Results 71 to 80 of about 909 (221)
A Turbulence Model for Velocity Distribution in Open‐Channel Flows Through Mangrove Trees
Water Resources Research, Volume 61, Issue 8, August 2025.Abstract The vertical distribution of flow velocity plays a critical role in sediment transport and nutrient circulation within mangrove forests, characterized by their intricate root structures. Existing velocity profile models typically rely on a single mixing length scale, limiting their ability to capture the energy distribution of turbulent eddies
Zerun Tang +4 more
wiley +1 more source
Numerical analysis on transitions and symmetry-breaking in the wake of a flapping foil [PDF]
, 2012 Flying and marine animals often use flapping wings or tails to generate thrust. In this paper, we will use the simplest flapping model with a sinusoidal pitching motion over a range of frequency and amplitude to investigate the mechanism of thrust ...
He GY +5 more
core +1 more source
Nondiffracting supertoroidal pulses and optical “Kármán vortex streets”
Nature CommunicationsSupertoroidal light pulses, as space-time nonseparable electromagnetic waves, exhibit unique topological properties including skyrmionic configurations, fractal-like singularities, and energy backflow in free space, which however do not survive upon ...
Yijie Shen +2 more
doaj +1 more source
Methods in Ecology and Evolution, Volume 16, Issue 8, Page 1674-1687, August 2025.Abstract The impact of flow on aquatic organisms (and vice versa) is crucial for many aspects of their physiology and ecology, as this interaction shapes the hydrodynamic boundary layer and thereby the exchange of solutes between the organism and its surrounding environment.
Cesar O. Pacherres +3 more
wiley +1 more source
A: Universality in Vortex Formation. B: Evaluation of Mach Wave Radiation Mechanisms in a Supersonic Jet [PDF]
, 2000 In this thesis two distinct features of coherent structures are investigated. In Part I a model for the pinch-off process in vortex ring formation is developed.
Mohseni, Kamran
core +1 more source
Energies, 2017 Laser Doppler Velocimetry (LDV) measurements, flow visualizations and unsteady Reynolds-Averaged Navier-Stokes (RANS) Computational Fluid Dynamics (CFD) simulations have been carried out to study the turbulent wake that is formed behind a semi-circular ...
S. M. Sayeed-Bin-Asad +2 more
doaj +1 more source
Energy Science &Engineering, Volume 13, Issue 7, Page 3588-3604, July 2025.ABSTRACT Pressure pulsation is a key factor affecting the safe and stable operation of pump‐turbines. This article is based on same frequency‐tracking method on the pressure pulsation propagation characteristics of pump‐turbine during generation mode. The numerical simulation is validated by experimental study on a model pump‐turbine.
Yanpin Li +9 more
wiley +1 more source
On the Spacing of Karman Vortices
, 1969 Equations for the absolute dimensions of the Karman vortex street are developed in terms of the coefficient of drag and the Strouhal number of the vortex shedding bluff body.
D. W. Sallet
core +1 more source
Wonders of Harbor and Grey Seal Whiskers: Morphology, Natural Frequencies, and 3D Modeling
Advanced Science, Volume 12, Issue 23, June 20, 2025.Seals detect prey by sensing vortices using whiskers. How whisker morphologies and locations respond to hydrodynamic signals across various frequencies remains unclear. This study measures whiskers’ natural frequencies and morphologies and maps them to whisker locations on the muzzle, providing insights into how seals interpret hydrodynamic signals ...
Xingwen Zheng +4 more
wiley +1 more source
Characterization of von Karman street with seal whisker-like sensor
, 2012 Harbor seals are known to track the hydrodynamic trails of their prey with only their whiskers. The geometry of their whiskers has been found to reduce vortex induced vibration (VIV). In this study, we develop an artificial whiskerlike sensor to evaluate
Triantafyllou, Michael S. +5 more
core +1 more source