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 paper investigates the self-diffusiophoretic motion of a catalytic sphere confined in a wedge-shaped domain by solving the concentration field via the Fourier-Kontorovich-Lebedev transform and method of images, revealing how wedge geometry and phoretic interactions significantly influence the particle's velocity without considering hydrodynamic effects.
This paper utilizes the Parabolised Coherent Structures (PCS) method to accurately predict the finite-amplitude evolution of Görtler vortices and their transition to turbulence, successfully reproducing experimental observations from Swearingen & Blackwelder (1987) by incorporating nonlinear vortex-wave interactions into a spatial-marching framework.
This paper identifies coherent wave interference between nearly degenerate magnetorotational instability eigenfrequencies as the physical origin of long-period cyclic magnetic field reversals in accretion disks, a mechanism validated by both weakly nonlinear theory and numerical simulations.
This paper establishes that the direction of energy and enstrophy cascades in two-dimensional turbulence is determined by the complex phases of the Fourier-transformed velocity field, introducing a parameter-free stochastic model based on triad phase dynamics that successfully predicts these cascades using only the energy spectrum.
This paper reveals that squids achieve superpropulsion by using a compliant, collagen-reinforced siphon that acts as an elastic capacitor to store and return energy, thereby amplifying jet impulse by over 300% through impedance matching, a mechanism that can be replicated in engineered soft robotic thrusters to significantly enhance performance across scales.
This study investigates the instability of Stokes layers in shear-thinning Carreau fluids, revealing that stronger shear-thinning monotonically stabilizes the flow while the fluid's response time has a non-monotonic effect, with instability driven by the phase alignment between perturbations and the oscillatory base flow that enables efficient energy extraction.
This study combines numerical simulations and experiments to demonstrate that soluble surfactants with fast sorption kinetics, such as Surfynol 465 and SDS, maintain nearly constant surface tension during most of a pendant droplet's breakup by overcoming diffusion barriers through convection, whereas slow-kinetics surfactants like Triton X-100 significantly alter the pinch-off dynamics by shortening the bridging filament due to adsorption energy barriers.
This paper experimentally demonstrates through oscillating grid turbulence that inertial particles accumulate in regions of lower turbulence intensity due to turbophoresis, a phenomenon where particle migration is driven by the gradient of turbulence intensity.
This paper computes the Strouhal number for supernova-driven turbulence in Milky Way-like and starburst disk simulations, finding median values around 0.25–0.26 which indicates that the standard assumption of St=1 applies only locally near the supernova remnant's cooling radius rather than at the global outer scale.
High-resolution large-eddy simulations reveal that while passive scalar mixing in stratified homogeneous turbulence behaves similarly to unstratified cases in the transverse direction, stratification severely inhibits vertical mixing by suppressing large-scale stirring, leading to distinct growth limits and fluctuation intensities that inform specific modeling approaches for scalar flux.