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.

Turbulent mixing of a hydrogen jet in crossflow: direct numerical simulation and model assessment

This study utilizes direct numerical simulation (DNS) to evaluate large eddy simulation (LES) and Reynolds-averaged Navier-Stokes (RANS) models for hydrogen jet mixing in crossflow, revealing that while LES accurately predicts both flow and mixing, RANS significantly under-predicts mixing due to an overestimated turbulent Schmidt number and the invalidity of assuming isotropic turbulent diffusivity.

Yiqing Wang, Chao Xu, Riccardo Scarcelli, Ben Cantrell, Jon Anders, Sameera Wijeyakulasuriya2026-04-24🔬 physics

Meshless $h$ -adaptive Solution for non-Newtonian Natural Convection in a Differentially Heated Cavity

This paper presents a meshless $h$ -adaptive numerical method for simulating non-Newtonian natural convection in a differentially heated cavity, demonstrating that dynamically adjusting node density based on shear-thinning flow characteristics significantly enhances computational efficiency while accurately capturing sharp boundary layer structures.

Miha Rot, Gregor Kosec2026-04-24🔬 physics

Electrokinetic Effects on Flow and Ion Transport in Charge-Patterned Corrugated Nanochannels

This study numerically investigates how surface charge patterns on corrugated nanochannels influence fluid flow and ion transport, revealing two distinct regimes where low driving forces are hindered by streaming potentials while high pressures trigger abrupt velocity transitions that enable selective rectification of ionic currents.

Thomas Petersen, Pouya Golchin, Jinwoo Im, Felipe P. J. de Barros2026-04-23🔬 physics

Maneuvering of an underwater vehicle using bio-inspired pectoral fins

This paper presents a cyber-physical underwater vehicle equipped with bio-inspired pectoral fins that generate controllable forces and moments through flapping synchronization, enabling effective lateral maneuvering, hovering, and station keeping.

Pedro C. Ormonde, Xiaowei He, Kenneth Breuer2026-04-23🔬 physics

The evolution of a gas plume injected into a curved axisymmetric porous channel

This paper investigates gas injection into curved, water-saturated porous channels modeling underground storage, deriving asymptotic evolution equations that reveal how axisymmetry and channel slope drive distinct buoyancy-influenced dynamics and five temporal spreading regimes, ultimately offering insights for enhancing the safety and efficiency of subsurface hydrogen and CO $_2$ storage.

Peter Castellucci, Radha Boya, Lin Ma, Igor L. Chernyavsky, Oliver E. Jensen2026-04-23🔬 physics

Aggregation, breakup, and size-dependent transport in a turbulent channel flow with cohesive particles

This study utilizes direct numerical simulations and a population balance equation framework to reveal that in turbulent channel flows, cohesive aggregates undergo a size-dependent circulation where larger aggregates form in the channel center and migrate to the wall to break, while smaller fragments are transported away to grow, thereby balancing local aggregation and breakup dynamics.

Alexandre D. Leonelli, Lukas Widmer, Eckart Meiburg2026-04-23🔬 physics

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

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physics.flu-dyn