IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Numerical simulation of spatial evolution of coherent motions in submerged rigid vegetation patch fl...
Numerical simulation of spatial evolution of coherent motions in submerged rigid vegetation patch flow
Author : WANYUN XUE(1), SHIQIANG WU(2) , XIUFENG WU(3) , JIE ZHOU(4)& JIANGYU DAI(5)
ABSTRACT
A number of Large-eddy simulation studies on flow in a rectangular open channel blocked with an artificial submerged
rigid vegetation patch have focused on the effects of the coherent structures on momentum transfer across the
vegetation edge. The Finite Difference Method (FDM) with Fractional Area/Volume Obstacle Representation (FAVOR)
method and Volume of fluid (VOF) algorithm was used to solve the filtered Navier-Stokes equations on a Cartesian nonuniform
grid. The computed results compared well with experimental measurements. Computational results provided
insight into the spatial evolution of coherent structures and the monami phenomena, and coherent structures (vortices)
gave velocity time series a strong periodic signature. An intermittent low-speed streak, another characteristic of turbulent
boundary layer, also occurred at the vegetation edge, when partial vegetation is present.
File Size : 915,734 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 13/08/2015
Download Now