1214 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 analyzes the roll instability of fish-like underwater robots by modeling them as a hydrodynamic Chaplygin sleigh, demonstrating that their periodic yaw motion induces parametric roll excitation described by a nonhomogeneous Mathieu equation, which reveals a fundamental trade-off between swimming speed and roll stability.
This study numerically investigates turbulent, compressible methane diffusion flames in vitiated air using a proposed compressible flamelet progress variable model, revealing that detailed reaction mechanisms significantly alter combustion characteristics and that vitiated air conditions often lead to unstable, weak flames prone to quenching.
This paper proposes using the turbulence kinetic energy dissipation rate () as a closure variable to link resolved-scale RANS or LES computations with sub-grid non-premixed flamelet models, demonstrating that incorporating vorticity effects derived from significantly enhances the accuracy of predicting flame temperature, burning rates, and scalar dissipation in turbulent combustion.
This study evaluates two scale-dependent energy definitions in buoyancy-driven bubbly flows and concludes that the Favre filtered approach is physically superior because it correctly captures buoyancy as an energy source, pressure as a large-scale energy transfer mechanism, and advective nonlinearity and surface tension as downscale energy transfer mechanisms leading to viscous dissipation.
This paper numerically and theoretically investigates how proximity-induced shielding and Marangoni forces affect the internal flow symmetry and concentration profiles of evaporating binary droplets and rivulets, revealing that while asymmetry generally diminishes over time, the influence of surface tension gradients on flow stagnation differs between two-dimensional rivulets and three-dimensional droplets due to the latter's additional azimuthal flow.
This paper analytically proves the existence of internal wave Whispering Gallery Modes (WGMs) in channels using continuous symmetries, identifies a new along-channel critical-slope wave attractor that positions WGMs at the boundary between attraction basins, and applies these findings to explain energy fluxes in submarine canyons and tidal intensification near critical slopes.
This paper demonstrates that in magnetized stellar cores, nonaxisymmetric internal gravity waves convert into slow-magnetosonic waves that resonate with Alfvén waves and undergo rapid damping via phase mixing, thereby providing a mechanism for the suppression of global oscillation modes observed in stars.
This paper presents a multidimensional, vertically integrated modeling framework that incorporates phase change to simulate the formation and expansion of aquifers within cold firn, revealing how lower initial temperatures impede lateral propagation through porosity reduction and freezing, thereby offering new insights into subsurface meltwater storage's role in sea-level rise.
This paper proposes a space-dependent eddy thermal diffusivity model to derive analytical mean temperature profiles for turbulent vertical natural convection, revealing universal scaling functions in inner and outer regions that align well with direct numerical simulation data.
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.