967 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.
This study experimentally demonstrates that passive transverse forcing of turbulent boundary-layer flow using sinusoidal surface grooves generates a converging-diverging flow pattern known as a Passive Stokes Layer, which offers limited frictional drag reduction potential that is likely negated by pressure drag and other losses.
This paper proposes a variable-coefficient model for the - turbulence framework that accounts for finite cascade time and Reynolds number effects, thereby accurately capturing the decay and growth of isotropic turbulence across diverse flow scenarios.
This paper introduces a generalized Lagrangian mean framework to separate wave and mean-flow contributions to surface kinetic energy using drifter data, revealing that mean flows dominate rotational energy at scales larger than 1 km while divergent and rotational components are equipartitioned at smaller scales, with winter exhibiting more active mean flows and enhanced downscale wave energy transfer compared to summer.
This study presents a hybrid framework that integrates 4D-flow MRI measurements with physics-informed neural network-based data assimilation and linear stability analysis to reconstruct mean flow fields and characterize the linear amplification mechanisms governing turbulent dynamics in a stenotic flow.
This study employs the squirmer model and dissipative particle dynamics to investigate how swimmer shape, volume fraction, hydrodynamic interactions, and rotlet dipoles influence the collective behaviors—ranging from gas-like phases to swarming and motility-induced phase separation—of bacteria in confined thin films, revealing asymmetric structural formation and the mitigating effect of rotlet dipoles on differences between swimmer types.
This paper introduces an iterative method to analytically calculate arbitrary moments of the spectral measure for advection-diffusion in periodic flow fields, enabling the derivation of rigorous, high-order bounds on effective transport that accurately capture known behaviors in 2D steady flows and extend to 3D and time-periodic regimes.
This paper presents a continuum model of schooling swimmers interacting through temporally nonlocal hydrodynamic forces, demonstrating that such interactions can destabilize uniform schools into stable, coarsening traveling waves of dense sub-schools.
This study utilizes Lattice-Boltzmann Very-Large-Eddy simulations to demonstrate that the spatial development of turbulent grazing flow over an acoustic liner significantly alters boundary layer dynamics and orifice flow behavior, leading to position-dependent acoustic energy dissipation and discrepancies in impedance measurements that current methods fail to fully capture.
This study utilizes hot-wire anemometry to demonstrate that turbulent boundary layers subjected to spatially localized pressure gradient histories retain persistent outer-layer turbulence imprints and delayed structural reorganization even after the mean flow and inner-region statistics have recovered to zero-pressure-gradient conditions.
This paper introduces a novel, highly efficient class of Lattice Boltzmann Methods for simulating complex compressible and incompressible magnetohydrodynamic flows, demonstrating near-peak hardware performance and successfully modeling dynamic fluid-structure interactions in a magnetized asteroid scenario.