🔬 Category

physics.flu-dyn

1169 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.

Stabilisation of second Mack mode in hypersonic boundary layers through spanwise non-uniform surface temperature distribution

This study demonstrates through direct numerical simulations that spanwise non-uniform surface temperature distributions can effectively stabilize hypersonic boundary layers by generating steady streaks that reduce second Mack mode instability energy by up to 60%, with optimal suppression achieved at spanwise wavelengths of 8 to 10 times the local boundary layer thickness.

L. Boscagli, G. Rigas, O. Marxen, P. J. K. Bruce2026-04-20🔬 physics

Large-eddy simulation of the FDA benchmark blood pump: validation against experiments and implications for turbulent flow mechanisms

This study validates that large-eddy simulations with transient sliding-interface coupling outperform Reynolds-averaged Navier-Stokes methods in predicting the complex, unsteady turbulent flow within the FDA benchmark blood pump, thereby establishing a high-fidelity framework for future hemodynamic and hemocompatibility research.

Xuanming Huang, Chi Ding, Yujie Sun, Shidi Huang, Andrea Cioncolini, Damiano Padovani, Ju Liu2026-04-20🔬 physics

Towards PR-DNS of scour around a wall-mounted cylinder in turbulent open channel flow

This study utilizes particle-resolved direct numerical simulation to demonstrate that a wall-mounted cylinder in turbulent open channel flow generates intense vortical structures and enhanced turbulence that significantly alter local wall shear stress, leading to preferential particle accumulation or depletion in the wake and increased wall-normal transport, effects that are further amplified by the addition of wall roughness.

Leo Bürk, Artjom Hermann, Markus Weyrauch, Markus Uhlmann2026-04-20🔬 physics

Implicit Velocity Correction Schemes for Scale-Resolving Simulations of Incompressible Flow: Stability, Accuracy, and Performance

This study demonstrates that implicit velocity correction schemes, specifically linear-implicit and sub-stepping methods, significantly enhance the stability and reduce the overall time-to-solution of scale-resolving simulations for complex high Reynolds number flows by up to a factor of eleven, while maintaining high accuracy even with time steps twenty times larger than explicit limits.

Henrik Wüstenberg, Alexandra Liosi, Spencer J. Sherwin, Joaquim Peiró, David Moxey2026-04-20🔬 physics

Quantum-Inspired Simulation of 2D Turbulent Rayleigh-Bénard Convection

This paper demonstrates that Matrix Product State (MPS) methods can efficiently simulate 2D turbulent Rayleigh-Bénard convection up to Rayleigh numbers of 101010^{10}, achieving accurate statistical observables with significantly fewer degrees of freedom than traditional methods and suggesting scalability for investigating the ultimate regime of turbulence.

Nis-Luca van Hülst, Mario Guillaume Cecile, Hai-Yen Van, Tomohiro Hashizume, Eugene de Villiers, Dieter Jaksch2026-04-20🔬 physics

Immersion freezing in particle-based aerosol-cloud microphysics: a probabilistic perspective on singular and time-dependent models

This paper evaluates singular and time-dependent parameterizations for immersion freezing within probabilistic particle-based aerosol-cloud microphysics models, demonstrating that while the singular approach is limited to specific cooling rates, the time-dependent method offers a more robust framework for simulating heterogeneous ice nucleation under realistic atmospheric flow conditions.

Sylwester Arabas, Jeffrey H. Curtis, Israel Silber, Ann M. Fridlind, Daniel A. Knopf, Matthew West, Nicole Riemer2026-04-17🔬 physics

Two-component inner--outer scaling model for the wall-pressure spectrum at high Reynolds number

This paper proposes two new semi-empirical models for the wall-pressure spectrum in high-Reynolds-number turbulent flows that overcome the limitations of conventional models by combining inner- and outer-scaled spectral components to accurately capture low-frequency growth and variance across a wide range of friction Reynolds numbers.

Jonathan M. O. Massey, Alexander J. Smits, Beverley J. McKeon2026-04-17🔬 physics

Lagrangian description and quantification of scalar mixing in fluid flows from particle tracks

This paper presents a novel data-driven framework that combines diffusion maps with deterministic particle methods to describe and quantify scalar mixing in fluid flows directly from tracer trajectories, addressing a gap in existing Lagrangian approaches that focus primarily on detecting coherent structures rather than quantifying mixing.

Anna Klünker, Alexandra von Kameke, Kathrin Padberg-Gehle2026-04-17🔬 physics