A Similarity Solution of Rear Stagnation-point Flow over a Flat Plate in Two Dimensions
This paper investigates the development of vortex shedding in two-dimensional unsteady incompressible flow at the rear stagnation point of a flat plate.
🔬 Category
physics.flu-dyn
1255 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.
Emergent universal statistics in nonequilibrium systems with dynamical scale selection
This paper establishes a universal statistical framework for nonequilibrium pattern-forming systems with inherent length-scale selection, demonstrating through theory, simulations, and Faraday wave experiments that their dynamics can be effectively described by monochromatic random fields confined near a mean energy hypersurface.
An Equation of State for Turbulence in the Gross-Pitaevskii model
This paper reports the numerical observation of a universal far-from-equilibrium equation of state in the Gross-Pitaevskii model, demonstrating that in a regime of mixed turbulence, the momentum distribution amplitude scales with the energy flux to the power of approximately 0.67, a finding that extends the concept of quasi-static thermodynamic processes to non-equilibrium steady states.
Fluid flow channeling and mass transport with discontinuous porosity distribution
This paper presents a novel space-time numerical method to model compaction-driven fluid flow in porous rocks with discontinuous porosity, revealing that such discontinuities significantly influence trace element enrichment by creating sharp concentration gradients through the interaction of fluid channels with layered rock structures.
Disentangling discrete and continuous spectra of tidally forced internal waves in shear flow
This study analytically demonstrates that in the presence of shear flow, tidal energy conversion over topography involves both discrete regular eigenmodes and continuous singular solutions, with the latter forming evolving wave packets that can lead to breaking and necessitating an extended formula for net energy conversion.
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.
Irreversibility in scalar active turbulence: The role of topological defects
This paper demonstrates that dynamical irreversibility in scalar active turbulence is primarily driven by singularities in the active stress, where the symmetries of vortical flows around topological defects, particularly specific defect pair configurations, determine the deviation from equilibrium reversible dynamics.
Physics-Based Machine Learning Closures and Wall Models for Hypersonic Transition-Continuum Boundary Layer Predictions
This paper presents a physics-constrained machine learning framework that combines deep learning-based transport models with a skewed-Gaussian wall model to significantly improve the accuracy of continuum solvers in predicting rarefied hypersonic flows where classical Navier-Stokes-Fourier assumptions break down.
Scaling Laws for Caudal Fin Swimmers Incorporating Hydrodynamics, Kinematics, Morphology, and Scale Effects
This study derives and validates physics-based scaling laws for thrust, power, and efficiency in caudal fin swimmers by utilizing high-fidelity simulations and a leading-edge vortex model to analyze the interplay between hydrodynamics, kinematics, morphology, and scale effects.
Are heuristic switches necessary to control dissipation in modern smoothed particle hydrodynamics ?
This paper presents and validates a new SPH shock capture scheme that eliminates the need for heuristic artificial viscosity switches by combining velocity reconstruction with the Balsara correction, thereby achieving improved accuracy and reduced spurious dissipation across diverse flow regimes.