1274 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 paper presents an adjoint-based optimization framework combined with Hamiltonian Monte Carlo to reconstruct the forcing of finite-size passive particles in turbulent flows from sparse, noisy trajectory data, demonstrating accurate results specifically for particle Reynolds numbers between 1 and 5.
This paper presents a novel Green's Function Integral (GFI) method that reconstructs pressure fields from error-embedded pressure gradient data by utilizing the Green's function of the Laplacian operator, offering a mathematically equivalent yet computationally more efficient and geometrically flexible alternative to the state-of-the-art omnidirectional integration (ODI) approach.
This study demonstrates that applying a steady spanwise Stokes layer to Poiseuille flow significantly enhances linear stability and reduces transient energy growth, suggesting a promising strategy for simultaneously delaying turbulence transition and lowering skin-friction drag.
This paper introduces a novel adaptive mesh refinement framework that utilizes three independent, error-optimized meshes for the base flow, direct, and adjoint solutions to enhance the accuracy of global stability analysis for transitional incompressible flows, as validated by the two-dimensional flow past a circular cylinder.
This paper demonstrates that the stability of columnar vortices is protected by hydrodynamic selection rules that forbid intrinsic triadic resonance, revealing that vortex breakdown can only occur through specific symmetry-breaking mechanisms such as external parametric forcing or active critical layers that enable energy extraction from the mean flow.
This paper demonstrates that the HydroPol2D model, utilizing 2D local-inertial approximations, offers a computationally efficient alternative (23 times faster) to full-momentum solvers for urban and dam-break flood forecasting, achieving high accuracy in subcritical flows and peak depth predictions while highlighting the critical need to account for urban infrastructure to avoid significant discharge errors.
This paper presents a high-order kinetic scheme with flexible velocities that ensures positivity preservation for multi-component Euler equations and achieves exact capture of stationary contact discontinuities, validated through various 1D and 2D benchmark test cases.
This paper introduces characteristic boundary conditions, including Navier-Stokes characteristic boundary conditions and a novel generalized characteristic relaxation approach, within the Hybridizable Discontinuous Galerkin framework to effectively minimize wave and vortex reflections at artificial boundaries in both inviscid and viscous weakly compressible flows.
This study analyzes the boundary-velocity error and numerical stability of the accelerated multi-direct-forcing immersed boundary method to identify a critical parameter governing stability and an optimal acceleration parameter that minimizes velocity errors independently of boundary details, thereby providing guidelines for stable and accurate moving boundary simulations.
This paper reports the first experimental verification of the Josephson-Anderson relation in classical hydrodynamics, demonstrating excellent agreement between the predicted vorticity-flux-based drag force and measurements taken from a flat plate accelerated through water.