Results 81 to 90 of about 12,590,314 (158)

Particle Image Velocimetry Algorithm Based on Spike Camera Adaptive Integration

Sensors
In particle image velocimetry (PIV), overexposure is particularly common in regions with high illumination. In particular, strong scattering or background reflection at the liquid–gas interface will make the overexposure phenomenon more obvious ...
Xiaoqiang Li, Changxu Wu, Yichao Wang, Hongyuan Li, Yuan Li, Tiejun Huang, Yuhao Huang, Pengyu Lv   +7 more
doaj   +1 more source

Formation of the leading-edge vortex and spanwise flow on an insect-like flapping-wing throughout a flapping half cycle [PDF]

, 2013
This paper presents an experimental investigation of the evolution of the leading-edge vortex and spanwise flow generated by an insect-like flapping-wing at a Reynolds number relevant to flapping-wing micro air vehicles (FMAVs) (Re = ~15,000 ...
Knowles, Kevin, Phillips, Nathan
core   +1 more source

Non-Periodic Reconstruction from Sub-Sampled Velocity Measurement Data Based on Data-Fusion Compressed Sensing

Fluids
Compressive sensing (CS) is capable of resolving high frequencies from subsampled data. However, it is challenging to apply CS in non-periodic flow fields with multiple frequencies.
Jun Hong, Ziyu Chen, Jiawei Lu, Gang Xiao   +3 more
doaj   +1 more source

Wind tunnel flow visualization experimental study on the influence of vortex generators on the low-speed characteristics of civil transport aircraft

Hangkong gongcheng jinzhan
The vortex generator is a simple passive flow control technology that has potential positive benefits for delaying the separation of the fluid boundary layer and improving the take-off and landing performance of the aircraft. Through wind tunnel tests on
YAN Wei, XU Huiwen, WANG Qimin, CHEN Mengying, ZHANG Meihong, ZHAO Keliang, JIAO Renshan, NIU Zhongguo, WANG Fei, ZENG Weiping   +9 more
doaj   +1 more source

TransformerPIV: An Improved Large-Scale Flow Motion Estimation Method Based on Self-Attention Mechanism

Computation
Particle image velocimetry (PIV), as a widely used technique for measuring flow velocity fields and characterizing flow behavior, is widely used across various fluid mechanics applications, such as aerodynamics and fluid mechanics.
Bo Feng, Dongsheng Zhao, Junwen Tao, Guofeng Wei, Ruixiong Li   +4 more
doaj   +1 more source

Determine of velocity field with PIV and CFD during the flow around of bridge piers

EPJ Web of Conferences, 2013
The article describes the processing of specific junior research FAST-J-11-51/1456 which dealt with physical and CFD of the velocity field during the flow around of bridge piers.
Picka D., Mistrová I.
doaj   +1 more source

Information Entropy Analysis of a PIV Image Based on Wavelet Decomposition and Reconstruction

Entropy
In particle image velocimetry (PIV) experiments, background noise inevitably exists in the particle images when a particle image is being captured or transmitted, which blurs the particle image, reduces the information entropy of the image, and finally ...
Zhiwu Ke, Wei Zheng, Xiaoyu Wang, Mei Lin   +3 more
doaj   +1 more source

PARTICLE IMAGING VELOCIMETRY (PIV) TECHNIQUE: PRINCIPLES AND APPLICATIONS, REVIEW [PDF]

Yanbu Journal of Engineering and Science
In solving engineering optimization problems; very special cases of the problems can be solved in polynomial time while, most of them are considered as hard combinatorial optimization problems "NP-hard", and most of the solution algorithms for these problems are based on numerical linear and nonlinear programming methods that require substantial ...
openaire   +2 more sources

Applying colour-coded particle image velocimetry to the wake of a delta wing across a wide range of angles of attack

Journal of Fluid Science and Technology
The forces acting on a delta wing are predominantly influenced by local flow structures, specifically leading-edge vortices (LEVs). This study applies colour-coded particle image velocimetry (PIV) to quantify wake dynamics and lift generation for a delta
Shūji ŌTOMO, Kokoro OCHI, Hyun-Jin PARK, Yuji TASAKA, Yuichi MURAI   +4 more
doaj   +1 more source

Monocular 3D Micro-PIV System Using Computational Imaging

IEEE Photonics Journal
A three-dimensional (3D) particle image velocimetry (PIV) system typically consists of multiple cameras. However, micro-PIV systems for measuring microscale velocity fields lack sufficient space to accommodate them. In this work we propose an alternative
Taiyuange Lou, Chengxiang Guo, Tong Yang, Lei Yang, Hongbo Xie   +4 more
doaj   +1 more source