physics.flu-dyn papers | Gist.Science

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.

Morphological Effects on Bacterial Brownian Motion: Validation of a Chiral Two-Body Model

This study validates a computationally efficient chiral two-body model for simulating bacterial Brownian motion, demonstrating that it accurately reproduces experimental behavior across specific morphological ranges and revealing that larger flagellar dimensions enhance trajectory linearity and motion stability while translational and rotational velocities scale linearly with motor rotation rate independent of viscosity.

Baopi Liu, Bowen Jin, Lu Chen, Ning Liu2026-03-03🔬 physics

Aeroelastic Reduced-Order Model Differential Equations in Transonic Buffeting Flow

This paper presents a novel, computationally efficient nonlinear unsteady aerodynamic reduced-order model that integrates oscillator dynamics with Volterra theory to accurately reproduce complex aeroelastic shock buffet phenomena, such as lock-in, in three-dimensional transonic flows.

Michael Candon, Pier Marzocca, Earl H. Dowell2026-03-03🔬 physics

Two-Dimensional Kelvin-Helmholtz Instability with Anisotropic Pressure

This paper presents a comprehensive linear and numerical analysis of the two-dimensional Kelvin-Helmholtz instability in collisionless plasmas with anisotropic pressure, revealing that the magnetohydrodynamic limit yields significantly larger growth rates, current densities, and magnetic island formation compared to the anisotropic CGL regime where energy is diverted into pressure anisotropies.

Shishir Biswas, Masaru Nakanotani, Dinshaw S. Balsara, Vladimir Florinski, Merav Opher2026-03-03🔭 astro-ph

The effect of water on granular liquid flows: from debris to mud flows

This paper establishes a link between the rheology of granular suspensions and velocity field fluctuations to derive effective Navier-Stokes equations for various flow regimes, revealing that while turbulent granular flows exhibit a direct kinetic energy cascade, they follow a scaling law distinct from that of standard Newtonian fluids.

O. Coquand2026-03-03🔬 cond-mat

Wall slip effects on the fiber orientation of a short-fiber suspension in hyperbolic channel flow

This study numerically investigates how increasing wall slip in a hyperbolic channel flow enhances the alignment of short rigid fibers by extending the region of high orientation from the midplane toward the walls, utilizing an analytical velocity field and a second-order tensor formulation with hybrid closure.

Kostas D. Housiadas, Antony N. Beris, Suresh G. Advani2026-03-03🔬 physics

Using surface acoustic waves to drive thin film flow over an obstacle

This paper investigates and models a new paradigm for ultrasonic-driven coating, demonstrating how nanometer-amplitude surface acoustic waves can propel silicone oil films over topographical obstacles through a complex balance of acoustic streaming, capillarity, and gravity.

Yifan Li, Mark Fasano, Avital R. Einhorn, Javier A. Diez, Ofer Manor, Linda J. Cummings, Lou Kondic2026-03-03🔬 physics

Dissipation and microstructure in sheared active suspensions of squirmers

Using active fast Stokesian dynamics simulations, this study reveals that shear flow enhances energy dissipation while reducing relative viscosity in semi-dilute to concentrated suspensions of apolar squirmers, driven by unique microstructural signatures like enhanced nematic order and anisotropic pair correlations that distinguish the behavior of pushers and pullers from passive or purely motile systems.

Zhouyang Ge, Gwynn J. Elfring2026-03-03🔬 cond-mat

Spatial instability analysis and mode transition of a viscoelastic jet in a co-flowing gas stream

This study employs spatial linear instability analysis and energy budget methods to demonstrate that increasing Weber numbers and elasticity in a viscoelastic jet within a co-flowing gas stream drive a transition from axisymmetric to helical modes, revealing a distinct elasticity-enhanced shear-driven instability mechanism validated by experimental flow-focusing results.

Jiawei Li, Ming Wang, Kai Mu, Zhaodong Ding, Ting Si2026-03-03🔬 physics

Control and synchronization of capillary flows in stepped microchannels

This paper experimentally and theoretically demonstrates that introducing geometric steps and lateral offsets in microchannels enables passive, reversible control and synchronization of capillary-driven flows by manipulating the balance between surface tension and Laplace pressure.

Harsha Desu, Niladri S. Satpathi, Lokesh Malik, Ashis K. Sen2026-03-03🔬 physics

Autophoresis of a Janus particle near a planar wall: a lubrication limit

This paper employs asymptotic analysis in the lubrication limit to investigate how the size of a Janus particle's inert region governs its rotational stability and propulsion behavior when moving near a planar wall, overcoming the numerical difficulties associated with resolving steep concentration gradients in the narrow gap.

Tachin Ruangkriengsin, Günther Turk, Howard A. Stone2026-03-03🔬 cond-mat

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