Digital Image Analysis on Motion Parameters of Saltating Sand Grains

您当前的位置：

首页 >

文章列表页 >

Digital Image Analysis on Motion Parameters of Saltating Sand Grains

更新时间：2025-07-09

- Digital Image Analysis on Motion Parameters of Saltating Sand Grains
- Vol. 44, Issue 7, Pages: 109-113(2010)
- 作者机构：
  
  西安交通大学流体工程系,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： X169;O359
- Online First：10 July 2010，
  
  Published：2010
- 稿件说明：
移动端阅览
Digital Image Analysis on Motion Parameters of Saltating Sand Grains[J]. 2010, 44(7): 109-113.
DOI：

Digital Image Analysis on Motion Parameters of Saltating Sand Grains[J]. 2010, 44(7): 109-113. DOI：

摘要

采用高速相机记录了大气边界层风洞中的沙粒跃移运动

并对所获取的跃移图像序列运用双向粒子追踪算法对帧间沙粒进行匹配

从中提取出准确的跃移轨迹.对跃移沙粒位置函数进行基于时间自变量的曲线拟合及求导来计算运动参数

结果表明

与传统方法及降频差分法相比

拟合-求导法能更好地克服数据波动性大、端点数据损失及时间分辨率低等问题

在单颗粒连续性运动量化分析中更具实际意义.结合拟合-求导法和简化受力模型

计算得出了真实跃移过程中阻力加速度的变化以及广义升力在来流方向的作用方式.

Abstract

A high-speed digital camera was adopted to record the saltation of sand grains in an atmospheric boundary layer(ABL)wind tunnel. The bidirectional particle tracking algorithm was employed in matching interframe particles and abstracting trajectories from image sequence. The time based curve fitting and the derivation were applied to calculate motion parameters for the position function of sand particle saltation. Compared with conventional and frequency reduced discrete difference methods

the present curve fitting and continuous derivation method is more effective in single-particle continuous motion analysis. Moreover

the drag acceleration and the way of the general lift force in wind direction are achieved.

关键词

Keywords

references

ANDERSON R S, HAFF P K. Simulation of aeolian saltation [J]. Science, 1988,5(241):820-823.

WANG Dawei, WANG Yuan, YANG Bin, et al. Statistical analysis of sand grain/bed collision process recorded by high-speed digital camera [J]. Sedimentology, 2007,55(2):461-470.

ZHANG Wei, KANG J H, LEE S J. Tracking of saltating sand trajectories over a flat surface embedded in an atmospheric boundary layer [J]. Geomorphology, 2007,86(3):322-331.

OHMI K, LI H Y. Particle-tracking velocimetry with new algorithms [J]. Meas Sci Technol, 2000,11(6):603-616.

SONG Xiangqun, YAMAMOTO F, IGUCHI M, et al. A new tracking algorithm of PIV and removal of spurious vectors using Delaunay tessellation [J]. Exp Fluids, 1999,26(4):371-380.

张洋, 王元, 王大伟. DT-PTV离散相伪矢量的概率择优式剔除算法 [J]. 西安交通大学学报, 2009,43(5):119-123.

ZHANG Yang, WANG Yuan, WANG Dawei. Elimination of discrete phase outliers in DT-PTV by preferential probability [J]. Journal of Xi'an Jiaotong University, 2009,43(5):119-123.

邱玉珺,邹学勇,张春来. 沙粒跃移轨迹参数的统计研究 [J]. 中国沙漠, 2005,25(4):577-580.

QIU Yujun, ZOU Xueyong, ZHANG Chunlai. Statistic study on trajectory parameters of saltating sand grains [J]. Journal of Desert Research, 2005,25(4):577-580.

郭烈锦. 两相与多相流动力学 [M]. 西安:西安交通大学出版社, 2002:351-352.

SAFFMAN P G.. The lift on a small sphere in a slow shear flow [J]. Fluid Mech, 1965,6(22):385-400.

MEI R. An approximate expression for the shear lift force on a spherical particle at finite Reynolds number [J]. Int J Multiphase Flow, 1992,18(1):145-147.

LUN C K K, LIU H S. Numerical simulation of dilute turbulent gas-solid flows in horizontal channels [J]. Int J Multiphase Flow, 1997,23(3):575-605.

杨保, 邹学勇, 王周龙, 等. 气流中跃移颗粒的受力分析 [J]. 地理科学, 1999,19(5):475-478.

YANG Bao, ZOU Xueyong, WANG Zhoulong, et al. Mechanical analysis of a single saltating particle in air flow [J]. Scientia Geographica Sinica, 1999,19(5):475-478.

倪晋仁,李振山. 风沙两相流理论及其应用 [M]. 北京: 科学出版社, 2006:11-14.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Study on Modulating Shape and Velocity of Meso-Scale Bubble Using Surfactants

The Uncertainty Valuation and Reduction in Part Curve Fitting

Integrated and Joint Design Optimization of Centrifugal Compressor Impeller and Casing Treatment at Multiple Working Points

Effects of Steam Addition on the Swirl Combustion and Emission Characteristics of Cracked Ammonia

Electrothermal Coupling Research on the Evolutionary Law of Anti-Corona Performance for High-Altitude Air-Cooled Generators

Related Author

刘艳艳

李彦鹏

朱婷婷

WEI Jinwen

Related Institution

School of Environmental Science and Engineering, Chang'an University

School of Mechanical Engineering, Guangxi University

⁰