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 study uses numerical simulations to demonstrate that turbine-turbine interactions significantly alter noise levels and amplitude modulation, with downstream alignment causing substantial increases in sound pressure and modulation due to wake-induced flow focusing, while side-by-side and staggered arrangements generally reduce modulation through spatial averaging and rotor dynamics.
This paper introduces a computationally efficient body-free simulation framework that successfully reconstructs three-dimensional turbulent cylinder wakes at various Reynolds numbers by prescribing low-dimensional inflow profiles from the absolutely unstable near-wake region, thereby demonstrating that the essential wake dynamics are governed by near-wake instability rather than the explicit presence of the cylinder.
This paper reviews recent progress on Rayleigh-Bénard thermal convection in emulsions, highlighting how their complex, concentration-dependent rheology couples with buoyancy-driven flows to produce unique stability, transient, and morphological phenomena in soft materials.
Experiments on dense colloidal silica suspensions in rotating microfluidic drums reveal that while thermal agitation causes the smallest particles to exhibit zero angle of repose, larger particles arrest at finite angles that remain below the minimal value for athermal frictionless granular materials, a phenomenon explained by a rheological model linking the arrest to a crossover between glass and jamming transitions driven by the competition between gravitational and thermal pressures.
This paper introduces RAPRAL v1.0, a new C++ radiation solver that combines line-by-line spectral modeling with ray tracing to accurately simulate thermochemical nonequilibrium radiative processes in hypersonic air flows, as validated by its successful prediction of radiative heating in the Fire II flight experiment.
This paper introduces a standardized generalised least squares (GLS) framework that incorporates full error covariance to accurately quantify uncertainties in turbulent boundary layer log-law parameters, offering a predictive tool for experimental design and a new fitting procedure that eliminates the need to prescribe the log region's extent.
This paper introduces a fast spectral formulation of Multiscale Proper Orthogonal Decomposition (mPOD) that replaces time-domain filters with compact spectral masks to decouple frequency bands and reduce computational cost by orders of magnitude while maintaining accuracy in recovering modal structures.
This paper utilizes pseudo-differential operators in conformal variables to analytically derive and numerically validate the criteria and normal forms for four recurrent types of modulational stability bifurcations that occur as the steepness of deep-water Stokes waves increases toward the highest wave limit.
This study employs Direct Numerical Simulation to investigate heat transport in liquid metal duct flows under transverse magnetic fields with varying wall conductivities and buoyancy forces, identifying four distinct flow regimes and evaluating their Nusselt numbers to assess heat transfer capabilities for future fusion reactor blankets.
This study demonstrates that equatorial Kelvin waves in a differentially rotating spherical shell can become unstable under specific conditions of differential rotation and viscosity, suggesting they may play a key role in triggering the episodic mass ejection events observed in Be stars.