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.

Wave-Appropriate Reconstruction of Compressible Multiphase and Multicomponent Flows: Fully Conservative and Semi-Conservative Eigenstructures

This paper derives the complete eigenstructures for both fully conservative and semi-conservative formulations of the Allaire five-equation model, demonstrating that characteristic-space reconstruction is essential for eliminating spurious pressure oscillations at material interfaces while revealing that shear waves are decoupled from thermodynamic and interface fields in compressible multiphase flows.

Amareshwara Sainadh Chamarthi2026-04-23🔬 physics

AI models of unstable flow exhibit hallucination

This paper identifies and explains the phenomenon of "hallucination" in AI models simulating unstable fluid flows, where spectral bias leads to physically implausible solutions, and proposes the DeepFingers framework to overcome these limitations by enforcing balanced learning across spatial modes.

Ramdhan Wibawa, Birendra Jha2026-04-23🌀 nlin

Emergence of Transport Regimes from the Axial Field-Induced Interfacial Gradients in Uniform Surface Potential Nanopores

This study reveals that an axial electric field interacting with a uniform surface potential in nanopores generates a non-uniform electric double layer that mimics a zeta potential gradient, thereby breaking translational symmetry to drive ion selectivity, current rectification, and complex electroosmotic flows governed by a single asymmetry parameter.

Pramodt Srinivasula, Doyel Pandey2026-04-23🔬 physics

Nonisothermal global-pressure exactness in fractured multiphase flow with evolving fracture aperture

This paper derives exactness criteria for nonisothermal global-pressure formulations in fractured multiphase flow with evolving apertures, demonstrating how thermal forcing and aperture evolution influence the equivalence to phase-pressure systems and providing a conservative least-squares surrogate when exactness fails.

Christian Tantardini, Fernando Alonso-Marroquin2026-04-23🔬 physics

Subharmonic instability of large-scale wavy structures in two-dimensional channels

This study employs direct numerical simulations and Floquet-based secondary instability analysis to demonstrate that while large-scale wavy structures in two-dimensional channels remain stable at $Re=3000$, they undergo a subharmonic torsional instability at $Re=200000$ that deforms and splits the waves, offering a novel mechanism for turbulence generation in high-Reynolds-number two-dimensional flows.

An-Xiao Han, Peng-Yu Duan, Ming-Ze Ma, Xi Chen2026-04-23🔬 physics

Polytropic stellar wind models with strongly localized heating

This paper generalizes polyropic stellar wind models to include more realistic non-adiabatic behavior under strongly localized heating, demonstrating that the required energy is plausible and offering potential explanations for variable wind streams and acoustic waves observed by the Parker Solar Probe.

L. Westrich (Theoretical Physics IV, Ruhr-Universität Bochum, Bochum, Germany, Centre for Computational Helio Studies, Faculty of Natural Sciences and Medicine, Ilia State University, Tbilisi, Georg (…)2026-04-23🔭 astro-ph

Flow-history-dependent orientational relaxation in dilute polydisperse colloidal rod suspensions

This study demonstrates that in dilute polydisperse colloidal rod suspensions, the orientation relaxation time following flow cessation is not a fixed material constant but is flow-history-dependent, systematically decreasing with higher pre-shear rates as the dominant relaxing sub-population shifts from longer to shorter rods.

Yuto Yokoyama, Vincenzo Calabrese, Fabian Hillebrand, Henry J. London, Simon J. Haward, Amy Q. Shen2026-04-23🔬 cond-mat

RG-Based Local Hopf Reduction and Slow-Manifold Reconstruction for Nonlinear Aeroelastic Systems

This paper introduces a renormalization-group-based reduction method that efficiently derives explicit Hopf amplitude equations and slow-manifold approximations for nonlinear aeroelastic systems, offering a compact and parameter-aware framework for constructing local reduced-order models near flutter.

Gelin Chen, Chen Song, Chao Yang2026-04-23⚡ eess

Turbulence closure in the light of phase transition

This paper derives new turbulence closure equations by modeling turbulence as a continuous phase transition, treating turbulent viscosity as a tensor to solve Reynolds averaged Navier-Stokes equations for a plane jet, and demonstrates that the resulting agreement with existing literature and the observed symmetries in turbulent stresses validate the effectiveness of this approach.

Mohammed A. Azim2026-04-22🔬 physics

Derivation and well-posedness for asymptotic models of cold plasmas

This paper derives three new asymptotic models for collision-free plasmas in magnetic fields, establishes their well-posedness in Sobolev spaces, and demonstrates the existence of wave-breaking solutions for a unidirectional model related to the Fornberg-Whitham equation.

Diego Alonso-Orán, Ángel Durán, Rafael Granero-Belinchón2026-04-22🔢 math-ph

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