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 eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 7 - WATER RESOURCES AND HYDROINFORMATICS : Modelling and Analysis of Flow over Stepped Chutes
Modelling and Analysis of Flow over Stepped Chutes
Author : Chaiyuth Chinnarasri, Kanokporn Pokaanon and Varangrat Juntasaro
In the present study, the physical studies of stepped chutes with end sills from the previous research are simulated in a numerical model. Three different heights of the end sill and a model of a stepped chute without an end sill are built. The relative height of the end sill, m\h, is varied from 0.067? 0.200 where m is the height of the end sills and h is the step height. The flow characteristics, energy dissipation, velocity profile, and pressure distribution are studied. It can be demonstrated that the flow over a stepped chute with an end sill can be satisfactorily simulated in the numerical model. The different heights of the end sill differently affect the flow characteristics near the tip of the step. The energy dissipation is also affected by the end sill. For the step with the end sill, the high turbulence and energy dissipation were found to be at least 10% higher than in the horizontal step. The stepped chute with the higher end sill height can dissipate more energy than the stepped chute with the lower end sill height. The maximum velocity of the stepped chute without an end sill is greater than that with an end sill at the same observed location. In addition, the pressure distributions on the vertical and horizontal step faces are investigated.
File Size : 605,181 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 19/07/2016
Download Now