QQ客服 官方微博 反馈留言

	Biofilm effects on size gradation,drag coefficient and settling velocity of sediment particles
	Qian-qian SHANG ; Hong-wei FANG ; Hui-ming ZHAO ; Guo-jian HE ; Zheng-hui CUI ; Qian-qian SHANG ; Hong-wei FANG ; Hui-ming ZHAO ; Guo-jian HE ; Zheng-hui CUI
	2016-03-30 ; 2016-03-30
关键词	Sediment particle Biofilm Size gradation Drag coefficient Settling velocity TV142
其他题名	Biofilm effects on size gradation,drag coefficient and settling velocity of sediment particles
中文摘要	Sediment particles are often colonized by biofilm in a natural aquatic ecological system,especially in eutrophic water body.A series of laboratory experiments on particle size gradation,drag coefficient and settling velocity were conducted after natural sediment was colonized by biofilm for 5,10,15 and 20 days.Particle image acquisition,particle tracking techniques of Particle Image Velocimetry and Particle Tracking Velocimetry were utilized to analyze the changes of these properties.The experimental results indicate that the size gradation,the drag force exerted on bio-particles,and the settling velocity of bio-particles underwent significant change due to the growth of biofilm onto the sediment surface.The study proposes a characteristic particle size formula and a bio-particle settling velocity formula based on the regression of experiment results,that the settling velocity is only 50%to 60%as the single particle which has the same diameter and density.However,biofilm growth causes large particle which the settling velocities are approximately 10 times larger than that of primary particles.These results may be specifically used in the low energy reservoir or lake environment.; Sediment particles are often colonized by biofilm in a natural aquatic ecological system,especially in eutrophic water body.A series of laboratory experiments on particle size gradation,drag coefficient and settling velocity were conducted after natural sediment was colonized by biofilm for 5,10,15 and 20 days.Particle image acquisition,particle tracking techniques of Particle Image Velocimetry and Particle Tracking Velocimetry were utilized to analyze the changes of these properties.The experimental results indicate that the size gradation,the drag force exerted on bio-particles,and the settling velocity of bio-particles underwent significant change due to the growth of biofilm onto the sediment surface.The study proposes a characteristic particle size formula and a bio-particle settling velocity formula based on the regression of experiment results,that the settling velocity is only 50%to 60%as the single particle which has the same diameter and density.However,biofilm growth causes large particle which the settling velocities are approximately 10 times larger than that of primary particles.These results may be specifically used in the low energy reservoir or lake environment.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/148761]
专题	清华大学
推荐引用方式 GB/T 7714	Qian-qian SHANG,Hong-wei FANG,Hui-ming ZHAO,et al. Biofilm effects on size gradation,drag coefficient and settling velocity of sediment particles[J],2016, 2016.
APA	Qian-qian SHANG.,Hong-wei FANG.,Hui-ming ZHAO.,Guo-jian HE.,Zheng-hui CUI.,...&Zheng-hui CUI.(2016).Biofilm effects on size gradation,drag coefficient and settling velocity of sediment particles..
MLA	Qian-qian SHANG,et al."Biofilm effects on size gradation,drag coefficient and settling velocity of sediment particles".(2016).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。