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.

Conservation of magnetic-helicity fluctuations due to spatial decorrelation of fluxes in decaying MHD turbulence

This paper develops a theoretical framework to explain the conservation of magnetic-helicity fluctuations in decaying MHD turbulence by analyzing boundary terms associated with long-range spatial correlations, finding that such correlations are dynamically suppressed in local and most non-local gauges (including Coulomb) but can arise in specific non-local gauges, a result verified by high-resolution numerical simulations.

Justin Kin Jun Hew, David N. Hosking, Christoph Federrath, James R. Beattie, Neco Kriel2026-04-01🔭 astro-ph

Controlled particle displacement by hydrodynamic obstacle interaction in non-inertial flows

This paper demonstrates that net deflection and size-based separation of force-free microparticles in non-inertial Stokes flows can be achieved solely through hydrodynamic interactions with asymmetric obstacles, providing a rigorous framework for microfluidic manipulation without relying on contact forces.

Partha Kumar Das, Xuchen Liu, Sascha Hilgenfeldt2026-04-01🔬 physics

Performance of Flamelet Models with Epsilon Tracking for Diffusion Flame Simulations

This paper proposes a new compressible flamelet formulation that uses the turbulent kinetic energy dissipation rate ( $\epsilon$ ) as a tracking variable to correct the physical inconsistencies of the conventional Flamelet Progress Variable (FPV) model, thereby restoring the coupling between resolved-scale and subgrid strain rates for more accurate diffusion flame simulations.

Sylvain L. Walsh, Yalu Zhu, Feng Liu, William A. Sirignano2026-04-01🔬 physics

Flamelet Model with Epsilon Tracking in a Turbine Stator

This study numerically investigates JP-5 combustion in a turbine stator using a Reynolds-Averaged Navier-Stokes framework coupled with a novel epsilon-based flamelet model, revealing that the detailed chemistry approach predicts lower peak temperatures and distinct reaction zone characteristics compared to simpler one-step kinetics models.

Sylvain L. Walsh, Yalu Zhu, Feng Liu, William A. Sirignano2026-04-01🔬 physics

Integrated vortex-assisted electroporation platform with enhanced throughput for genetic delivery to primary cells

This paper presents an integrated vortex-assisted electroporation platform that overcomes the limitations of conventional bulk systems by combining size-selective cell trapping with optimized electrical and buffer conditions to achieve high-throughput, uniform genetic delivery of plasmid DNA and mRNA into heterogeneous primary human cells.

Hyun Woo Sung, Soojung Claire Hur2026-04-01🔬 physics.app-ph

Effect of directionality on extreme wave formation during nonlinear shoaling

This experimental study reveals that while directional spreading has a minor effect on depth-induced non-equilibrium extreme wave formation, the wave incidence direction significantly influences the phenomenon by altering the effective bottom slope.

Jie Zhang, Yuxiang Ma, Jiawen Sun, Limin Huang, Michel Benoit, Saulo Mendes2026-04-01🔬 physics

Turbulent spots in hypersonic transitional planar and axisymmetric boundary layers

This study experimentally characterizes turbulent spots in hypersonic transitional boundary layers over flat plates and axisymmetric cones at Mach 5.85, revealing that while spot leading edges convect at 90% of the freestream speed for both geometries, planar spots exhibit slower trailing edges, faster streamwise growth, and generation rates between 1 and 3 million spots per meter per second compared to their axisymmetric counterparts.

Ankit Bajpai, Jagadeesh Gopalan2026-04-01🔬 physics

Learning 3D Hypersonic Flow with Physics-Enhanced Neural Fields: A Case Study on the Orion Reentry Capsule

This paper proposes a physics-enhanced 3D neural field framework that outperforms traditional surrogate models in efficiently and accurately predicting steady hypersonic flow around the Orion reentry capsule by capturing sharp discontinuities and enforcing physical boundary conditions.

Haitz Sáez de Ocáriz Borde, Pietro Innocenzi, Flavio Savarino, Andrei Cristian Popescu, Pantelis Papageorgiou2026-04-01🔬 physics

Large-Eddy Simulation of Reacting Flow in a Turbine Stage

This study employs large-eddy simulations to demonstrate the viability of a turbine-burner concept, revealing that while fuel injection and combustion significantly increase work extraction and thermal efficiency with minimal impact on total-pressure loss, a more uniform spanwise distribution of injectors is effective in suppressing local high temperatures on rotor blades.

Yalu Zhu, Feng Liu, William A. Sirignano2026-04-01🔬 physics

Sparse Müntz--Szász Recovery for Boundary-Anchored Velocity Profiles: A Short-Record Roughness Diagnostic in Turbulence

This paper introduces a sparse convex-relaxation framework using a Müntz–Szász/Jacobi dictionary to estimate effective local scaling exponents from short, boundary-anchored velocity profiles, demonstrating its utility as a finite-scale geometric diagnostic that reveals directional anisotropy and vorticity-aligned roughness structures in turbulent flows without requiring external calibration.

D Yang Eng2026-04-01🌀 nlin

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