989 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 utilizes CFD simulations with wall-modeled large eddy simulation to demonstrate that an impeller-driven intra-aortic pump outperforms single and triplet pump designs by achieving superior pressure head, hydraulic efficiency, and hemocompatibility, as evidenced by lower NIH values and a Hemolytic Number consistently below 1.
This paper demonstrates that reconfigurable kirigami sheets can reversibly transform into 3D porous meso-architectures under flow to actively modulate and partially decouple lift and drag forces, with their aerodynamic behavior governed by structural stiffness and the Cauchy number.
This study investigates the vertical penetration dynamics of rigid rods, flexible rods, and granular jets into a 2D low-density granular bed, revealing that all three projectile types deviate from their initial vertical alignment due to bed inhomogeneities and torque, eventually settling into a horizontal configuration, with flexible rods buckling and granular jets penetrating significantly less than their rigid counterparts.
This study utilizes a phase-field model to demonstrate that shear-induced surfactant reorientation dynamically increases effective surface tension, thereby providing a microscopic mechanism that significantly influences droplet deformation in both weakly and strongly confined shear flows.
This paper derives universal closed-form scaling laws for shear-induced self-diffusivity in dilute non-Brownian suspensions, demonstrating that weak central repulsive forces break hydrodynamic fore-aft symmetry to generate irreversible transverse displacements, with the gradient component exhibiting a logarithmic enhancement over the vorticity component regardless of the specific repulsive mechanism.
This paper presents a computationally efficient numerical framework that combines a two-fluid model with slender-body theory to simulate the locomotion of flagellated bacteria in complex, porous bio-fluids by decomposing the flow into additive kinematic, forcing, and polymer stress components.
This paper derives and analyzes reduced bidirectional and unidirectional weakly nonlinear models for hydroelastic water waves coupled to a nonlinear viscoelastic plate, establishing local and global well-posedness results for these new nonlocal evolution equations.
By combining large-scale lattice Boltzmann simulations with an analytical model, this study reveals that fractal trees in urban environments undergo a drag-crisis transition at high Reynolds numbers that is smoothed by structural complexity and shifted to lower speeds by atmospheric turbulence, challenging the assumption that pruning always reduces aerodynamic loading.
This study presents the first direct high-speed optical observations of individual particle motion within a natural powder snow avalanche, revealing distinct flow phases, quantifying turbulence and shear instabilities, and providing critical empirical data to refine numerical models of multiphase gravity currents.
This study combines experiments, theory, and simulations to demonstrate that while inertia does not fundamentally alter the flow configuration near a moving contact line, it induces systematic deviations in streamfunction contours and interfacial speed profiles that existing inertial theories fail to fully capture at higher Reynolds numbers, highlighting the need for more sophisticated models.