Results 11 to 20 of about 138,186 (293)

Experimental investigation of the effects of the turbulence on the impact force of flash flood

open access: yesFrontiers in Earth Science, 2023
Flash floods cause damage to engineering structures and buildings mainly due to their huge impact force. Scientific investigation of the impact process of flash floods has significant theoretical and engineering implications in ensuring the safety of ...
Haihua Gu, Yu Lei, Yu Lei
doaj   +1 more source

Direct Numerical Simulation of Active-Controlled Impinging Jets

open access: yesJournal of Fluid Science and Technology, 2009
In order to improve the heat transfer on the wall, impinging jets are used in various industrial applications, and have been investigated experimentally and numerically so far.
Koichi TSUJIMOTO   +3 more
doaj   +1 more source

PIV Measurement and Proper Orthogonal Decomposition Analysis of Annular Gap Flow of a Hydraulic Machine

open access: yesMachines, 2022
The fluid stress or flow-induced vibration of annular gap flow always has some influence on the stable working conditions of a hydraulic machine. A time-averaged analysis of flow may not have to explicitly acknowledge these factors. Accordingly, a finite-
Yiming Zhao, Yongye Li, Xiaoteng Song
doaj   +1 more source

Analysis of Near-wall Coherent Structure of Spiral Flow in Circular Pipe Based on Large Eddy Simulation [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2023
Based on the large eddy simulation method, this study performed the three-dimensional transient numerical analysis of the near-wall flow field of the spiral flow in a circular pipe and applied the sub-grid model of the kinetic energy transport.
Z. Wang   +5 more
doaj   +1 more source

Large-eddy simulation and mathematical model of vortex breakdown and pressure drop in a cavity with tubeless vortex reducer

open access: yesEngineering Applications of Computational Fluid Mechanics, 2022
The tubeless vortex reducer was used to reduce the pressure drop in a cavity with radial inflow. In previous studies, the mechanism of vortex breakdown in tubeless vortex reducers was not clear, and there was a lack of direct guidance for engineering ...
Wenjie Shen   +3 more
doaj   +1 more source

Optically induced lattice deformations, electronic structure changes, and enhanced superconductivity in YBa2Cu3O6.48

open access: yesStructural Dynamics, 2017
Resonant optical excitation of apical oxygen vibrational modes in the normal state of underdoped YBa2Cu3O6+x induces a transient state with optical properties similar to those of the equilibrium superconducting state. Amongst these, a divergent imaginary
R. Mankowsky   +12 more
doaj   +1 more source

A novel quantity for identifying the repelling structures of continuous dynamical systems

open access: yesAIMS Mathematics, 2021
We propose a new quantity to study complicated dynamical systems based on the repelling behaviors of particle trajectories throughout the whole time interval under consideration.
Guoqiao You
doaj   +1 more source

Structured transmittance illumination coherence holography

open access: yesScientific Reports, 2022
AbstractThe coherence holography offers an unconventional way to reconstruct the hologram where an incoherent light illumination is used for reconstruction purposes, and object encoded into the hologram is reconstructed as the distribution of the complex coherence function. Measurement of the coherence function usually requires an interferometric setup
Aditya Chandra Mandal   +3 more
openaire   +4 more sources

Large Eddy Simulation of Pulsed Film Cooling with a Dielectric Barrier Discharge Plasma Actuator

open access: yesAerospace, 2023
The effects of the coolant pulsation and the plasma aerodynamic actuation (PAA) on the film cooling are herein explored via large eddy simulations. The electrohydrodynamic force derived from the PAA was solved through the phenomenological plasma model ...
Zhou Shen   +3 more
doaj   +1 more source

Effect of Receiver Holes on Flow and Heat Transfer Characteristics in A Radial Pre-swirl System: A LES Study [PDF]

open access: yesJournal of Applied Fluid Mechanics
As a necessary component of a turboshaft engine, optimizing components in the radial pre-swirl system is critical for improving turbine performance.
D. Wang   +5 more
doaj   +1 more source

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