FLOW VISUALIZATION DIGITAL IMAGE-ANALYSIS OF SALTATING PARTICLE MOTIONS

被引：5

作者：

CICCONE, AD

KAWALL, JG

KEFFER, JF

机构：

[1] Dept. of Mechanical Engineering, University of Toronto, Toronto, M5S 1A4, Ontario

来源：

EXPERIMENTS IN FLUIDS | 1990年 / 9卷 / 1-2期

关键词：

D O I：

10.1007/BF00575337

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A novel flow-visualization/digital-image-analysis technique to obtain quantitative information on individual mono-dispersed silica-sand particle motions in a wind-generated turbulent boundary-layer has been developed and implemented. The technique involves recording particle trajectories, which have been illuminated with a strobed plane of light generated via a He-Ne laser, on 35 mm black and white film with a 35 mm SLR camera, converting the negatives into 512 × 512 digital images, enhancing the images via Fast Fourier Transforms, extracting 'dashed' particle lines and then linking the lines together to reconstruct the particle trajectory. The result is a Lagrangian description of the particle path of flight, obtained with the aid of the basic principles of computer vision/artificial intelligence. © 1990 Springer-Verlag.

引用

页码：65 / 73

页数：9