in stratified turbulence, revealing that vertical motion is constrained by the ratio of velocity fluctuation to buoyancy frequency, while velocity spectra exhibit a distinct $1/f^3$ decay and a transition from Gaussian to non-Gaussian statistics as the flow shifts from wave-dominated to fully nonlinear turbulent regimes.

Maelys Magnier, Costanza Rodda, Clément Savaro, Pierre Augier, Nathanael Machicoane, Thomas Valran, Samuel Viboud, Nicolas Mordant2026-03-06🔬 physics

Comparison of data-driven symmetry-preserving closure models for large-eddy simulation

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.

Syver Døving Agdestein, Benjamin Sanderse2026-03-06🔬 physics

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